weird audio/video wrong-synced problem

[michcio]

hi!

I've been trying for days now to make my audio/video right synced and still can't succe. I have an .avi which I encode to .m2v using avisynth and HCenc my script is simple:

AVISource("D:\MyAvi.avi")
BicubicResize(720,480,0,0.6,90,0,504,276)

I've been forsed to resize the movie into 720x480 (framerate is 23.976 so I want it in proper NTSC settings and otherwise HCEnc gives me the resolution/framerate warning) and therefore I've added the BicubicResize line.

now after encoded the .m2v I have both tried to encode the ac3 by:

1) open my .avs in virtualdub -> take out the wav (full prcessing mode) -> convert to ac3 using ffmpeggui (192 / 48000)

2) open my .avi and encode the .ac3 directly by using ffmpeggui

have also tried to change AVISource to DirectShowSource but didn't help

(after each method I mux both audio and video streams into .mkv using mkvmerge GUI to see if they get's synced but as said as far I can't get it working

what am I doing wrong?

thankfull for answers!

michcio

[jagabo]

What's the frame rate of your AVI file?

What's wrong with the sync in your MKV file? Is it off by a constant amount for the whole video? Does it start in sync and get progressively worse as you get further into the video?

[michcio]

thanks for answering

the framerate of my AVI is 23.976 and the audio is out of sync trough the whole video (audio comes a lot too soon then the video)

[jagabo]

Set an audio delay in MkvMerge to get the audio back in sync: hilite the audio track in the "Tracks" section, then on the Format Specific Options tab set the Delay.

[michcio]

yeah that's what I'm tring to do right now seems like there need to be 24-25 sec. delay...but is this really the "right" way of fixing that problem? I mean shouln't I make the .avs more properly then just resizing my .avi to proper NTSC AspectRatio?

[jagabo]

You could cut 24 or 25 seconds off the start of your video instead.

[michcio]

yeah :P...oh this was kind of hard, can't get it right..don't know exactly how much delay I should add to the audio...tested with 25 and 24 and both get's wrong ...the audio seems like it begins at 24 sec..so why doesn't that delay work :S

[michcio]

maybe the audio get more and more unsynced futher in the video and that's why it gets wrong...

[michcio]

yes finally I get the right ms 24200 :P thank you for helping me out jagabo

regards

michcio

[jagabo]

Glad you got it worked out...