Whats the best and/or fastest way for resizing

[Bierschaum]

I normaly use DVD2AVI and TMPGEnc for encoding my videos to (S)VCDs. The black borders of movies in 16:9 format are cropped by DVD2AVI. The other resizing is done by TMPGEnc with the size settings and the clip and arrange options.
An other way is the additional use of AVISYNTH for resizing, without any cropping/resize in DVD2AVI and TMPGEnc. My questions are:
- Are there differences in resize quality between the two ways (TMPGEnc resize or AVISYNTH bilinear/bicubic resize)?
- Is there a speed increase, if the black borders are cropped before?
- Which Resize method is the fastest?
- Which Resize method has the best quality?
- Is there a difference between bilinear and bicubic resize if the picture is resized only in one direction.
- Whats about the loss of performance by using *.avs sripts?

Thanks

[poopity poop]

There will be a difference in resize between avisynth and tmpeg, but I'm not sure what method TMPEG uses for its resize.
I'm also not sure about speed. I would however venture to say avisynth if faster just because its simple and doens't go through a "real" program. Resizeing methods are better quality in avisynth because you can have more control over how you resize it, A/B values for bicubic, or bilinear resizing.
There will be a difference between bilinear and bicubic even if its in one direction.

Sorry I could be of more help never ran into some of those situations. Hopefully someone else can answer the other questions.

[mikeathome]

Originally posted by Bierschaum
I normaly use DVD2AVI and TMPGEnc for encoding my videos to (S)VCDs. The black borders of movies in 16:9 format are cropped by DVD2AVI. The other resizing is done by TMPGEnc with the size settings and the clip and arrange options.
An other way is the additional use of AVISYNTH for resizing, without any cropping/resize in DVD2AVI and TMPGEnc. My questions are:
- Are there differences in resize quality between the two ways (TMPGEnc resize or AVISYNTH bilinear/bicubic resize)?
NO, not really.

- Is there a speed increase, if the black borders are cropped before?
YES, less information to handle.

- Which Resize method is the fastest?
Bilinear, ?, don't know, but with mpeg2dec.dll and AviSynth.

- Which Resize method has the best quality?
Precise BiCubic

- Is there a difference between bilinear and bicubic resize if the picture is resized only in one direction.
Forwarded to an expert...

- Whats about the loss of performance by using *.avs sripts?
There will be a performance increase if you use AviSynth (.avs script) together with mpeg2dec.dll (MPEGSource) because the transitions will be done in YUV colorspace (less data to handle). This is true as long as you don't use VirtualDub Filters which work in RGB colorspace.
But all this is so marginal in comparision to the encoding that it won't lead to a boost. If you really want to increase speed than use CCESP together with AviSynth.
You may want to test FitCD which is a pedant to GordianKnot but this time for VCD/SVCD creation.

Link to FitCD: http://www.afterdawn.com/software/video_software/video_tools/fitcd.cfm
German SVCD resource (great stuff): http://www.mb1.de.vu/

mike