XVid Aspect Ratio

pipsqueak · 24th May 2004, 21:12

Is there a less memory intensive way of altering the aspect ratio of video (tried FFDshow but it kills my meagre vram)?

i need to move widescreen to 4:3 or similar...

thanks

minolta · 24th May 2004, 21:45

the resize of ffdshow is a bit cpu expensive (although, i think it is higher quality than bilinear). a faster resize can be done using your media player (no, not windows media player). I use "media player classic" and "vlc". do a google search to find them. also, there exists zoom player, core, and others (see the Software Players section of forum).

-Minolta

p.s. vlc is even smart enough to automatically resize if the clip was encoded knowing its proper aspect ratio. for example, when i encode at 352x480 i tell xvid the output should be 4:3AR. vlc reads this number inside the avi and resizes for me...

pipsqueak · 24th May 2004, 21:52

i use media center for playback (i like using 1 prog for audio, video, images etc), so id like to stick to that. DivX has an option that lets me alter the aspect ratio directly, does XVid have anything like this?

minolta · 24th May 2004, 22:23

haven't seen media center myself, so can't be much help there. with divx AR, i assume your talking about "quality settings->aspect ratio" in the filter config? the xvid decoder does not have this function. you might try ffdshow again and set "resize->settings" to "fast bilinear" (if you have not already).

-Minolta

p.s. my reference to xvid AR was for the encoder only. the decoder simply ignores AR number. like ffdshow, vlc contains its own mpeg-4 decoder. unlike ffdshow, vlc does not ignore AR and resizes (the damn number is indeed inside the avi afterall). just wish vlc would do an automatic deinterlace as well...

Neo Neko · 25th May 2004, 08:04

ffdshow's resize algos are adjustable. You can do a simple "nearest neighbor" resize all the way up to the excelent lanczos3 resize.

pipsqueak · 25th May 2004, 21:23

so installed ffdshow a second time and played with the settings. fantastic. for some reason even with all the settings unchecked it now allows Media Center to change the aspect ratios - something i couldnt do earlier

24th May 2004, 21:12	#1 \| Link
pipsqueak Registered User Join Date: May 2004 Posts: 3	XVid Aspect Ratio Is there a less memory intensive way of altering the aspect ratio of video (tried FFDshow but it kills my meagre vram)? i need to move widescreen to 4:3 or similar... thanks

25th May 2004, 08:04	#5 \| Link
Neo Neko Registered User Join Date: Mar 2002 Location: Kansas City, Missouri Posts: 1,812	ffdshow's resize algos are adjustable. You can do a simple "nearest neighbor" resize all the way up to the excelent lanczos3 resize. __________________ Opensource will not take over the world. But it will sure improve the lives of most of it! _______________________________________________ Inkscape - Scallable Vector Graphics for everyone. The GIMP - Free raster graphics and photo editing software. Planeshift - Free 3D MMORPG. Cause everyone needs some fun.

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24th May 2004, 21:45	#2 \| Link
minolta Registered User Join Date: Feb 2004 Posts: 103	the resize of ffdshow is a bit cpu expensive (although, i think it is higher quality than bilinear). a faster resize can be done using your media player (no, not windows media player). I use "media player classic" and "vlc". do a google search to find them. also, there exists zoom player, core, and others (see the Software Players section of forum). -Minolta p.s. vlc is even smart enough to automatically resize if the clip was encoded knowing its proper aspect ratio. for example, when i encode at 352x480 i tell xvid the output should be 4:3AR. vlc reads this number inside the avi and resizes for me...

24th May 2004, 21:52	#3 \| Link
pipsqueak Registered User Join Date: May 2004 Posts: 3	i use media center for playback (i like using 1 prog for audio, video, images etc), so id like to stick to that. DivX has an option that lets me alter the aspect ratio directly, does XVid have anything like this?

24th May 2004, 22:23	#4 \| Link
minolta Registered User Join Date: Feb 2004 Posts: 103	haven't seen media center myself, so can't be much help there. with divx AR, i assume your talking about "quality settings->aspect ratio" in the filter config? the xvid decoder does not have this function. you might try ffdshow again and set "resize->settings" to "fast bilinear" (if you have not already). -Minolta p.s. my reference to xvid AR was for the encoder only. the decoder simply ignores AR number. like ffdshow, vlc contains its own mpeg-4 decoder. unlike ffdshow, vlc does not ignore AR and resizes (the damn number is indeed inside the avi afterall). just wish vlc would do an automatic deinterlace as well...

25th May 2004, 21:23	#6 \| Link
pipsqueak Registered User Join Date: May 2004 Posts: 3	so installed ffdshow a second time and played with the settings. fantastic. for some reason even with all the settings unchecked it now allows Media Center to change the aspect ratios - something i couldnt do earlier