2011/10/28 RichardP <[email protected]>: > Hi all, > > I am trying to stream video from a stream and am having difficulty with > PTS/DTS ... I just dont know where it is to be set is the simple question. > > I decode a video stream (DVB) and stream only the video and it works > perfectly... when I add the audio I get the errors below and am a bit lost > where things have got lost. > > I encode the same AVFrame that was returned by the _decode() function.. is > this incorrect? (the video works) .. the Audio samples are encoded (but I > assume there is no PTS information contained) > > Any hints to make this work.. as searching has shown many solutions that I > really don't understand and what needs to be done. > > Best Regards, > Richard > > > [mpegts @ 0x24e5c00] Application provided invalid, non monotonically > increasing dts to muxer in stream 0: 475200 >= -9223372036854775808 > [ 16:20:48 ] Pts/Dts -> 5640178740/5640178740 > [mpegts @ 0x24e5c00] Application provided invalid, non monotonically > increasing dts to muxer in stream 0: 475200 >= -9223372036854775808 > [ 16:20:48 ] Pts/Dts -> 5640180900/5640180900 > [mpegts @ 0x24e5c00] Application provided invalid, non monotonically > increasing dts to muxer in stream 0: 475200 >= -9223372036854775808
It could be better if you provide us with your sources and media sample. Regarding audio transcoding and timestamping, recently i have been enlighted by Justin Ruggles at #libav IRC channel: http://pastebin.com/Kk7UX7qw You should put decoded audio data to fifo, read it by (encoder's frame_size)*num_channels*(av_get_bytes_per_sample(sample_fmt)) from there, encode it, and calculate PTS by continuously increasing it by delta. Delta is to be calculated in this way: delta = (encoder frame_size) * (out format time_base, for mpegts its 1/90000 ) / (encoder sample_rate) The example of this is present in my code: https://github.com/krieger-od/transcoder/blob/379ad41d5da32588d588a9640b9517fcff31647d/transcoder.c#L509 -- Andrey Utkin _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
