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| Unofficial VirtualDub Support Forums > Advanced Video Processing > Append Avi Segment / Field Order |
| Posted by: scott_freeland Feb 3 2003, 03:41 PM |
| Greetings. I'm attempting to convert some LaserDisc titles to DVD+R and having some interesting results. Here's what I'm trying: 1) Capture each LD side as it's own AVI Capturing with Huffyuv and uncompressed PCM audio Each AVI is ~13GB 2) Use 'Append AVI Segment' to stitch the 5 parts together 3) Trim out the unwanted garbage (blue screens reading 'Play', A->B, etc.) 4) Save as WAV 5) Frameserve Video to Tmpgenc 6) Convert WAV to AC3 with SoftEncode 7) Put it all together with SpruceUp On playback in a set-top DVD player, the section of the video starting with the 2nd AVI file looks jittery as if the field order were set wrong in the encoder. Sometimes after step 2, the audio is out of sync starting with the 2nd segment, getting progressively worse throughout the film. I understand that Append AVI segment really prefers the segments to be the exact same length and that Vdub ignores the audio offset, explaining the sync error, but strange that it doesn't happen all the time. Would I be better off just letting the capture run while I swap sides and disks and have 1 massive 60 GB file, then edit and frameserve? TIA! -scott |
| Posted by: drizztcanrender Feb 3 2003, 03:56 PM |
| Well i think you've surpassed the 4gb barrier for avi files.Virtualdub has an option of cutting a captured file to 4gb sequences.Use that and then encode your files seperately nad it should be fine. |
| Posted by: scott_freeland Feb 3 2003, 05:42 PM |
| 4GB Barrier for AVI Files? I've never heard of that before. DV Captures from my Hollywood DV or my camcorder routinely are 20-25GB in size and that hasn't ever been a problem before. This is my first effort at analog capture, but I don't know why there would be a difference. BTW, I'm not using VirtualDub for capturing. For some reason when I capture with VD I get a hum in the right audio channel, so I use VirtualVCR for the capture. Also if I encode my files separately, should I then use Tmpgenc's merge function to stitch the mpeg's back together into 1 file? Thanks. -scott |
| Posted by: minion Feb 5 2003, 09:55 PM |
| You Might not have Noticed this But with me anyways the Files I capture with Virtual dub are actually a Different Length than it says the Files are and this could be Why you are haveing Sync issues...When I capture say an hour of Video with Virtual Dub then I load the AVI file into my Mpeg encoder and suddenly the AVI file is a Couple seconds longer or Shorter than it says and the audio is a Different length ,So what I do is Use an Audio editor to Stretch the audio to the exact length of the Video, and this is How I fix sync issues with V-Dub, I have to do this with every file I capture with Virtual Dub but it also works right every time .... |
| Posted by: scott_freeland Feb 15 2003, 12:23 AM |
| Well I tried letting the capture run while I swapped sides and disks and had 0 frames dropped over about 2 1/2 hours of straight capture. The final capture was around 54GB, and after trimming out the blue screen sections the final avi was 46GB. No audio sync issues. It encoded fine with tpmgenc. thanks! -scott |