@@ -437,6 +437,20 @@ static int filter_frame(AVFilterLink *link, AVFrame *in)
return ret;
}
+ // just to show how a filter fills the ROI info
+ size_t nb_rois = 1;
+ AVFrameSideData *sd = av_frame_new_side_data(in, AV_FRAME_DATA_ROIS, nb_rois * sizeof(AVROI));
+ if (!sd) {
+ av_frame_free(&in);
+ return AVERROR(ENOMEM);
+ }
+ AVROI* rois = (AVROI*)sd->data;
+ rois[0].top = 0;
+ rois[0].left = 0;
+ rois[0].bottom = in->height;
+ rois[0].right = in->width/2;
+ rois[0].qoffset = -15;
+
if (!scale->sws)
return ff_filter_frame(outlink, in);
This patchset contains two patches. - the first patch finished the code and ask for upstreaming. - the second patch (this patch) is just a quick example and not ask for upstreaming. to verify it, the command line looks like: ./ffmpeg -i .../path_to_1920x1080_video_file -vf scale=1920:1080 -c:v libx264 -b:v 2000k -y tmp.264 Signed-off-by: Guo, Yejun <yejun.guo@intel.com> --- libavfilter/vf_scale.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)