weird audio behavior (first time happens to me) when joining 3 Xvid video

[MadlyMad]

Hi

I have a weird behavior with virtualdubmod, can't understand it... why this happens

I explain :

I have 3 part of the same video, my aim is to join them and to add to the complete video a second audio track

I transcoded the second audio track (from PAL to NTSC)

I join the 3 part (in direct stream copy mode), I add the new audio track (with a big constant delay on this one, so it's synchronised with the video)

and the weird thing is :
- the audio track I put is perfectly synchronised all the time
- the original audio track seems to suffer from a discontinous delay (it reach around 350ms of delay after 2 Hours of video)

but here is the weirdest :
- the 3 original video part are synchronized all the time with the original track
- when I WATCH and HEAR the joined/complete video, in the join areas, it's perfect, no cut at all of the video or the audio

and finally,
- I tried to apply the interleave/preload method on the first track, to delete this discontinous delay, and it does nothing :( :(

how that's possible ? why it does that (the really first time something like that happens to me)


I wrote the second audio track part for the story, but the thing is the exact same problem comes even when just joining thoses 3 parts

:(

[setarip_old]

Hi!

Please load the first of the 3 XviD-compressed .AVIs into GSpot and post a screencapture back here...

[unskinnyboy]

I wrote the second audio track part for the story, but the thing is the exact same problem comes even when just joining thoses 3 parts
OK, so first, let's disregard the presence of the 2nd audio track for the moment, shall we?

Now, what you say don't add up.

First, you said

- the original audio track seems to suffer from a discontinous delay (it reach around 350ms of delay after 2 Hours of video)

then you said

- when I WATCH and HEAR the joined/complete video, in the join areas, it's perfect, no cut at all of the video or the audio

Don't these two statements contradict each other?

[MadlyMad]

Hi

thanks for answering and Happy New Year to all =)

here we go :

CD1
http://img228.imageshack.us/img228/787/gspotsrcd1bs9.jpg


the interest thing is CD2 has a different preload value, maybe it's the source of the problem ? (but then I can't really see how I could fix it anyway)
CD2
http://img172.imageshack.us/img172/1250/gspotsrcd2vy3.jpg

at last the CD3 has the same preload value as CD2 :
http://img88.imageshack.us/img88/827/gspotsrcd3jz1.jpg


@ unskinnyboy :
what I tried to say is :
there is an effective discontinous delay on the joined/complete video
and at joining areas, there is no cut of the video, and no cut of the audio, didn't there wasn't a delay between audio and video
;)

[MadlyMad]

I just did try to :
- Direct stream Copy CD1 with putting a preload of 512 and interleaving audio every 42 ms (like CD2 and CD3 are if I'm not wrong)
then join 3 xvid video..... same result, delay is the same

- Direct steam copy CD2 and CD3 with a preload of 256 (like cd1), and interleave audio every 42 ms
then join the 3 part
.... still the same result, does not work :( :(

[foxyshadis]

Too many unknown things could have happened during encoding, that supporting a scene release is impossible even if the legality wasn't an issue. You should know rule 6 by now. Encode it yourself so that it's free from any pathology.