I have also noticed the same issue. It seems that for 264 raw encoded stream (without any container), ffmpeg can correctly understand fps and tbr, but doubles the tbc (I assume it is the container frame rate, may not be correct). That's why ffmpeg plays the 264 raw video twice the frame rate as expected. I am also looking for a way to solve this issue.
Zixia ---- Original message ---- >Date: Mon, 16 Aug 2010 16:32:17 -0400 >From: Ke Yu <[email protected]> >Subject: [libav-user] frame rate of encoded h.264 in mpegts doubled when being >played back >To: "Libav* user questions and discussions" <[email protected]> > >I ran into an issue when encoding H.264 stream and mux it into mpegts: > >This is how I specified the frame rate which is supposed to be 15 fps: >AVCodecContext *c; >... >c->time_base.den = 15; >c->time_base.num = 1; >And my AVStream time base is: >AVStream st; >... >st->time_base.den = 90000; >st->time_base.num = 1; > >But when playing the stream back, my video analyzer reported 30 fps >which doubled my initial configuration. Is there anything else I >should pay attention to or is it a bug in the libavformat's mpeg-ts >muxer? > >Thanks! >_______________________________________________ >libav-user mailing list >[email protected] >https://lists.mplayerhq.hu/mailman/listinfo/libav-user _______________________________________________ libav-user mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/libav-user
