Anamorphic VOB (4: 3 720x480) into a static AVI (4: 3 640x480)

[Megafox]

I ask the question again because the past has not received a clear answer. How do I turn an Anamorphic VOB (4: 3 720x480) into a static AVI (4: 3 640x480) or another container (MPG) without an IFO file? I tried the DVDPatcher program, but after it the video became blocky, white, and I could not fix it. ReStream during the download VOB freezes, and during the download of the remuxed MPG everything is fine, changed the resolution, set the normal settings, but when outputting I get an error that demuxed streams are not supported. What should I do? Is there a normal analogue to these programs? Or a script for AviSynth, which allows you to do this? I already despaired.

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[jagabo]

Open the VOB file(s) in DgIndex. Make an Index file. Use Mpeg2Source("filename.d2v") to open the video in AviSynth. You may need to inverse telecine (TFM().TDecimate()) or deinterlace (QTGMC()). Resize to a 4:3 frame size in the AviSynth scrip, for example Spline36Resize(640, 480). Encode as square pixel in any encoder that supports AviSynth scripts as input -- like VirtualDub.

[Megafox]

Open the VOB file(s) in DgIndex. Make an Index file. Use Mpeg2Source("filename.d2v") to open the video in AviSynth. You may need to inverse telecine (TFM().TDecimate()) or deinterlace (QTGMC()). Resize to a 4:3 frame size in the AviSynth scrip, for example Spline36Resize(640, 480). Encode as square pixel in any encoder that supports AviSynth scripts as input -- like VirtualDub.

Changing the resolution does not spoil the quality? Maybe first the stretched pixels are divided into square ones, and then the resolution changes, and a bad picture is obtained. If you just make the pixels square already at the input, then it will see 640x480, and nothing will have to be changed, but how? Without codec, only change AR

[jagabo]

Changing the resolution does not spoil the quality?

I guessed you wanted square pixel when you said "static AVI". If you don't want square pixel encoding keep the original frames size and set the PAR or DAR in the video codec -- just like the DVD.

[manono]

How do I turn an Anamorphic VOB (4: 3 720x480) into a static AVI (4: 3 640x480) or another container (MPG) without an IFO file?

Geez, is it really so hard? If you don't want to reencode, just make an MPG out of it using VOB2MPG, or MPEG2Cut2 or some such. It'll retain the 4:3 DAR.

I don't know for sure if VOB2MPG requires IFO input. If it does, then use MPEG2Cut2. Open the VOB(s) and save it out as MPG.

You can also extract both the M2V and AC3 audio using the DGIndex jagabo mentioned earlier (File->Save Project and Demux Video) and make the MPG using ImagoMPEG-Muxer.

Or a script for AviSynth, which allows you to do this?

Do you know that the use of AviSynth requires reencoding?

[Megafox]

How do I turn an Anamorphic VOB (4: 3 720x480) into a static AVI (4: 3 640x480) or another container (MPG) without an IFO file?

Geez, is it really so hard? If you don't want to reencode, just make an MPG out of it using VOB2MPG, or MPEG2Cut2 or some such. It'll retain the 4:3 DAR.

I don't know for sure if VOB2MPG requires IFO input. If it does, then use MPEG2Cut2. Open the VOB(s) and save it out as MPG.

You can also extract both the M2V and AC3 audio using the DGIndex jagabo mentioned earlier (File->Save Project and Demux Video) and make the MPG using ImagoMPEG-Muxer.

Or a script for AviSynth, which allows you to do this?

Do you know that the use of AviSynth requires reencoding?

I already did this, still the video becomes square pixels, although the resolution should be 640x480

[manono]

I already did this, still the video becomes square pixels, although the resolution should be 640x480

You already did what? I outlined four different methods (if including AviSynth with a resize to 640x480). The three methods of creating MPGs all retain the 4:3 DAR and will play at 1.33:1. Now, if you open an AviSynth script in VDub (for example), yes, it'll show as 1.5:1 (720/480=1.5)

NTSC DVDs are mostly 720x480 (1.5:1) but the 4:3 DAR has them play at some 1.33:1 ratio (such as 640x480). You can either resize them to 640x480 and then reencode them, losing a little bit of quality, or convert them to MPG while retaining the 4:3 DAR and the original quality. I think you're making this more difficult than it really is.

[Cornucopia]

AVISynth is an intermediate processor, and it does not recognize ANY aspect ratio stuff - neither Pixel/Sample AR nor Display/Frame AR. So, you could say, it assumes EVERYTHING is square pixel. Since AVISynth doesn't encode on its own, that doesn't truly matter within the program. But it's good for you to know what's going on.

...Something comes into AVISynth as 720x480. Even if it is meant to be non-square pixels, the apps just acts as if there is only one kind of pixel (square). So if you know your intended output is supposed to also be non-square, you don't resize but just remember to flag it in the encoder.*
If your intended output is supposed to be square, you MUST resize to a square equivalent to your non-square source (and NOT flag).*
For 720x480 (4:3), I recommend 640x480. For 720x480 (16:9), I recommend 852x480. There are similar range of numbers for the PAL side.

You're false assumptions due to incomplete knowledge of the relationship of AR is causing you to make this harder than it needs to be.
Just remember: DAR = (H rez / V rez) * PAR. That is universal.

Scott

*This assumes you don't have any other cropping, uprezzing/downrezzing/resizing to do for other reasons.