@@ -253,6 +253,7 @@ typedef struct OptionsContext {
enum IFilterFlags {
IFILTER_FLAG_AUTOROTATE = (1 << 0),
IFILTER_FLAG_REINIT = (1 << 1),
+ IFILTER_FLAG_CFR = (1 << 2),
};
typedef struct InputFilterOptions {
@@ -261,6 +262,13 @@ typedef struct InputFilterOptions {
uint8_t *name;
+ /* When IFILTER_FLAG_CFR is set, the stream is guaranteed to be CFR with
+ * this framerate.
+ *
+ * Otherwise, this is an estimate that should not be relied upon to be
+ * accurate */
+ AVRational framerate;
+
int sub2video_width;
int sub2video_height;
@@ -365,8 +373,6 @@ typedef struct InputStream {
Decoder *decoder;
const AVCodec *dec;
- AVRational framerate_guessed;
-
/* framerate forced with -r */
AVRational framerate;
#if FFMPEG_OPT_TOP
@@ -992,7 +992,13 @@ int ist_filter_add(InputStream *ist, InputFilter *ifilter, int is_simple,
if (ret < 0)
return ret;
- if (ist->par->codec_type == AVMEDIA_TYPE_SUBTITLE) {
+ if (ist->par->codec_type == AVMEDIA_TYPE_VIDEO) {
+ if (ist->framerate.num > 0 && ist->framerate.den > 0) {
+ opts->framerate = ist->framerate;
+ opts->flags |= IFILTER_FLAG_CFR;
+ } else
+ opts->framerate = av_guess_frame_rate(d->f.ctx, ist->st, NULL);
+ } else if (ist->par->codec_type == AVMEDIA_TYPE_SUBTITLE) {
/* Compute the size of the canvas for the subtitles stream.
If the subtitles codecpar has set a size, use it. Otherwise use the
maximum dimensions of the video streams in the same file. */
@@ -1359,8 +1365,6 @@ static int ist_add(const OptionsContext *o, Demuxer *d, AVStream *st)
MATCH_PER_STREAM_OPT(top_field_first, i, ist->top_field_first, ic, st);
#endif
- ist->framerate_guessed = av_guess_frame_rate(ic, st, NULL);
-
break;
case AVMEDIA_TYPE_AUDIO: {
int guess_layout_max = INT_MAX;
@@ -1486,7 +1486,7 @@ static int configure_input_video_filter(FilterGraph *fg, AVFilterGraph *graph,
const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
const AVPixFmtDescriptor *desc;
InputStream *ist = ifp->ist;
- AVRational fr = ist->framerate;
+ AVRational fr = ifp->opts.framerate;
AVRational sar;
AVBPrint args;
char name[255];
@@ -1495,14 +1495,11 @@ static int configure_input_video_filter(FilterGraph *fg, AVFilterGraph *graph,
if (!par)
return AVERROR(ENOMEM);
- if (!fr.num)
- fr = ist->framerate_guessed;
-
if (ifp->type_src == AVMEDIA_TYPE_SUBTITLE)
sub2video_prepare(ifp);
- ifp->time_base = ist->framerate.num ? av_inv_q(ist->framerate) :
- ist->st->time_base;
+ ifp->time_base = (ifp->opts.flags & IFILTER_FLAG_CFR) ?
+ av_inv_q(ifp->opts.framerate) : ist->st->time_base;
sar = ifp->sample_aspect_ratio;
if(!sar.den)