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aspect ratio problem with transcode
http://forum.linhes.org/viewtopic.php?f=11&t=5222		 Page 1 of 1
Author:  bowlarium [ Thu Jul 07, 2005 11:45 am ]
Post subject:  aspect ratio problem with transcode
i recently installed knoppmyth r5a16 on a 2.4 celeron box with a pvr-350. everything is working fine except the aspect ratio when using transcode to compress a ripped dvd. for a letterboxed dvd, it rips fine to vob ("perfect" quality), but if i try "excellent" or "good" quality with xvid, i get a smushed version of the dvd. by that i mean that mplayer thinks it's a different aspect ratio than it is, so everything's smushed in from the sides and the movie looks stretched vertically. i tried playing one of the files on a windows machine with vlc, and i get the same thing. if i change the aspect ratio setting in vlc, it looks fine, so it seems transcode isn't cropping anything; it's just reporting the wrong aspect ratio in the file.

i've looked at the man pages for mplayer and transcode, and i decided not to use the aspect ratio option in mplayer because then my 4:3 rips will display incorrectly. and i'm not sure about the transcode options. would the import_asr option fix my problem?

i appreciate any help you can offer.

thanks.
Author:  bowlarium [ Mon Jul 11, 2005 7:21 am ]
Post subject:  found a solution
turns out this happened when i ripped anamorphic dvd's to xvid. i hear there's not a good way to encode aspect ratio into avi files. so anyway to get around this, use a different player command for each anamorphic movie rip. use the -r anamorphic switch in xine to force 16:9. make sure you also set the DisplaySize in your X config.

thanks to Jason for the help.
Author:  crabby [ Fri Jul 15, 2005 3:44 pm ]
Post subject: 
For mplayer users another option I have been using is to rewrite the avi files with an embeded aspect ratio that mplayer understands. I don't think other players will pick up the aspect ratio, but after this mplayer plays it right without extra options.

Code:
mencoder -ovc copy -oac copy -force-avi-aspect 1.78 -o newfile.avi file.avi


Where file.avi is the original rip and newfile.avi is the new one. Then just replace the original avi with the new one.

If you don't want rewrite the avi then you can also tell mplayer the proper aspect ratio by adding the option '-aspect 1.78' to the command line.
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