Here's my
situation. I have cut and re-encoded multiple MPEG-2
PS (Program Stream) files recorded from HDTV without
fail. However, I have this one file that will always
play properly in my software player. But when the
file is demuxed, it has an audio track that is 6
seconds longer than the video. I have tried doing
all the GOP fixing, and it hasn't changed this
result. What I don't get is how an MPEG player see
the audio as being the proper length and play
through the muxed file with perfect audio and video
synchronization.
Is there any way I can "fool" MPEG Video Wizard into
demuxing it like a decoder would? Or another way
around this that I am missing? This seems like such
a silly problem, but I cannot get the demuxed audio
and video to match in length.
The reason for the
different lengths is that the demuxed video and
audio have all lost their relative playing time
arrangement as encoded in the time stamps of a
multiplexed file. Also lost with demuxed files is
the ability of hiding data errors incurred during
the process of a hardware recording. If the
demuxed video and audio files can still be played in
synchronization, you could simply cut a small part
at the end of one file to make them the same length.
Otherwise, it's better keep the video and audio in
a multiplexed file at all times. |
