[MPlayer-dev-eng] PCR Setting in MPEG TS muxer

[Todd Huang]

Hi: I am trying to use the mplayer to stream out the encoded data (H.264 video + MPEG-4AAC audio muxed in TS foramt) captured from the TV tuner card plugged in the PC over thenetwork. By analyzing the PCR value in the PES packets, I found that it was the same as the PTS.By checking the source code of mpegtsenc.c in the folder of libavformat, I found its valuewas fixed to be equal to the value of PTS. According to the equations of 2-1 in ISO13818-1, PCR(i) = PCR_base(i) * 300 + PCR_ext(i)  Can anyone tell me where can I find the source code that correctly implements the PCRsetting? By the way, is the PCR value essential to the software player? I know the hardware playeruses the PCR to recover the timing of the encoder. How is the PCR used by the softwareplayer? I also noticed that the mplayer utility could play image smoothly even if there wasno PCR value. However, VLC failed to play image if there was no PCR value. Could anyoneknow the reason? Is there any relation between the PCR value and the PTS/DTS value? I couldn't find anystatement in ISO13818-1 mentioning their relationship (please correct me if I am wrong).However, VLC fails to play the image if the difference between the PCR and the PTS isbigger than some limitation. Thanks.
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