[FFmpeg-devel] Implement NewTek NDI support

Submitted by Maksym Veremeyenko on Aug. 8, 2017, 9:29 a.m.

Details

Message ID 852ebded-b0e5-f3e4-0572-c311b94e34ee@m1stereo.tv
State Superseded
Headers show

Commit Message

Maksym Veremeyenko Aug. 8, 2017, 9:29 a.m.
On 05.08.2017 22:46, Marton Balint wrote:
> On Thu, 3 Aug 2017, Maksym Veremeyenko wrote:
[...]
> About the warnings for the bottom field order and the negative linesize,
> I still think it is better to reject them (return an error), this way
> the user will be forced to fix the input, by changing the field order
> (e.g by using the fieldorder filter before passing video) or getting rid
> of the negative linesize.
done

> To support negative linesizes, there is one more thing you might do: If the
> source frame has a negative linesize, then instead of cloning, allocate
> a new
> avframe with av_frame_alloc, set widht/height/format, use
> av_frame_get_buffer
> to allocate a buffer, then use av_frame_copy to copy the data from the
> source
> frame to the newly allocated one which should have a positive linesize.
> A bit too much work for a rarely used feature, but if you are
> interested, it is
> doable. You can generate a negative linesize source with the vflip filter.
>
i though it really transparent...

> I did some further tests, and I still cannot see my own ffmpeg generated
> source, I am running this command:
>
> ./ffmpeg -nostdin -f libndi_newtek -wait_sources 10 -find_sources 1 -i
> none & ./ffmpeg -f lavfi -i mptestsrc,format=pix_fmts=uyvy422 -f
> libndi_newtek dummy
>
> Even after 10 seconds, the first process finds 0 sources, the second
> process is
> running happily. Does this work for you?

Check if *avahi* daemon is running and firewall turned off.

[root@dev-5 ffmpeg.git-head]# ffmpeg -v debug -nostdin -f libndi_newtek 
-wait_sources 10 -find_sources 1 -i none & ffmpeg -f lavfi -i 
mptestsrc,format=pix_fmts=uyvy422 -f libndi_newtek dummy
/.../
[libndi_newtek @ 0x211bdc0] Waiting for sources 10000 miliseconds
Output #0, libndi_newtek, to 'dummy':
   Metadata:
     encoder         : Lavf57.76.100
     Stream #0:0: Video: wrapped_avframe, uyvy422, 512x512 [SAR 1:1 DAR 
1:1], q=2-31, 200 kb/s, 25 fps, 10000k tbn, 25 tbc
     Metadata:
       encoder         : Lavc57.102.100 wrapped_avframe
[libndi_newtek @ 0x211bdc0] NDIlib_find_wait_for_sources returns 1
[libndi_newtek @ 0x211bdc0] Waiting for sources 10000 miliseconds
[libndi_newtek @ 0x211bdc0] NDIlib_find_wait_for_sources returns 1
[libndi_newtek @ 0x211bdc0] Waiting for sources 10000 miliseconds
[libndi_newtek @ 0x211bdc0] NDIlib_find_wait_for_sources returns 1
[libndi_newtek @ 0x211bdc0] Waiting for sources 10000 miliseconds
[libndi_newtek @ 0x211bdc0] NDIlib_find_wait_for_sources returns 1peed=40.1x
[libndi_newtek @ 0x211bdc0] Waiting for sources 10000 miliseconds
[libndi_newtek @ 0x211bdc0] NDIlib_find_wait_for_sources returns 
0speed=41.4x
[libndi_newtek @ 0x211bdc0] Found 4 NDI sources:
[libndi_newtek @ 0x211bdc0]     'DEV-5.INTERNAL.M1STEREO.TV (dummy)' 
'10.1.5.57:5961'
[libndi_newtek @ 0x211bdc0]     'H264-LIVE (CH1)'       '10.1.5.99:5961'
[libndi_newtek @ 0x211bdc0]     'H264-LIVE (CH2)'       '10.1.5.99:5962'
[libndi_newtek @ 0x211bdc0]     'H264-LIVE (CH3)'       '10.1.5.99:5963'
none: Immediate exit requested
frame=24732 fps=1036 q=-0.0 Lsize=N/A time=00:16:29.24 bitrate=N/A 
speed=41.4x
/.../

i also found that there are some problem with older version of dbus that 
supplied with CentOs7 - it is not thread-safe of NDI functioning.

>> +@subsection Examples
>> +
>> +@itemize
>> +
>> +@item
>> +Play video clip:
>> +@example
>> +ffmpeg -i
>> "udp://@239.1.1.1:10480?fifo_size=1000000&overrun_nonfatal=1" -vf
>> "scale=720:576,fps=fps=25,setdar=dar=16/9,format=pix_fmts=uyvy422" -f
>> libndi_newtek NEW_NDI1
>
> @ needs escaping into @@
done

>> +    while (1)
>> +    {
>> +        int f, t = ctx->wait_sources / 1000;
>> +        av_log(avctx, AV_LOG_DEBUG, "Waiting for sources %d
>> miliseconds\n", t);
>> +        f = NDIlib_find_wait_for_sources(ctx->ndi_find, t);
>> +        av_log(avctx, AV_LOG_DEBUG, "NDIlib_find_wait_for_sources
>> returns %d\n", f);
>> +        if (!f)
>> +            break;
>> +    };
>
> You should not loop indefinitely, give up after a few tries.

from my researches, each loop iteration adds new source, so if you have 
40 sources, then you'll have 40+ iterations. moreover, if no new sources 
found, NDIlib_find_wait_for_sources will block only for specified period 
(default value is 0.5 second). so, there are no default way to make this 
loop indefinite.

>> +static int ndi_write_video_packet(AVFormatContext *avctx, AVStream
>> *st, AVPacket *pkt)
>> +{
>> +    struct NDIContext *ctx = avctx->priv_data;
>> +    AVFrame *avframe, *tmp = (AVFrame *)pkt->data;
>> +
>> +    if (tmp->format != AV_PIX_FMT_UYVY422 ||
>> +        tmp->width  != ctx->video->xres ||
>> +        tmp->height != ctx->video->yres) {
>> +        av_log(avctx, AV_LOG_ERROR, "Got a frame with invalid pixel
>> format or dimension.\n");
>> +        av_log(avctx, AV_LOG_ERROR, "tmp->width=%d, tmp->height=%d,
>> ctx->video->xres=%d, ctx->video->yres=%d\n", tmp->width, tmp->height,
>> ctx->video->xres, ctx->video->yres);
>> +        return AVERROR(EINVAL);
>> +    }
>> +    avframe = av_frame_clone(tmp);
>> +    if (!avframe) {
>> +        av_log(avctx, AV_LOG_ERROR, "Could not clone video frame.\n");
>
> For ENOMEM we typically don't use an error message.
done

>> +static int ndi_write_header(AVFormatContext *avctx)
>> +{
>> +    int ret = 0;
>> +    unsigned int n;
>> +    struct NDIContext *ctx = avctx->priv_data;
>> +    const NDIlib_send_create_t ndi_send_desc = { .p_ndi_name =
>> avctx->filename,
>> +        .p_groups = NULL, .clock_video = false, .clock_audio = false };
>
> Setting both clock_video and clock_audio to false is intentional? Maybe
> better
> to clock based on the stream types you get? (E.g. clock to video if you
> have a
> video stream, clock to audio otherwise?)

i see no reason setting it true - we have properly clocked audio/video 
samples sent to SDK,

BUT, for some experimental reason, i added two parameters *clock_audio* 
and *clock_video* that could be used for testings or tuning for 
appropriate conditions

Comments

Marton Balint Aug. 13, 2017, 9 p.m.
On Tue, 8 Aug 2017, Maksym Veremeyenko wrote:

> [...]

>
> Check if *avahi* daemon is running and firewall turned off.

Thanks, it works now.

I have some final comments, after addressing those, I guess this can be 
applied, it's been discussed for quite a long time now.

[...]

> +static int ndi_set_video_packet(AVFormatContext *avctx, NDIlib_video_frame_t *v, AVPacket *pkt)
> +{
> +    int ret;
> +    struct NDIContext *ctx = avctx->priv_data;
> +
> +    ret = av_new_packet(pkt, v->yres * v->line_stride_in_bytes);
> +    if (ret < 0)
> +        return ret;

You are leaking the NDI video frame here on error. Maybe better to put
NDIlib_recv_free_video into the parent function.

> +
> +    pkt->dts = pkt->pts = av_rescale_q(v->timecode, NDI_TIME_BASE_Q, ctx->video_st->time_base);
> +    pkt->duration = av_rescale_q(1, (AVRational){v->frame_rate_D, v->frame_rate_N}, ctx->video_st->time_base);
> +
> +    av_log(avctx, AV_LOG_DEBUG, "%s: pkt->dts = pkt->pts = %"PRId64", duration=%"PRId64", timecode=%"PRId64"\n",
> +        __func__, pkt->dts, pkt->duration, v->timecode);
> +
> +    pkt->flags         |= AV_PKT_FLAG_KEY;
> +    pkt->stream_index   = ctx->video_st->index;
> +
> +    memcpy(pkt->data, v->p_data, pkt->size);
> +
> +    NDIlib_recv_free_video(ctx->recv, v);
> +
> +    return 0;
> +}
> +
> +static int ndi_set_audio_packet(AVFormatContext *avctx, NDIlib_audio_frame_t *a, AVPacket *pkt)
> +{
> +    int ret;
> +    struct NDIContext *ctx = avctx->priv_data;
> +
> +    NDIlib_audio_frame_interleaved_16s_t dst;
> +
> +    ret = av_new_packet(pkt, 2 * a->no_samples * a->no_channels);
> +    if (ret < 0)
> +        return ret;

Similar to the previous case, you are leaking the NDI audio frame here on 
error. Maybe better to put NDIlib_recv_free_audio into the parent 
function.

> +
> +    pkt->dts = pkt->pts = av_rescale_q(a->timecode, NDI_TIME_BASE_Q, ctx->audio_st->time_base);
> +    pkt->duration = av_rescale_q(1, (AVRational){a->no_samples, a->sample_rate}, ctx->audio_st->time_base);
> +
> +    av_log(avctx, AV_LOG_DEBUG, "%s: pkt->dts = pkt->pts = %"PRId64", duration=%"PRId64", timecode=%"PRId64"\n",
> +        __func__, pkt->dts, pkt->duration, a->timecode);
> +
> +    pkt->flags       |= AV_PKT_FLAG_KEY;
> +    pkt->stream_index = ctx->audio_st->index;
> +
> +    dst.reference_level = 0;
> +    dst.p_data = (short *)pkt->data;
> +    NDIlib_util_audio_to_interleaved_16s(a, &dst);
> +
> +    NDIlib_recv_free_audio(ctx->recv, a);
> +
> +    return 0;
> +}


[...]

> +static int ndi_create_video_stream(AVFormatContext *avctx, NDIlib_video_frame_t *v)
> +{
> +    AVStream *st;
> +    AVRational tmp;
> +    struct NDIContext *ctx = avctx->priv_data;
> +
> +    st = avformat_new_stream(avctx, NULL);
> +    if (!st) {
> +        av_log(avctx, AV_LOG_ERROR, "Cannot add video stream\n");
> +        return AVERROR(ENOMEM);
> +    }
> +
> +    st->time_base                   = NDI_TIME_BASE_Q;
> +    av_stream_set_r_frame_rate(st, av_make_q(v->frame_rate_N, v->frame_rate_D));
> +
> +    tmp = av_mul_q(av_d2q(v->picture_aspect_ratio, INT_MAX), (AVRational){v->yres, v->xres});
> +    av_reduce(&st->sample_aspect_ratio.num, &st->sample_aspect_ratio.den, tmp.num, tmp.den, 1000);
> +    st->codecpar->sample_aspect_ratio = st->sample_aspect_ratio;
> +
> +    st->codecpar->codec_type        = AVMEDIA_TYPE_VIDEO;
> +    st->codecpar->width             = v->xres;
> +    st->codecpar->height            = v->yres;
> +    st->codecpar->codec_id          = AV_CODEC_ID_RAWVIDEO;
> +    st->codecpar->bit_rate          = av_rescale(v->xres * v->yres * 16, v->frame_rate_N, v->frame_rate_D);
> +    st->codecpar->field_order       = v->frame_format_type == NDIlib_frame_format_type_progressive
> +        ? AV_FIELD_PROGRESSIVE : AV_FIELD_TT;
> +
> +    if (NDIlib_FourCC_type_UYVY == v->FourCC || NDIlib_FourCC_type_UYVA == v->FourCC) {

You should give the user a warning here in case of UYVA format, because you are
going to skip the alpha channel.

> +        st->codecpar->format        = AV_PIX_FMT_UYVY422;
> +        st->codecpar->codec_tag     = MKTAG('U', 'Y', 'V', 'Y');
> +    } else if (NDIlib_FourCC_type_BGRA == v->FourCC) {
> +        st->codecpar->format        = AV_PIX_FMT_BGRA;
> +        st->codecpar->codec_tag     = MKTAG('B', 'G', 'R', 'A');
> +    } else if (NDIlib_FourCC_type_BGRX == v->FourCC) {
> +        st->codecpar->format        = AV_PIX_FMT_BGR0;
> +        st->codecpar->codec_tag     = MKTAG('B', 'G', 'R', '0');
> +    } else if (NDIlib_FourCC_type_RGBA == v->FourCC) {
> +        st->codecpar->format        = AV_PIX_FMT_RGBA;
> +        st->codecpar->codec_tag     = MKTAG('R', 'G', 'B', 'A');
> +    } else if (NDIlib_FourCC_type_RGBX == v->FourCC) {
> +        st->codecpar->format        = AV_PIX_FMT_RGB0;
> +        st->codecpar->codec_tag     = MKTAG('R', 'G', 'B', '0');
> +    } else {
> +        av_log(avctx, AV_LOG_ERROR, "Unsupported video stream format, v->FourCC=%d\n", v->FourCC);
> +        return AVERROR(EINVAL);
> +    }
> +
> +    avpriv_set_pts_info(st, 64, 1, NDI_TIME_BASE);
> +
> +    ctx->video_st = st;
> +
> +    return 0;
> +}

[...]

> +static int ndi_read_packet(AVFormatContext *avctx, AVPacket *pkt)
> +{
> +    int ret = 0;
> +    struct NDIContext *ctx = avctx->priv_data;
> +
> +    while (1) {
> +        NDIlib_video_frame_t v;
> +        NDIlib_audio_frame_t a;
> +        NDIlib_metadata_frame_t m;
> +        NDIlib_frame_type_e t;
> +
> +        t = NDIlib_recv_capture(ctx->recv, &v, &a, &m, 40);
> +
> +        if (NDIlib_frame_type_video == t) {
> +            if (!ctx->video_st) {
> +                ret = ndi_create_video_stream(avctx, &v);
> +                if (ret < 0)
> +                    return ret;

You are leaking the video frame here on error.

> +            }
> +            ret = ndi_set_video_packet(avctx, &v, pkt);
> +            break;
> +        }
> +        else if (NDIlib_frame_type_audio == t) {
> +            if (!ctx->audio_st) {
> +                ret = ndi_create_audio_stream(avctx, &a);
> +                if (ret < 0)
> +                    return ret;

You are leaking the audio frame here on error.

> +            }
> +            ret = ndi_set_audio_packet(avctx, &a, pkt);
> +            break;
> +        }
> +        else if (NDIlib_frame_type_metadata == t)
> +            NDIlib_recv_free_metadata(ctx->recv, &m);
> +        else if (NDIlib_frame_type_none != t){
> +            av_log(avctx, AV_LOG_ERROR, "NDIlib_recv_capture returns %d\n", t);
> +        }
> +    };
> +
> +    return ret;
> +}
> +

[...]

> +static int ndi_write_trailer(AVFormatContext *avctx)
> +{
> +    struct NDIContext *ctx = avctx->priv_data;
> +
> +    if (ctx->ndi_send) {
> +        NDIlib_send_destroy(ctx->ndi_send);
> +
> +        if (ctx->last_avframe)
> +            av_frame_free(&ctx->last_avframe);

You might spare the 'if' here, av_frame_free handles the NULL pointer as well.

> +    }
> +
> +    if (ctx->video)
> +        av_freep(&ctx->video);

Same here.

> +
> +    if (ctx->audio)
> +        av_freep(&ctx->audio);

And here.

> +
> +    return 0;
> +}
> +

Regards,
Marton
Ali KIZIL Aug. 17, 2017, 8:42 a.m.
2017-08-14 0:00 GMT+03:00 Marton Balint <cus@passwd.hu>:

>
> On Tue, 8 Aug 2017, Maksym Veremeyenko wrote:
>
> [...]
>>
>
>
>> Check if *avahi* daemon is running and firewall turned off.
>>
>
> Thanks, it works now.
>
> I have some final comments, after addressing those, I guess this can be
> applied, it's been discussed for quite a long time now.
>
> [...]
>
> +static int ndi_set_video_packet(AVFormatContext *avctx,
>> NDIlib_video_frame_t *v, AVPacket *pkt)
>> +{
>> +    int ret;
>> +    struct NDIContext *ctx = avctx->priv_data;
>> +
>> +    ret = av_new_packet(pkt, v->yres * v->line_stride_in_bytes);
>> +    if (ret < 0)
>> +        return ret;
>>
>
> You are leaking the NDI video frame here on error. Maybe better to put
> NDIlib_recv_free_video into the parent function.
>
> +
>> +    pkt->dts = pkt->pts = av_rescale_q(v->timecode, NDI_TIME_BASE_Q,
>> ctx->video_st->time_base);
>> +    pkt->duration = av_rescale_q(1, (AVRational){v->frame_rate_D,
>> v->frame_rate_N}, ctx->video_st->time_base);
>> +
>> +    av_log(avctx, AV_LOG_DEBUG, "%s: pkt->dts = pkt->pts = %"PRId64",
>> duration=%"PRId64", timecode=%"PRId64"\n",
>> +        __func__, pkt->dts, pkt->duration, v->timecode);
>> +
>> +    pkt->flags         |= AV_PKT_FLAG_KEY;
>> +    pkt->stream_index   = ctx->video_st->index;
>> +
>> +    memcpy(pkt->data, v->p_data, pkt->size);
>> +
>> +    NDIlib_recv_free_video(ctx->recv, v);
>> +
>> +    return 0;
>> +}
>> +
>> +static int ndi_set_audio_packet(AVFormatContext *avctx,
>> NDIlib_audio_frame_t *a, AVPacket *pkt)
>> +{
>> +    int ret;
>> +    struct NDIContext *ctx = avctx->priv_data;
>> +
>> +    NDIlib_audio_frame_interleaved_16s_t dst;
>> +
>> +    ret = av_new_packet(pkt, 2 * a->no_samples * a->no_channels);
>> +    if (ret < 0)
>> +        return ret;
>>
>
> Similar to the previous case, you are leaking the NDI audio frame here on
> error. Maybe better to put NDIlib_recv_free_audio into the parent function.
>
> +
>> +    pkt->dts = pkt->pts = av_rescale_q(a->timecode, NDI_TIME_BASE_Q,
>> ctx->audio_st->time_base);
>> +    pkt->duration = av_rescale_q(1, (AVRational){a->no_samples,
>> a->sample_rate}, ctx->audio_st->time_base);
>> +
>> +    av_log(avctx, AV_LOG_DEBUG, "%s: pkt->dts = pkt->pts = %"PRId64",
>> duration=%"PRId64", timecode=%"PRId64"\n",
>> +        __func__, pkt->dts, pkt->duration, a->timecode);
>> +
>> +    pkt->flags       |= AV_PKT_FLAG_KEY;
>> +    pkt->stream_index = ctx->audio_st->index;
>> +
>> +    dst.reference_level = 0;
>> +    dst.p_data = (short *)pkt->data;
>> +    NDIlib_util_audio_to_interleaved_16s(a, &dst);
>> +
>> +    NDIlib_recv_free_audio(ctx->recv, a);
>> +
>> +    return 0;
>> +}
>>
>
>
> [...]
>
> +static int ndi_create_video_stream(AVFormatContext *avctx,
>> NDIlib_video_frame_t *v)
>> +{
>> +    AVStream *st;
>> +    AVRational tmp;
>> +    struct NDIContext *ctx = avctx->priv_data;
>> +
>> +    st = avformat_new_stream(avctx, NULL);
>> +    if (!st) {
>> +        av_log(avctx, AV_LOG_ERROR, "Cannot add video stream\n");
>> +        return AVERROR(ENOMEM);
>> +    }
>> +
>> +    st->time_base                   = NDI_TIME_BASE_Q;
>> +    av_stream_set_r_frame_rate(st, av_make_q(v->frame_rate_N,
>> v->frame_rate_D));
>> +
>> +    tmp = av_mul_q(av_d2q(v->picture_aspect_ratio, INT_MAX),
>> (AVRational){v->yres, v->xres});
>> +    av_reduce(&st->sample_aspect_ratio.num,
>> &st->sample_aspect_ratio.den, tmp.num, tmp.den, 1000);
>> +    st->codecpar->sample_aspect_ratio = st->sample_aspect_ratio;
>> +
>> +    st->codecpar->codec_type        = AVMEDIA_TYPE_VIDEO;
>> +    st->codecpar->width             = v->xres;
>> +    st->codecpar->height            = v->yres;
>> +    st->codecpar->codec_id          = AV_CODEC_ID_RAWVIDEO;
>> +    st->codecpar->bit_rate          = av_rescale(v->xres * v->yres * 16,
>> v->frame_rate_N, v->frame_rate_D);
>> +    st->codecpar->field_order       = v->frame_format_type ==
>> NDIlib_frame_format_type_progressive
>> +        ? AV_FIELD_PROGRESSIVE : AV_FIELD_TT;
>> +
>> +    if (NDIlib_FourCC_type_UYVY == v->FourCC || NDIlib_FourCC_type_UYVA
>> == v->FourCC) {
>>
>
> You should give the user a warning here in case of UYVA format, because
> you are
> going to skip the alpha channel.
>
> +        st->codecpar->format        = AV_PIX_FMT_UYVY422;
>> +        st->codecpar->codec_tag     = MKTAG('U', 'Y', 'V', 'Y');
>> +    } else if (NDIlib_FourCC_type_BGRA == v->FourCC) {
>> +        st->codecpar->format        = AV_PIX_FMT_BGRA;
>> +        st->codecpar->codec_tag     = MKTAG('B', 'G', 'R', 'A');
>> +    } else if (NDIlib_FourCC_type_BGRX == v->FourCC) {
>> +        st->codecpar->format        = AV_PIX_FMT_BGR0;
>> +        st->codecpar->codec_tag     = MKTAG('B', 'G', 'R', '0');
>> +    } else if (NDIlib_FourCC_type_RGBA == v->FourCC) {
>> +        st->codecpar->format        = AV_PIX_FMT_RGBA;
>> +        st->codecpar->codec_tag     = MKTAG('R', 'G', 'B', 'A');
>> +    } else if (NDIlib_FourCC_type_RGBX == v->FourCC) {
>> +        st->codecpar->format        = AV_PIX_FMT_RGB0;
>> +        st->codecpar->codec_tag     = MKTAG('R', 'G', 'B', '0');
>> +    } else {
>> +        av_log(avctx, AV_LOG_ERROR, "Unsupported video stream format,
>> v->FourCC=%d\n", v->FourCC);
>> +        return AVERROR(EINVAL);
>> +    }
>> +
>> +    avpriv_set_pts_info(st, 64, 1, NDI_TIME_BASE);
>> +
>> +    ctx->video_st = st;
>> +
>> +    return 0;
>> +}
>>
>
> [...]
>
> +static int ndi_read_packet(AVFormatContext *avctx, AVPacket *pkt)
>> +{
>> +    int ret = 0;
>> +    struct NDIContext *ctx = avctx->priv_data;
>> +
>> +    while (1) {
>> +        NDIlib_video_frame_t v;
>> +        NDIlib_audio_frame_t a;
>> +        NDIlib_metadata_frame_t m;
>> +        NDIlib_frame_type_e t;
>> +
>> +        t = NDIlib_recv_capture(ctx->recv, &v, &a, &m, 40);
>> +
>> +        if (NDIlib_frame_type_video == t) {
>> +            if (!ctx->video_st) {
>> +                ret = ndi_create_video_stream(avctx, &v);
>> +                if (ret < 0)
>> +                    return ret;
>>
>
> You are leaking the video frame here on error.
>
> +            }
>> +            ret = ndi_set_video_packet(avctx, &v, pkt);
>> +            break;
>> +        }
>> +        else if (NDIlib_frame_type_audio == t) {
>> +            if (!ctx->audio_st) {
>> +                ret = ndi_create_audio_stream(avctx, &a);
>> +                if (ret < 0)
>> +                    return ret;
>>
>
> You are leaking the audio frame here on error.
>
> +            }
>> +            ret = ndi_set_audio_packet(avctx, &a, pkt);
>> +            break;
>> +        }
>> +        else if (NDIlib_frame_type_metadata == t)
>> +            NDIlib_recv_free_metadata(ctx->recv, &m);
>> +        else if (NDIlib_frame_type_none != t){
>> +            av_log(avctx, AV_LOG_ERROR, "NDIlib_recv_capture returns
>> %d\n", t);
>> +        }
>> +    };
>> +
>> +    return ret;
>> +}
>> +
>>
>
> [...]
>
> +static int ndi_write_trailer(AVFormatContext *avctx)
>> +{
>> +    struct NDIContext *ctx = avctx->priv_data;
>> +
>> +    if (ctx->ndi_send) {
>> +        NDIlib_send_destroy(ctx->ndi_send);
>> +
>> +        if (ctx->last_avframe)
>> +            av_frame_free(&ctx->last_avframe);
>>
>
> You might spare the 'if' here, av_frame_free handles the NULL pointer as
> well.
>
> +    }
>> +
>> +    if (ctx->video)
>> +        av_freep(&ctx->video);
>>
>
> Same here.
>
> +
>> +    if (ctx->audio)
>> +        av_freep(&ctx->audio);
>>
>
> And here.
>
> +
>> +    return 0;
>> +}
>> +
>>
>
> Regards,
> Marton
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>

As general infomation, NDI v3 SDK is released at:
http://pages.newtek.com/NDI-Developers-SDK-Download-Link.html
Maksym Veremeyenko Aug. 18, 2017, 3:51 p.m.
On 17.08.2017 11:42, Ali KIZIL wrote:
[...]
>
> As general infomation, NDI v3 SDK is released at:
> http://pages.newtek.com/NDI-Developers-SDK-Download-Link.html

i found two issues with v3, so wait for final issues resolving.

Patch hide | download patch | download mbox

From ddff33e4f7cc4e1428d140765cc02858ae563f42 Mon Sep 17 00:00:00 2001
From: Maksym Veremeyenko <verem@m1.tv>
Date: Tue, 8 Aug 2017 05:26:23 -0400
Subject: [PATCH] lavd: implement NewTek NDI input/output device support

---
 Changelog                          |   1 +
 configure                          |   9 +
 doc/indevs.texi                    |  48 ++++++
 doc/outdevs.texi                   |  45 +++++
 libavdevice/Makefile               |   4 +
 libavdevice/alldevices.c           |   1 +
 libavdevice/libndi_newtek_common.h |  30 ++++
 libavdevice/libndi_newtek_dec.c    | 341 +++++++++++++++++++++++++++++++++++++
 libavdevice/libndi_newtek_enc.c    | 305 +++++++++++++++++++++++++++++++++
 libavdevice/version.h              |   2 +-
 10 files changed, 785 insertions(+), 1 deletion(-)
 create mode 100644 libavdevice/libndi_newtek_common.h
 create mode 100644 libavdevice/libndi_newtek_dec.c
 create mode 100644 libavdevice/libndi_newtek_enc.c

diff --git a/Changelog b/Changelog
index c797d68..eeafa9a 100644
--- a/Changelog
+++ b/Changelog
@@ -32,6 +32,7 @@  version <next>:
 - unpremultiply video filter
 - tlut2 video filter
 - floodfill video filter
+- NewTek NDI input/output device
 
 version 3.3:
 - CrystalHD decoder moved to new decode API
diff --git a/configure b/configure
index 66c7b94..32ee901 100755
--- a/configure
+++ b/configure
@@ -277,6 +277,7 @@  External library support:
   --enable-libzvbi         enable teletext support via libzvbi [no]
   --disable-lzma           disable lzma [autodetect]
   --enable-decklink        enable Blackmagic DeckLink I/O support [no]
+  --enable-libndi_newtek   enable Newteck NDI I/O support [no]
   --enable-mediacodec      enable Android MediaCodec support [no]
   --enable-libmysofa       enable libmysofa, needed for sofalizer filter [no]
   --enable-openal          enable OpenAL 1.1 capture support [no]
@@ -1508,6 +1509,7 @@  EXTERNAL_LIBRARY_GPL_LIST="
 
 EXTERNAL_LIBRARY_NONFREE_LIST="
     decklink
+    libndi_newtek
     libfdk_aac
     openssl
 "
@@ -3013,6 +3015,10 @@  decklink_indev_deps="decklink threads"
 decklink_indev_extralibs="-lstdc++"
 decklink_outdev_deps="decklink threads"
 decklink_outdev_extralibs="-lstdc++"
+libndi_newtek_indev_deps="libndi_newtek"
+libndi_newtek_indev_extralibs="-lndi"
+libndi_newtek_outdev_deps="libndi_newtek"
+libndi_newtek_outdev_extralibs="-lndi"
 dshow_indev_deps="IBaseFilter"
 dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid -loleaut32 -lshlwapi"
 dv1394_indev_deps="dv1394"
@@ -5566,6 +5572,8 @@  avisynth_demuxer_extralibs='$ldl'
 cuda_extralibs='$ldl'
 decklink_outdev_extralibs="$decklink_outdev_extralibs $ldl"
 decklink_indev_extralibs="$decklink_indev_extralibs $ldl"
+libndi_newtek_outdev_extralibs="$libndi_newtek_outdev_extralibs $ldl"
+libndi_newtek_indev_extralibs="$libndi_newtek_indev_extralibs $ldl"
 frei0r_filter_extralibs='$ldl'
 frei0r_src_filter_extralibs='$ldl'
 ladspa_filter_extralibs='$ldl'
@@ -5824,6 +5832,7 @@  enabled coreimage_filter  && { check_header_objcc QuartzCore/CoreImage.h || disa
 enabled coreimagesrc_filter && { check_header_objcc QuartzCore/CoreImage.h || disable coreimagesrc_filter; }
 enabled decklink          && { { check_header DeckLinkAPI.h || die "ERROR: DeckLinkAPI.h header not found"; } &&
                                { check_cpp_condition DeckLinkAPIVersion.h "BLACKMAGIC_DECKLINK_API_VERSION >= 0x0a060100" || die "ERROR: Decklink API version must be >= 10.6.1."; } }
+enabled libndi_newtek     && { check_header Processing.NDI.Lib.h || die "ERROR: Processing.NDI.Lib.h header not found"; }
 enabled frei0r            && { check_header frei0r.h || die "ERROR: frei0r.h header not found"; }
 enabled gmp               && require gmp gmp.h mpz_export -lgmp
 enabled gnutls            && require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
diff --git a/doc/indevs.texi b/doc/indevs.texi
index 09e3321..bf6dbe3 100644
--- a/doc/indevs.texi
+++ b/doc/indevs.texi
@@ -327,6 +327,54 @@  ffmpeg -channels 16 -format_code Hi50 -f decklink -i 'UltraStudio Mini Recorder'
 
 @end itemize
 
+@section libndi_newtek
+
+The libndi_newtek input device provides capture capabilities for using NDI (Network
+Device Interface, standard created by NewTek).
+
+Input filename is a NDI source name that could be found by sending -find_sources 1
+to command line - it has no specific syntax but human-readable formatted.
+
+To enable this input device, you need the NDI SDK and you
+need to configure with the appropriate @code{--extra-cflags}
+and @code{--extra-ldflags}.
+
+@subsection Options
+
+@table @option
+
+@item find_sources
+If set to @option{true}, print a list of found/available NDI sources and exit.
+Defaults to @option{false}.
+
+@item wait_sources
+Override time to wait until the number of online sources have changed.
+Defaults to @option{0.5}.
+
+@item allow_video_fields
+When this flag is @option{false}, all video that you receive will be progressive.
+Defaults to @option{true}.
+
+@end table
+
+@subsection Examples
+
+@itemize
+
+@item
+List input devices:
+@example
+ffmpeg -f libndi_newtek -find_sources 1 -i dummy
+@end example
+
+@item
+Restream to NDI:
+@example
+ffmpeg -f libndi_newtek -i "DEV-5.INTERNAL.M1STEREO.TV (NDI_SOURCE_NAME_1)" -f libndi_newtek -y NDI_SOURCE_NAME_2
+@end example
+
+@end itemize
+
 @section dshow
 
 Windows DirectShow input device.
diff --git a/doc/outdevs.texi b/doc/outdevs.texi
index df41cc8..558ff9d 100644
--- a/doc/outdevs.texi
+++ b/doc/outdevs.texi
@@ -182,6 +182,51 @@  ffmpeg -i test.avi -f decklink -pix_fmt uyvy422 -s 720x486 -r 24000/1001 'DeckLi
 
 @end itemize
 
+@section libndi_newtek
+
+The libndi_newtek output device provides playback capabilities for using NDI (Network
+Device Interface, standard created by NewTek).
+
+Output filename is a NDI name.
+
+To enable this output device, you need the NDI SDK and you
+need to configure with the appropriate @code{--extra-cflags}
+and @code{--extra-ldflags}.
+
+NDI is very picky about the formats it supports. Pixel format is always
+uyvy422.
+
+@subsection Options
+
+@table @option
+
+@item reference_level
+The audio reference level in dB. This specifies how many dB above the
+reference level (+4dBU) is the full range of 16 bit audio.
+Defaults to @option{0}.
+
+@item clock_video
+These specify whether video "clock" themselves.
+Defaults to @option{false}.
+
+@item clock_audio
+These specify whether audio "clock" themselves.
+Defaults to @option{false}.
+
+@end table
+
+@subsection Examples
+
+@itemize
+
+@item
+Play video clip:
+@example
+ffmpeg -i "udp://@@239.1.1.1:10480?fifo_size=1000000&overrun_nonfatal=1" -vf "scale=720:576,fps=fps=25,setdar=dar=16/9,format=pix_fmts=uyvy422" -f libndi_newtek NEW_NDI1
+@end example
+
+@end itemize
+
 @section fbdev
 
 Linux framebuffer output device.
diff --git a/libavdevice/Makefile b/libavdevice/Makefile
index 1d4e9e6..80afa61 100644
--- a/libavdevice/Makefile
+++ b/libavdevice/Makefile
@@ -19,6 +19,8 @@  OBJS-$(CONFIG_BKTR_INDEV)                += bktr.o
 OBJS-$(CONFIG_CACA_OUTDEV)               += caca.o
 OBJS-$(CONFIG_DECKLINK_OUTDEV)           += decklink_enc.o decklink_enc_c.o decklink_common.o
 OBJS-$(CONFIG_DECKLINK_INDEV)            += decklink_dec.o decklink_dec_c.o decklink_common.o
+OBJS-$(CONFIG_LIBNDI_NEWTEK_OUTDEV)      += libndi_newtek_enc.o
+OBJS-$(CONFIG_LIBNDI_NEWTEK_INDEV)       += libndi_newtek_dec.o
 OBJS-$(CONFIG_DSHOW_INDEV)               += dshow_crossbar.o dshow.o dshow_enummediatypes.o \
                                             dshow_enumpins.o dshow_filter.o \
                                             dshow_pin.o dshow_common.o
@@ -60,6 +62,8 @@  SLIBOBJS-$(HAVE_GNU_WINDRES)             += avdeviceres.o
 SKIPHEADERS                              += decklink_common.h
 SKIPHEADERS-$(CONFIG_DECKLINK)           += decklink_enc.h decklink_dec.h \
                                             decklink_common_c.h
+SKIPHEADERS-$(CONFIG_LIBNDI_NEWTEK_INDEV) += libndi_newtek_common.h
+SKIPHEADERS-$(CONFIG_LIBNDI_NEWTEK_OUTDEV) += libndi_newtek_common.h
 SKIPHEADERS-$(CONFIG_DSHOW_INDEV)        += dshow_capture.h
 SKIPHEADERS-$(CONFIG_FBDEV_INDEV)        += fbdev_common.h
 SKIPHEADERS-$(CONFIG_FBDEV_OUTDEV)       += fbdev_common.h
diff --git a/libavdevice/alldevices.c b/libavdevice/alldevices.c
index a8ed53a..8d1cb86 100644
--- a/libavdevice/alldevices.c
+++ b/libavdevice/alldevices.c
@@ -46,6 +46,7 @@  static void register_all(void)
     REGISTER_INDEV   (BKTR,             bktr);
     REGISTER_OUTDEV  (CACA,             caca);
     REGISTER_INOUTDEV(DECKLINK,         decklink);
+    REGISTER_INOUTDEV(LIBNDI_NEWTEK,    libndi_newtek);
     REGISTER_INDEV   (DSHOW,            dshow);
     REGISTER_INDEV   (DV1394,           dv1394);
     REGISTER_INOUTDEV(FBDEV,            fbdev);
diff --git a/libavdevice/libndi_newtek_common.h b/libavdevice/libndi_newtek_common.h
new file mode 100644
index 0000000..8990317
--- /dev/null
+++ b/libavdevice/libndi_newtek_common.h
@@ -0,0 +1,30 @@ 
+/*
+ * NewTek NDI common code
+ * Copyright (c) 2017 Maksym Veremeyenko
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVDEVICE_LIBNDI_NEWTEK_COMMON_H
+#define AVDEVICE_LIBNDI_NEWTEK_COMMON_H
+
+#include <Processing.NDI.Lib.h>
+
+#define NDI_TIME_BASE 10000000
+#define NDI_TIME_BASE_Q (AVRational){1, NDI_TIME_BASE}
+
+#endif
diff --git a/libavdevice/libndi_newtek_dec.c b/libavdevice/libndi_newtek_dec.c
new file mode 100644
index 0000000..51e6b3f
--- /dev/null
+++ b/libavdevice/libndi_newtek_dec.c
@@ -0,0 +1,341 @@ 
+/*
+ * Newtek NDI input
+ * Copyright (c) 2017 Maksym Veremeyenko
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavformat/avformat.h"
+#include "libavformat/internal.h"
+#include "libavutil/opt.h"
+#include "libavutil/imgutils.h"
+
+#include "libndi_newtek_common.h"
+
+struct NDIContext {
+    const AVClass *cclass;
+
+    /* Options */
+    int find_sources;
+    int64_t wait_sources;
+    int allow_video_fields;
+
+    /* Runtime */
+    NDIlib_recv_create_t *recv;
+    NDIlib_find_instance_t ndi_find;
+
+    /* Streams */
+    AVStream *video_st, *audio_st;
+};
+
+static int ndi_set_video_packet(AVFormatContext *avctx, NDIlib_video_frame_t *v, AVPacket *pkt)
+{
+    int ret;
+    struct NDIContext *ctx = avctx->priv_data;
+
+    ret = av_new_packet(pkt, v->yres * v->line_stride_in_bytes);
+    if (ret < 0)
+        return ret;
+
+    pkt->dts = pkt->pts = av_rescale_q(v->timecode, NDI_TIME_BASE_Q, ctx->video_st->time_base);
+    pkt->duration = av_rescale_q(1, (AVRational){v->frame_rate_D, v->frame_rate_N}, ctx->video_st->time_base);
+
+    av_log(avctx, AV_LOG_DEBUG, "%s: pkt->dts = pkt->pts = %"PRId64", duration=%"PRId64", timecode=%"PRId64"\n",
+        __func__, pkt->dts, pkt->duration, v->timecode);
+
+    pkt->flags         |= AV_PKT_FLAG_KEY;
+    pkt->stream_index   = ctx->video_st->index;
+
+    memcpy(pkt->data, v->p_data, pkt->size);
+
+    NDIlib_recv_free_video(ctx->recv, v);
+
+    return 0;
+}
+
+static int ndi_set_audio_packet(AVFormatContext *avctx, NDIlib_audio_frame_t *a, AVPacket *pkt)
+{
+    int ret;
+    struct NDIContext *ctx = avctx->priv_data;
+
+    NDIlib_audio_frame_interleaved_16s_t dst;
+
+    ret = av_new_packet(pkt, 2 * a->no_samples * a->no_channels);
+    if (ret < 0)
+        return ret;
+
+    pkt->dts = pkt->pts = av_rescale_q(a->timecode, NDI_TIME_BASE_Q, ctx->audio_st->time_base);
+    pkt->duration = av_rescale_q(1, (AVRational){a->no_samples, a->sample_rate}, ctx->audio_st->time_base);
+
+    av_log(avctx, AV_LOG_DEBUG, "%s: pkt->dts = pkt->pts = %"PRId64", duration=%"PRId64", timecode=%"PRId64"\n",
+        __func__, pkt->dts, pkt->duration, a->timecode);
+
+    pkt->flags       |= AV_PKT_FLAG_KEY;
+    pkt->stream_index = ctx->audio_st->index;
+
+    dst.reference_level = 0;
+    dst.p_data = (short *)pkt->data;
+    NDIlib_util_audio_to_interleaved_16s(a, &dst);
+
+    NDIlib_recv_free_audio(ctx->recv, a);
+
+    return 0;
+}
+
+static int ndi_find_sources(AVFormatContext *avctx, const char *name, NDIlib_source_t *source_to_connect_to)
+{
+    int j = AVERROR(ENODEV);
+    unsigned int n, i;
+    struct NDIContext *ctx = avctx->priv_data;
+    const NDIlib_source_t *ndi_srcs = NULL;
+    const NDIlib_find_create_t find_create_desc = { .show_local_sources = true,
+        .p_groups = NULL, .p_extra_ips = NULL };
+
+    if (!ctx->ndi_find)
+        ctx->ndi_find = NDIlib_find_create2(&find_create_desc);
+    if (!ctx->ndi_find) {
+        av_log(avctx, AV_LOG_ERROR, "NDIlib_find_create failed.\n");
+        return AVERROR(EIO);
+    }
+
+    while (1)
+    {
+        int f, t = ctx->wait_sources / 1000;
+        av_log(avctx, AV_LOG_DEBUG, "Waiting for sources %d miliseconds\n", t);
+        f = NDIlib_find_wait_for_sources(ctx->ndi_find, t);
+        av_log(avctx, AV_LOG_DEBUG, "NDIlib_find_wait_for_sources returns %d\n", f);
+        if (!f)
+            break;
+    };
+
+    ndi_srcs = NDIlib_find_get_current_sources(ctx->ndi_find, &n);
+
+    if (ctx->find_sources)
+        av_log(avctx, AV_LOG_INFO, "Found %d NDI sources:\n", n);
+
+    for (i = 0; i < n; i++) {
+        if (ctx->find_sources)
+            av_log(avctx, AV_LOG_INFO, "\t'%s'\t'%s'\n", ndi_srcs[i].p_ndi_name, ndi_srcs[i].p_ip_address);
+
+        if (!strcmp(name, ndi_srcs[i].p_ndi_name)) {
+            *source_to_connect_to = ndi_srcs[i];
+            j = i;
+        }
+    }
+
+    return j;
+}
+
+static int ndi_read_header(AVFormatContext *avctx)
+{
+    int ret;
+    NDIlib_recv_create_t recv_create_desc;
+    const NDIlib_tally_t tally_state = { .on_program = true, .on_preview = false };
+    struct NDIContext *ctx = avctx->priv_data;
+
+    if (!NDIlib_initialize()) {
+        av_log(avctx, AV_LOG_ERROR, "NDIlib_initialize failed.\n");
+        return AVERROR_EXTERNAL;
+    }
+
+    /* Find available sources. */
+    ret = ndi_find_sources(avctx, avctx->filename, &recv_create_desc.source_to_connect_to);
+    if (ctx->find_sources) {
+        return AVERROR_EXIT;
+    }
+    if (ret < 0)
+        return ret;
+
+    /* Create receiver description */
+    recv_create_desc.color_format = NDIlib_recv_color_format_e_UYVY_RGBA;
+    recv_create_desc.bandwidth = NDIlib_recv_bandwidth_highest;
+    recv_create_desc.allow_video_fields = ctx->allow_video_fields;
+
+    /* Create the receiver */
+    ctx->recv = NDIlib_recv_create2(&recv_create_desc);
+    if (!ctx->recv) {
+        av_log(avctx, AV_LOG_ERROR, "NDIlib_recv_create2 failed.\n");
+        return AVERROR(EIO);
+    }
+
+    /* Set tally */
+    NDIlib_recv_set_tally(ctx->recv, &tally_state);
+
+    avctx->ctx_flags |= AVFMTCTX_NOHEADER;
+
+    return 0;
+}
+
+static int ndi_create_video_stream(AVFormatContext *avctx, NDIlib_video_frame_t *v)
+{
+    AVStream *st;
+    AVRational tmp;
+    struct NDIContext *ctx = avctx->priv_data;
+
+    st = avformat_new_stream(avctx, NULL);
+    if (!st) {
+        av_log(avctx, AV_LOG_ERROR, "Cannot add video stream\n");
+        return AVERROR(ENOMEM);
+    }
+
+    st->time_base                   = NDI_TIME_BASE_Q;
+    av_stream_set_r_frame_rate(st, av_make_q(v->frame_rate_N, v->frame_rate_D));
+
+    tmp = av_mul_q(av_d2q(v->picture_aspect_ratio, INT_MAX), (AVRational){v->yres, v->xres});
+    av_reduce(&st->sample_aspect_ratio.num, &st->sample_aspect_ratio.den, tmp.num, tmp.den, 1000);
+    st->codecpar->sample_aspect_ratio = st->sample_aspect_ratio;
+
+    st->codecpar->codec_type        = AVMEDIA_TYPE_VIDEO;
+    st->codecpar->width             = v->xres;
+    st->codecpar->height            = v->yres;
+    st->codecpar->codec_id          = AV_CODEC_ID_RAWVIDEO;
+    st->codecpar->bit_rate          = av_rescale(v->xres * v->yres * 16, v->frame_rate_N, v->frame_rate_D);
+    st->codecpar->field_order       = v->frame_format_type == NDIlib_frame_format_type_progressive
+        ? AV_FIELD_PROGRESSIVE : AV_FIELD_TT;
+
+    if (NDIlib_FourCC_type_UYVY == v->FourCC || NDIlib_FourCC_type_UYVA == v->FourCC) {
+        st->codecpar->format        = AV_PIX_FMT_UYVY422;
+        st->codecpar->codec_tag     = MKTAG('U', 'Y', 'V', 'Y');
+    } else if (NDIlib_FourCC_type_BGRA == v->FourCC) {
+        st->codecpar->format        = AV_PIX_FMT_BGRA;
+        st->codecpar->codec_tag     = MKTAG('B', 'G', 'R', 'A');
+    } else if (NDIlib_FourCC_type_BGRX == v->FourCC) {
+        st->codecpar->format        = AV_PIX_FMT_BGR0;
+        st->codecpar->codec_tag     = MKTAG('B', 'G', 'R', '0');
+    } else if (NDIlib_FourCC_type_RGBA == v->FourCC) {
+        st->codecpar->format        = AV_PIX_FMT_RGBA;
+        st->codecpar->codec_tag     = MKTAG('R', 'G', 'B', 'A');
+    } else if (NDIlib_FourCC_type_RGBX == v->FourCC) {
+        st->codecpar->format        = AV_PIX_FMT_RGB0;
+        st->codecpar->codec_tag     = MKTAG('R', 'G', 'B', '0');
+    } else {
+        av_log(avctx, AV_LOG_ERROR, "Unsupported video stream format, v->FourCC=%d\n", v->FourCC);
+        return AVERROR(EINVAL);
+    }
+
+    avpriv_set_pts_info(st, 64, 1, NDI_TIME_BASE);
+
+    ctx->video_st = st;
+
+    return 0;
+}
+
+static int ndi_create_audio_stream(AVFormatContext *avctx, NDIlib_audio_frame_t *a)
+{
+    AVStream *st;
+    struct NDIContext *ctx = avctx->priv_data;
+
+    st = avformat_new_stream(avctx, NULL);
+    if (!st) {
+        av_log(avctx, AV_LOG_ERROR, "Cannot add audio stream\n");
+        return AVERROR(ENOMEM);
+    }
+
+    st->codecpar->codec_type        = AVMEDIA_TYPE_AUDIO;
+    st->codecpar->codec_id          = AV_CODEC_ID_PCM_S16LE;
+    st->codecpar->sample_rate       = a->sample_rate;
+    st->codecpar->channels          = a->no_channels;
+
+    avpriv_set_pts_info(st, 64, 1, NDI_TIME_BASE);
+
+    ctx->audio_st = st;
+
+    return 0;
+}
+
+static int ndi_read_packet(AVFormatContext *avctx, AVPacket *pkt)
+{
+    int ret = 0;
+    struct NDIContext *ctx = avctx->priv_data;
+
+    while (1) {
+        NDIlib_video_frame_t v;
+        NDIlib_audio_frame_t a;
+        NDIlib_metadata_frame_t m;
+        NDIlib_frame_type_e t;
+
+        t = NDIlib_recv_capture(ctx->recv, &v, &a, &m, 40);
+
+        if (NDIlib_frame_type_video == t) {
+            if (!ctx->video_st) {
+                ret = ndi_create_video_stream(avctx, &v);
+                if (ret < 0)
+                    return ret;
+            }
+            ret = ndi_set_video_packet(avctx, &v, pkt);
+            break;
+        }
+        else if (NDIlib_frame_type_audio == t) {
+            if (!ctx->audio_st) {
+                ret = ndi_create_audio_stream(avctx, &a);
+                if (ret < 0)
+                    return ret;
+            }
+            ret = ndi_set_audio_packet(avctx, &a, pkt);
+            break;
+        }
+        else if (NDIlib_frame_type_metadata == t)
+            NDIlib_recv_free_metadata(ctx->recv, &m);
+        else if (NDIlib_frame_type_none != t){
+            av_log(avctx, AV_LOG_ERROR, "NDIlib_recv_capture returns %d\n", t);
+        }
+    };
+
+    return ret;
+}
+
+static int ndi_read_close(AVFormatContext *avctx)
+{
+    struct NDIContext *ctx = (struct NDIContext *)avctx->priv_data;
+
+    if (ctx->recv)
+        NDIlib_recv_destroy(ctx->recv);
+
+    if (ctx->ndi_find)
+        NDIlib_find_destroy(ctx->ndi_find);
+
+    return 0;
+}
+
+#define OFFSET(x) offsetof(struct NDIContext, x)
+#define DEC AV_OPT_FLAG_DECODING_PARAM
+
+static const AVOption options[] = {
+    { "find_sources", "Find available sources"  , OFFSET(find_sources), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, DEC },
+    { "wait_sources", "Time to wait until the number of online sources have changed"  , OFFSET(wait_sources), AV_OPT_TYPE_DURATION, { .i64 = 1000000 }, 100000, 20000000, DEC },
+    { "allow_video_fields", "When this flag is FALSE, all video that you receive will be progressive"  , OFFSET(allow_video_fields), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, DEC },
+    { NULL },
+};
+
+static const AVClass libndi_newtek_demuxer_class = {
+    .class_name = "NDI demuxer",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+    .category   = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
+};
+
+AVInputFormat ff_libndi_newtek_demuxer = {
+    .name           = "libndi_newtek",
+    .long_name      = NULL_IF_CONFIG_SMALL("Network Device Interface (NDI) input using NewTek library"),
+    .flags          = AVFMT_NOFILE,
+    .priv_class     = &libndi_newtek_demuxer_class,
+    .priv_data_size = sizeof(struct NDIContext),
+    .read_header   = ndi_read_header,
+    .read_packet   = ndi_read_packet,
+    .read_close    = ndi_read_close,
+};
diff --git a/libavdevice/libndi_newtek_enc.c b/libavdevice/libndi_newtek_enc.c
new file mode 100644
index 0000000..db64306
--- /dev/null
+++ b/libavdevice/libndi_newtek_enc.c
@@ -0,0 +1,305 @@ 
+/*
+ * NewTek NDI output
+ * Copyright (c) 2017 Maksym Veremeyenko
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavformat/avformat.h"
+#include "libavformat/internal.h"
+#include "libavutil/opt.h"
+#include "libavutil/imgutils.h"
+
+#include "libndi_newtek_common.h"
+
+struct NDIContext {
+    const AVClass *cclass;
+
+    /* Options */
+    int reference_level;
+    int clock_video, clock_audio;
+
+    NDIlib_video_frame_t *video;
+    NDIlib_audio_frame_interleaved_16s_t *audio;
+    NDIlib_send_instance_t ndi_send;
+    AVFrame *last_avframe;
+};
+
+static int ndi_write_trailer(AVFormatContext *avctx)
+{
+    struct NDIContext *ctx = avctx->priv_data;
+
+    if (ctx->ndi_send) {
+        NDIlib_send_destroy(ctx->ndi_send);
+
+        if (ctx->last_avframe)
+            av_frame_free(&ctx->last_avframe);
+    }
+
+    if (ctx->video)
+        av_freep(&ctx->video);
+
+    if (ctx->audio)
+        av_freep(&ctx->audio);
+
+    return 0;
+}
+
+static int ndi_write_video_packet(AVFormatContext *avctx, AVStream *st, AVPacket *pkt)
+{
+    struct NDIContext *ctx = avctx->priv_data;
+    AVFrame *avframe, *tmp = (AVFrame *)pkt->data;
+
+    if (tmp->format != AV_PIX_FMT_UYVY422 && tmp->format != AV_PIX_FMT_BGRA &&
+        tmp->format != AV_PIX_FMT_BGR0 && tmp->format != AV_PIX_FMT_RGBA &&
+        tmp->format != AV_PIX_FMT_RGB0) {
+        av_log(avctx, AV_LOG_ERROR, "Got a frame with invalid pixel format.\n");
+        return AVERROR(EINVAL);
+    }
+
+    if (tmp->linesize[0] < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Got a frame with negative linesize.\n");
+        return AVERROR(EINVAL);
+    }
+
+    if (tmp->width  != ctx->video->xres ||
+        tmp->height != ctx->video->yres) {
+        av_log(avctx, AV_LOG_ERROR, "Got a frame with invalid dimension.\n");
+        av_log(avctx, AV_LOG_ERROR, "tmp->width=%d, tmp->height=%d, ctx->video->xres=%d, ctx->video->yres=%d\n",
+            tmp->width, tmp->height, ctx->video->xres, ctx->video->yres);
+        return AVERROR(EINVAL);
+    }
+
+    avframe = av_frame_clone(tmp);
+    if (!avframe)
+        return AVERROR(ENOMEM);
+
+    ctx->video->timecode = av_rescale_q(pkt->pts, st->time_base, NDI_TIME_BASE_Q);
+
+    ctx->video->line_stride_in_bytes = avframe->linesize[0];
+    ctx->video->p_data = (void *)(avframe->data[0]);
+
+    av_log(avctx, AV_LOG_DEBUG, "%s: pkt->pts=%"PRId64", timecode=%"PRId64", st->time_base=%d/%d\n",
+        __func__, pkt->pts, ctx->video->timecode, st->time_base.num, st->time_base.den);
+
+    /* asynchronous for one frame, but will block if a second frame
+        is given before the first one has been sent */
+    NDIlib_send_send_video_async(ctx->ndi_send, ctx->video);
+
+    if (ctx->last_avframe)
+        av_frame_free(&ctx->last_avframe);
+    ctx->last_avframe = avframe;
+
+    return 0;
+}
+
+static int ndi_write_audio_packet(AVFormatContext *avctx, AVStream *st, AVPacket *pkt)
+{
+    struct NDIContext *ctx = avctx->priv_data;
+
+    ctx->audio->p_data = (short *)pkt->data;
+    ctx->audio->timecode = av_rescale_q(pkt->pts, st->time_base, NDI_TIME_BASE_Q);
+    ctx->audio->no_samples = pkt->size / (ctx->audio->no_channels << 1);
+
+    av_log(avctx, AV_LOG_DEBUG, "%s: pkt->pts=%"PRId64", timecode=%"PRId64", st->time_base=%d/%d\n",
+        __func__, pkt->pts, ctx->video->timecode, st->time_base.num, st->time_base.den);
+
+    NDIlib_util_send_send_audio_interleaved_16s(ctx->ndi_send, ctx->audio);
+
+    return 0;
+}
+
+static int ndi_write_packet(AVFormatContext *avctx, AVPacket *pkt)
+{
+    AVStream *st = avctx->streams[pkt->stream_index];
+
+    if      (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
+        return ndi_write_video_packet(avctx, st, pkt);
+    else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
+        return ndi_write_audio_packet(avctx, st, pkt);
+
+    return AVERROR_BUG;
+}
+
+static int ndi_setup_audio(AVFormatContext *avctx, AVStream *st)
+{
+    struct NDIContext *ctx = avctx->priv_data;
+    AVCodecParameters *c = st->codecpar;
+
+    if (ctx->audio) {
+        av_log(avctx, AV_LOG_ERROR, "Only one audio stream is supported!\n");
+        return AVERROR(EINVAL);
+    }
+
+    ctx->audio = av_mallocz(sizeof(NDIlib_audio_frame_interleaved_16s_t));
+    if (!ctx->audio)
+        return AVERROR(ENOMEM);
+
+    ctx->audio->sample_rate = c->sample_rate;
+    ctx->audio->no_channels = c->channels;
+    ctx->audio->reference_level = ctx->reference_level;
+
+    avpriv_set_pts_info(st, 64, 1, NDI_TIME_BASE);
+
+    return 0;
+}
+
+static int ndi_setup_video(AVFormatContext *avctx, AVStream *st)
+{
+    struct NDIContext *ctx = avctx->priv_data;
+    AVCodecParameters *c = st->codecpar;
+
+    if (ctx->video) {
+        av_log(avctx, AV_LOG_ERROR, "Only one video stream is supported!\n");
+        return AVERROR(EINVAL);
+    }
+
+    if (c->codec_id != AV_CODEC_ID_WRAPPED_AVFRAME) {
+        av_log(avctx, AV_LOG_ERROR, "Unsupported codec format!"
+               " Only AV_CODEC_ID_WRAPPED_AVFRAME is supported (-vcodec wrapped_avframe).\n");
+        return AVERROR(EINVAL);
+    }
+
+    if (c->format != AV_PIX_FMT_UYVY422 && c->format != AV_PIX_FMT_BGRA &&
+        c->format != AV_PIX_FMT_BGR0 && c->format != AV_PIX_FMT_RGBA &&
+        c->format != AV_PIX_FMT_RGB0) {
+        av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format!"
+               " Only AV_PIX_FMT_UYVY422, AV_PIX_FMT_BGRA, AV_PIX_FMT_BGR0,"
+               " AV_PIX_FMT_RGBA, AV_PIX_FMT_RGB0 is supported.\n");
+        return AVERROR(EINVAL);
+    }
+
+    if (c->field_order == AV_FIELD_BB || c->field_order == AV_FIELD_BT) {
+        av_log(avctx, AV_LOG_ERROR, "Lower field-first disallowed");
+        return AVERROR(EINVAL);
+    }
+
+    ctx->video = av_mallocz(sizeof(NDIlib_video_frame_t));
+    if (!ctx->video)
+        return AVERROR(ENOMEM);
+
+    switch(c->format) {
+        case AV_PIX_FMT_UYVY422:
+            ctx->video->FourCC = NDIlib_FourCC_type_UYVY;
+            break;
+        case AV_PIX_FMT_BGRA:
+            ctx->video->FourCC = NDIlib_FourCC_type_BGRA;
+            break;
+        case AV_PIX_FMT_BGR0:
+            ctx->video->FourCC = NDIlib_FourCC_type_BGRX;
+            break;
+        case AV_PIX_FMT_RGBA:
+            ctx->video->FourCC = NDIlib_FourCC_type_RGBA;
+            break;
+        case AV_PIX_FMT_RGB0:
+            ctx->video->FourCC = NDIlib_FourCC_type_RGBX;
+            break;
+    }
+
+    ctx->video->xres = c->width;
+    ctx->video->yres = c->height;
+    ctx->video->frame_rate_N = st->avg_frame_rate.num;
+    ctx->video->frame_rate_D = st->avg_frame_rate.den;
+    ctx->video->frame_format_type = c->field_order == AV_FIELD_PROGRESSIVE
+        ? NDIlib_frame_format_type_progressive
+        : NDIlib_frame_format_type_interleaved;
+
+    if (st->sample_aspect_ratio.num) {
+        AVRational display_aspect_ratio;
+        av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
+                  st->codecpar->width  * (int64_t)st->sample_aspect_ratio.num,
+                  st->codecpar->height * (int64_t)st->sample_aspect_ratio.den,
+                  1024 * 1024);
+        ctx->video->picture_aspect_ratio = av_q2d(display_aspect_ratio);
+    }
+    else
+        ctx->video->picture_aspect_ratio = (double)st->codecpar->width/st->codecpar->height;
+
+    avpriv_set_pts_info(st, 64, 1, NDI_TIME_BASE);
+
+    return 0;
+}
+
+static int ndi_write_header(AVFormatContext *avctx)
+{
+    int ret = 0;
+    unsigned int n;
+    struct NDIContext *ctx = avctx->priv_data;
+    const NDIlib_send_create_t ndi_send_desc = { .p_ndi_name = avctx->filename,
+        .p_groups = NULL, .clock_video = ctx->clock_video, .clock_audio = ctx->clock_audio };
+
+    if (!NDIlib_initialize()) {
+        av_log(avctx, AV_LOG_ERROR, "NDIlib_initialize failed.\n");
+        return AVERROR_EXTERNAL;
+    }
+
+    /* check if streams compatible */
+    for (n = 0; n < avctx->nb_streams; n++) {
+        AVStream *st = avctx->streams[n];
+        AVCodecParameters *c = st->codecpar;
+        if        (c->codec_type == AVMEDIA_TYPE_AUDIO) {
+            if ((ret = ndi_setup_audio(avctx, st)))
+                goto error;
+        } else if (c->codec_type == AVMEDIA_TYPE_VIDEO) {
+            if ((ret = ndi_setup_video(avctx, st)))
+                goto error;
+        } else {
+            av_log(avctx, AV_LOG_ERROR, "Unsupported stream type.\n");
+            ret = AVERROR(EINVAL);
+            goto error;
+        }
+    }
+
+    ctx->ndi_send = NDIlib_send_create(&ndi_send_desc);
+    if (!ctx->ndi_send) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to create NDI output %s\n", avctx->filename);
+        ret = AVERROR_EXTERNAL;
+    }
+
+error:
+    return ret;
+}
+
+#define OFFSET(x) offsetof(struct NDIContext, x)
+static const AVOption options[] = {
+    { "reference_level", "The audio reference level in dB"  , OFFSET(reference_level), AV_OPT_TYPE_INT, { .i64 = 0 }, -20, 20, AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM},
+    { "clock_video", "These specify whether video 'clock' themselves"  , OFFSET(clock_video), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM },
+    { "clock_audio", "These specify whether audio 'clock' themselves"  , OFFSET(clock_audio), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM },
+    { NULL },
+};
+
+static const AVClass libndi_newtek_muxer_class = {
+    .class_name = "NDI muxer",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+    .category   = AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT,
+};
+
+AVOutputFormat ff_libndi_newtek_muxer = {
+    .name           = "libndi_newtek",
+    .long_name      = NULL_IF_CONFIG_SMALL("Network Device Interface (NDI) output using NewTek library"),
+    .audio_codec    = AV_CODEC_ID_PCM_S16LE,
+    .video_codec    = AV_CODEC_ID_WRAPPED_AVFRAME,
+    .subtitle_codec = AV_CODEC_ID_NONE,
+    .flags          = AVFMT_NOFILE,
+    .priv_class     = &libndi_newtek_muxer_class,
+    .priv_data_size = sizeof(struct NDIContext),
+    .write_header   = ndi_write_header,
+    .write_packet   = ndi_write_packet,
+    .write_trailer  = ndi_write_trailer,
+};
diff --git a/libavdevice/version.h b/libavdevice/version.h
index 0c06602..948e4e1 100644
--- a/libavdevice/version.h
+++ b/libavdevice/version.h
@@ -28,7 +28,7 @@ 
 #include "libavutil/version.h"
 
 #define LIBAVDEVICE_VERSION_MAJOR  57
-#define LIBAVDEVICE_VERSION_MINOR   7
+#define LIBAVDEVICE_VERSION_MINOR   8
 #define LIBAVDEVICE_VERSION_MICRO 100
 
 #define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \
-- 
1.8.3.1