Possible solution to the Audio Sync Problem

[MITSUI_1]

Here's a vote for skipping "force film" on all rips (i.e., letting DVD2AVI frameserve at 29.97 fps), and simply running the output through Avisynth with the AMAZING Decomb.dll from D. Graft.

If you are making an MPEG2 SVCD, use these settings:

loadplugin("[drive and path inserted here]\decomb.dll")
Telecide()
Decimate(cycle=5)

This will cause AviSynth to do an adaptive IVTC for you, which eliminates the interlace lines and reduces the footage back to a 23.96 fps frame rate.
You then encode this stuff using "progressive frames" in either CCE or TMPGenc, and run pulldown.exe on the video stream. This adds the information necessary for a standalone DVD player to do a pulldown on playback, and saves muchos space. If you want to save even more space, encode at 1/2 D1 resolution (352x240) and, if it is full screen footage (e.g., pan and scan) think about adding borders of 16 on the left and right and 32 on the top and bottom. By encoding at 23.96 you save 20% worth of bitrate. By using 1/2 D1 and the borders, you save somewhere between another 30 and 40 %! If you put an hour of SVCD per CD using this method, you wind up with spectacular quality.



Sefy,

If you're doing VCDs, use

loadplugin("[drive and path inserted here]\decomb.dll")
Telecide()
Decimate(mode=1,threshold=50)

in avisynth.

This still does IVTC, but keeps it at 29.97 fps with 1 frame out of every 5 a combination of frames, instead of 2 out of every 5. It does not sacrifice any smoothness in my experience, but it does give you added sharpness.

[Sefy]

Thanks MITSUI_1! but i'm sticking to my, as Adam said, if it ain't broken I don't fix it situation, I have no problem with the VCD quality without the 20% extra quality, and I know they work on every single machine i'll put them in.

I just don't like the idea of 23.976 frames when it's gonna be played anyway at 29.976 frames, for me, the playback seems lagging and like a picture is being kept on the screen too long for my taste.

[MITSUI_1]

Hi Sef,

I think my post may not have been clear. For MPEG1 VCDs you should ALWAYS use 29.97 fps anyway, 'cause there are a lot of DVD players that simply cannot handle 24fps mpeg1 properly.

As for SVCD, seriously, try a SVCD at 23.96 fps using the method I describe (including pulldown.exe) and see if you don't believe there is a MAJOR improvement in quality. Better yet, try the 23.96 method PLUS the borders and do two clips with a CQ_VBR and see how much smaller of a file you get at the same quality!

Best regards, MITS

PS... I know its frowned upon in VCDHELP land, but I want you to know we put an extra drop of wine on the plate last night in recognition of the recent troubles in your part of the world. Stay safe bud.

[AAZ]

I am suing Smartriprer to rip, but a problem comes, during vob exraction, Audio Sync Problem occur, an audio delay by 25 mesc. occur, and in some DVD's it 65!.
Just like what the other posts sayd, the mpg file (VCD) gets Audio Sync Problem, What could cause that, (I am ripping Region 1 DVD's)?

[Sefy]

Hi MITS:

As i don't do SVCD's, the maximum i get close to it is SxVCD, then using the Film doesn't do me any good, all my movies i'm using VCD unless i'm unable to fit them into a CD, then i'd use the SxVCD, because i know it plays on my DVD and on my friends DVD Players, i've seen too much trouble with Film and it requires too much work which i'm not willing to put into it

PS: Thanks! that means alot to me! I promise i'll stay in one piece