Thanks Vassilis that's awesome, it worked, I just had to get the frame rate from the decoder context but now this fps problem was fixed thanks to you (and James) <https://github.com/leandromoreira/ffmpeg-libav-tutorial/pull/52#issuecomment-569503206>. I still need to figure it out how to fix all the other issues <https://github.com/leandromoreira/ffmpeg-libav-tutorial/pull/52>.
On Sun, Dec 29, 2019 at 3:06 AM Vassilis <[email protected]> wrote: > 3) After I transcoded with my code >> <https://github.com/leandromoreira/ffmpeg-libav-tutorial/blob/transcoding/2_transcoding.c> >> I'm getting a 60.11 fps while the original video has fixed 60fps, why this >> usually happens? >> >> While I am not able to .help you with the two first issues I think I may > have an idea for the third. This seems like an issue I faced with my own > attempt at transcoding video and a fix was suggested by a member of this > mailing list (thanks James). You need to set the AVPacket duration field, > otherwise this issue is present. This would mean adding something in the > lines of the following line of code before your av_interleaved_write_frame > is called: > > // for example, if 25 FPS, and time_base is 12800, then packet.duration = > 12800 / 25 = 512 > output_packet.duration = > format_context->streams[stream_index]->time_base.den / > format_context->streams[stream_index]->time_base.num / > format_context->streams[stream_index]->avg_frame_rate.num * > format_context->streams[stream_index]->avg_frame_rate.den; > > /* mux encoded frame */ > ret = av_interleaved_write_frame(format_context, output_packet); > > Hope this helps! > > Vas > > > > _______________________________________________ > Libav-user mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/libav-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe".
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