toolman2k
31st May 2003, 22:40
Hi all,
Ive been fiddling with putting 24 season 2 tv series vcd's on dvd.In the basics its very easy, just convert the audio and put it all together.
But just like many others i ran into sync issues.This was due to the original MPEGs being edited, commercial cuts etc.That is what screws up the mpeg stream.
when demuxing and muxing again (with just the audio upsampled) you'll get sync issues no doubt.
I tried and tried many ways and tools.but no luck.read nice guides here and there about this topic.no luck.
the problem is this: the original mpeg plays fine.....but if you look closely you'll see that the video sometimes glitches due to the editing the groups do.this is no problem since the video skips a few frames to stay in sync with the audio (or something like it).but as soon as you seperate the audio and convert and put it back...it looses the sync.
i tried to convert the whole mpeg1 stream to mpeg2(incl.48k audio) in tmpegenc plus.which indeed solved the sync issue.sure some quality loss but not that noticible.the only thing now is that the video does not skip at the "cutting" points but a very short silence is in the audio, like a short pause.but it does only happen where the groups cut it or where there are screw ups in the original mpeg stream.i dont mind that since it keeps it all perfect sync.i rather have the audio skipping sometimes (2,3 times per episode) and sync , then fluid audio and async....just my opinion.
anyway, happy as i was i put it on dvd and watched a few episodes.all worked ok....until some episode stopped halfway and jumped back to the menu.....this was weird.i checked and it was the newly muxed output that was totally screwed up.the image was skipping, shocking and crap....and on my pc it somehow kept playing...but my pioneer refused and stopped playback.so there i was....i got my audio sync, and now the video screwed up.
i started tracing back where the fault was.but strangly enough both audio and video streams (the new mpeg2 and 48k audio i made in tmpeg) were working ok by itself, and also in previewing in the authoring software.only when i muxed/compiled it to dvd files it got screwed up...i tried reencoding both video and audio, other authoring software....no luck.the only video that came out good muxed was the original mpeg1 stream, which i thought i couldnt use since it would give my sync issues.
then right before i was about to shift delete all those vcd files off my pc i started thinking.then i found out that the only way was to keep the video ok was to use the original demuxed mpeg1 stream, with the upsampled audio from tmpeg enc....sure that sounds normal since every guide describes it that way (and tools like svcd2dvd do it for you).however, the difference was that I made the new audiotrack with the full original mpeg stream as source input, and not just the demuxed audiostream from it.that way i got a new 48k track, which was based on the full org mpeg stream, and therefore took into account any fault,cuts whatever there was in the original file....and spits out a file (with a few skips here and there, so what) which is in perfect sync with the original video ! also the video doesnt skip anymore like the original, it plays smooth, only the audio halts every now and then.
so anyway, to make it short: make your new audio in tmpegenc plus, using the full mpg as source, and choose to only output the audio ES stream.....put it together with the original video that you demuxed and voila....a perfect in sycn result, with better video than original at the cost of only a few minor pauses in audio.using tools like svcd2dvd or dvdlab will NOT get you these result from what I have tested.
and now i will continue watching my episodes from dvd :)
I hope this helps others here having the same problems.If this was already common knowledge, then im sorry, just be happy for me i also got it working:)
Ive been fiddling with putting 24 season 2 tv series vcd's on dvd.In the basics its very easy, just convert the audio and put it all together.
But just like many others i ran into sync issues.This was due to the original MPEGs being edited, commercial cuts etc.That is what screws up the mpeg stream.
when demuxing and muxing again (with just the audio upsampled) you'll get sync issues no doubt.
I tried and tried many ways and tools.but no luck.read nice guides here and there about this topic.no luck.
the problem is this: the original mpeg plays fine.....but if you look closely you'll see that the video sometimes glitches due to the editing the groups do.this is no problem since the video skips a few frames to stay in sync with the audio (or something like it).but as soon as you seperate the audio and convert and put it back...it looses the sync.
i tried to convert the whole mpeg1 stream to mpeg2(incl.48k audio) in tmpegenc plus.which indeed solved the sync issue.sure some quality loss but not that noticible.the only thing now is that the video does not skip at the "cutting" points but a very short silence is in the audio, like a short pause.but it does only happen where the groups cut it or where there are screw ups in the original mpeg stream.i dont mind that since it keeps it all perfect sync.i rather have the audio skipping sometimes (2,3 times per episode) and sync , then fluid audio and async....just my opinion.
anyway, happy as i was i put it on dvd and watched a few episodes.all worked ok....until some episode stopped halfway and jumped back to the menu.....this was weird.i checked and it was the newly muxed output that was totally screwed up.the image was skipping, shocking and crap....and on my pc it somehow kept playing...but my pioneer refused and stopped playback.so there i was....i got my audio sync, and now the video screwed up.
i started tracing back where the fault was.but strangly enough both audio and video streams (the new mpeg2 and 48k audio i made in tmpeg) were working ok by itself, and also in previewing in the authoring software.only when i muxed/compiled it to dvd files it got screwed up...i tried reencoding both video and audio, other authoring software....no luck.the only video that came out good muxed was the original mpeg1 stream, which i thought i couldnt use since it would give my sync issues.
then right before i was about to shift delete all those vcd files off my pc i started thinking.then i found out that the only way was to keep the video ok was to use the original demuxed mpeg1 stream, with the upsampled audio from tmpeg enc....sure that sounds normal since every guide describes it that way (and tools like svcd2dvd do it for you).however, the difference was that I made the new audiotrack with the full original mpeg stream as source input, and not just the demuxed audiostream from it.that way i got a new 48k track, which was based on the full org mpeg stream, and therefore took into account any fault,cuts whatever there was in the original file....and spits out a file (with a few skips here and there, so what) which is in perfect sync with the original video ! also the video doesnt skip anymore like the original, it plays smooth, only the audio halts every now and then.
so anyway, to make it short: make your new audio in tmpegenc plus, using the full mpg as source, and choose to only output the audio ES stream.....put it together with the original video that you demuxed and voila....a perfect in sycn result, with better video than original at the cost of only a few minor pauses in audio.using tools like svcd2dvd or dvdlab will NOT get you these result from what I have tested.
and now i will continue watching my episodes from dvd :)
I hope this helps others here having the same problems.If this was already common knowledge, then im sorry, just be happy for me i also got it working:)