MPEG-1 AutoGK Input

[starwave]

I have one suggestion for PAL MPEG1 video input files.
I have noticed AutoGK always tries to maintain Width (352) and resizes height to adjust aspect ratio.
This proceeding is good for NTSC MPEG-1 because AutoGK resizes NTSC videos of 352x240 to 352x264 and no pixels are lost.
Using PAL MPEG-1 videos of 352x288, AutoGK resizes to 352x264 and some lines are lost and video quality is lower than expected.
I suggest PAL videos tries to maintain height (288) and resizes up width (352 to 384) to adjust aspect ratio. In this manner no lines will be lost and video quality will be higher.

[len0x]

Its the same for PAL DVDs actually (720x576 where 576 is always resized down). Its not obvious that quality will be higher as new pixels on width axis has to be introduced that were not there in the first place...

[starwave]

I have compressed the same PAL MPEG-1 video file using Auto mode of AutoGK (352 width) and using manual fixed width of 384.
Output avi is more sharp at 384x288 than at 352x264, specially when video has small text on it like subtitles.
You said some newly created pixels are added to width in PAL mode, but the same actually happens at height on NTSC mode in AutoGK.
I think MPEG-1 files has very few lines compared to MPEG-2 and in some cases height is cropped (aspect ratios of 16:9) resulting in very very few lines compared to MPEG-2 videos.
I have tested manual 384x288 in front of Auto 352x264 and I prefer newly interpolated pixels on width than losing pixels on height.
When video input is MPEG-2, some lines can be sacrified but MPEG-1 is another case because video information (in pixels) is a quarter of MPEG-2 and adding height loosing gives more noticeable video loss.
I think AutoGK should try to fix width or height (after cropping), resizing up the other parameter to maintain aspect ratio in Auto Mode (only on MPEG-1 files).
It's only a suggestion.

[len0x]

does anyone else agree with this?

[len0x]

doesn't look like anyone else is encoding mpeg1 :)

[starwave]

I think people reads specially your principal thread for AutoGK (Sticky) but I think MPEG-1 Input is very interesting.
I use it to reduce size of 800MB MPEG-1 files with no visual quality loss. In this manner I can put 7 files (of 640MB) on a single DVD (and conversion is faster than usual).
I have noticed too that some DVD players can't mix DivX and MPEG-1 files and this option is the solution to put different files on a single DVD.

[starwave]

Thank you len0x, for support my PAL MPEG-1 suggestion on your last version of AutoGK. Thanks