[FFmpeg-devel] [PATCH 02/13] fftools/ffmpeg: fix computing video frame duration from repeat_pict
Anton Khirnov
anton at khirnov.net
Sun May 7 16:32:44 EEST 2023
This field contains the number of _field_ durations by which the
standard frame duration should be extended.
---
fftools/ffmpeg.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
index 8323c32ffd..4e45ab74b9 100644
--- a/fftools/ffmpeg.c
+++ b/fftools/ffmpeg.c
@@ -1008,10 +1008,10 @@ static int64_t video_duration_estimate(const InputStream *ist, const AVFrame *fr
return frame->duration;
if (ist->dec_ctx->framerate.den && ist->dec_ctx->framerate.num) {
- int ticks = frame->repeat_pict >= 0 ?
- frame->repeat_pict + 1 :
- ist->dec_ctx->ticks_per_frame;
- codec_duration = av_rescale_q(ticks, av_inv_q(ist->dec_ctx->framerate),
+ int fields = frame->repeat_pict + 2;
+ AVRational field_rate = av_mul_q(ist->dec_ctx->framerate,
+ (AVRational){ 2, 1 });
+ codec_duration = av_rescale_q(fields, av_inv_q(field_rate),
ist->st->time_base);
}
--
2.39.2
More information about the ffmpeg-devel
mailing list