audio sync

[Homeiss]

Everyone talks about how they capture and it's never good enough for quality, but I have troubles recrding onto my comp and keepng the audio in sync with the video. Anyone know why?

I am using a Dazzle DVC 80 to capture and I have a 1GHz with 128MB of ram if that makes a diff? Oh and I use MGI VideoWave to capture with the HuffYuv Codec.

Thanks.

[Mirror_Image]

Everyone talks about how they capture and it's never good enough for quality, but I have troubles recrding onto my comp and keepng the audio in sync with the video. Anyone know why?

I am using a Dazzle DVC 80 to capture and I have a 1GHz with 128MB of ram if that makes a diff? Oh and I use MGI VideoWave to capture with the HuffYuv Codec.

Thanks.

I had a similar problem, but with DivX 4.12 captures at 320x240 on my ATI Radeon AIW, postprocessing=6, (1-pass CBR or 1-pass quality-based VBR, it was the same either way).

I was pulling my hair out after a while; I'd record a 2 hour movie, the sound would start out synched OK, but as the movie timeline progressed the sound would begin to lag behind the video very slowly, and by the end of the movie the audio was lagging behind something terrible.

I tried 'demultiplexing' (in TMPGEnc) and stretching (in the Nero Wave Editor) the soundtrack to match the video framrate, but I'd re-multiplex and the sound would do exactly the same thing. Ditto for increasing the video framerate to match the sound.

I posted here and got a suggestion to try opening the AVI in VirtualDub and changing the audio interleave interval from "every 1 frame" to "every 500ms" and it really fixed a lot of it, to the point that at the end of a 2 hour flick the synch is almost perfect. I read that this has something to do with the length of the sound packets but I don't really know if the 'article' I read was smoke and mirrors or not.

[Roginator]

This "may" work: Under framerate in VirtualDub, make audio and video durations match.

[wankykootiepooper]

Perhaps misery loves company. Let me add my two cents worth...

My source is always a DV camera. I initially had an audio delay issue at the capture stage with VideoWave 4, until I installed the drivers supplied by my Firewire card mfgr. Now the capture file contains perfectly sync'd audio. The problem starts when I try to edit the video. VideoWave 4 produced a delay in the "produced" output DV file. Tried varying the audio sampling rate between 32kHz and 44.1 kHz sith the same result.

When I produce the my output DV file using Video Studio 5, the audio is in sync and I now have a perfect DV file, with scene transitions and edits.

Has anyone else seen this problem with VideoWave 4?