But using framerate to calculate time_base is also an error, you can try transcoding this video: https://drive.google.com/file/d/1bOV90UP61GbSAyzgsfzBZAOU_9feLPpm/view?usp=sharing
On Sun, Mar 14, 2021 at 7:14 PM Anton Khirnov <an...@khirnov.net> wrote: > Quoting Donough Liu (2021-03-12 18:47:09) > > Set time_base to inv of frame rate is only valid when input video have > fixed frame rate. > > > > Signed-off-by: Donough Liu <donough...@gmail.com> > > --- > > doc/examples/transcoding.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/doc/examples/transcoding.c b/doc/examples/transcoding.c > > index 5aff08c135..d6fed63421 100644 > > --- a/doc/examples/transcoding.c > > +++ b/doc/examples/transcoding.c > > @@ -170,7 +170,7 @@ static int open_output_file(const char *filename) > > else > > enc_ctx->pix_fmt = dec_ctx->pix_fmt; > > /* video time_base can be set to whatever is handy and > supported by encoder */ > > - enc_ctx->time_base = av_inv_q(dec_ctx->framerate); > > + enc_ctx->time_base = dec_ctx->time_base; > > This is wrong, the use of time_base for decoding is deprecated. > > -- > Anton Khirnov > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
