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> Playing Vga Video On A C750/c760/c860, 640x352@25 fps, with 500 kbps
guylhem
post Nov 30 2006, 04:51 AM
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Hello

Thanks to the generous loan of a C750, I could start experimenting with software "enhancements".

After some research on the forums, I found there were many discussion about video playback on the C7/8x0, with most people using 320x240 only. Well, looks like you can do much better than that ! Maslovsky and kfetisov reported vga playback at 248 kbps with mono audio, but that too can be improved.

After some tests, I could succesfully achieve 640x352@25 fps, with 500 kbps and stereo 64 kbps audio. You simply have to overclock with CCCR=163 (edit /home/zaurus/Settings/freqchange.conf to add a line above the "Overclocked"/162 entry with "Max overclocking" and 163)

Here's the script I used for encoding, along with the command line for playback. I recommand mplayer-w100_1.0pre5.2-1_arm.ipk.

I put the files on a 1GB CF, so the space constraint is not existant. I will now try to reproduce that on a 2.6 kernel, which I patched to add overclocking support.

Guylhem
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Attached File  mencoder.txt ( 1.43K ) Number of downloads: 68
 
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koen
post Nov 30 2006, 05:25 AM
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Before going of on a coding spree, have a look at http://libw100.sourceforge.net/index.php/Main_Page . That also has a patch for mplayer to add a new video out driver that works with w100 and w3220 devices (ipaq hx4700 for example). No firmware or libaticore needed, so it's 100% free software.
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guylhem
post Dec 3 2006, 09:49 AM
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Thanks for the pointer - didn't notice it. I will have to test ati-w100 kdrive on oe first, to see how it currently works.
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