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DIVX


DIVX

Postby straightridahuk » Oct 25, 2002 @ 8:20pm

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Postby refractor » Oct 25, 2002 @ 8:32pm

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Postby jeffmd » Oct 29, 2002 @ 4:50am

ok, I did the math, with 128 megs, you can encode 142 minutes of video useing 15Kbytes a second. a 128Kbit mp3 is roughly 16Kbytes a second. 128kbits is simply not enough for a divx video and mp3 or ogg audio track.

What I would do... if you really had to do this project, is get my self realplayer ONE for pocket pc, and encode in realmeda format at around 90kbits a second. with mono sound, it should be pretty watchable on the small screen.
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Postby Mechcommander » Oct 29, 2002 @ 4:31pm

I use 7kbps, and my vids turn out fine. I can put a 2 hour movie on a 64MB card :)
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Postby James S » Oct 29, 2002 @ 4:46pm

You Cuhrayzee mofool! 7 Kbps?!?
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Postby Mechcommander » Oct 29, 2002 @ 4:49pm

Mmmhmm. The noir vids look perfect.
I dunno about live action tho... Ill have to record Indian Jones tonight and encode it.
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Postby jeffmd » Oct 30, 2002 @ 1:04am

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Postby sponge » Oct 30, 2002 @ 1:09am

holy internets batman.
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Postby jeffmdy » Nov 3, 2002 @ 6:24am

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Postby jeffmd » Nov 4, 2002 @ 1:40am

I downloaded a hq mpeg music video to do some more test with, the result far much better with live action then it does with my anime for sure. I would have guessed that because my anime requires less info per frame because of solid colors and some frames not needing update that it would look better at lower bitrates, but its not all that much of an impact as the codec still can't maintain fine lines unless you use a high bitrate.

I found that 75Kbit decimated video is quite watchable for live action, is it me or does ppc have a way of makeing crappy video look better? It allways looks better then when it does on my pc when I test it after encodeing, even when I dont enlarge the video on my PC so its the same size almost as my PPC.

I did 3 test, all 320x200 (the music video was widescreen), and all of them used the same 80Kbit stereo ogg audio track. The music video is not CG laden, but it has very high motion, many scene changes, fades, split screens, and numorouse water sequences with bubbles. the first one was 75kbit decimated by 2, watchable, no frames droped. the 2nd was 150Kbyte, full 25fps (it was a japan music video), it was generaly unwatchable. lost half the frames, and of course because I doubled the framerate with the data rate, the quality per frame did not increase. Live action decimated video seems to be far more tolerable then I find decimated animation video so the 3rd one which was 150Kbit decimated video was the best. I droped 18 frames over a 3 minute 33second period. For me, my choice of music videos is the 3rd one, but for those with smaller storage cards, go for #1.

I dont have realvideo encoder nore do I ever plan on reinstalling it in my life, ditto for the player, so no test there. ;)
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Postby sponge » Nov 4, 2002 @ 2:09am

The screens on the PPC are still not as high quality, so while they may look the same pixel-wise, your just not used to the quality of video on the PPC, I'd guess.

Also, PocketDivx does have some image enchancing options, that could do a bit.
holy internets batman.
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Postby chien » Nov 4, 2002 @ 5:54am

still belong to nirv sponge :?:
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Postby Mike Bannick » Nov 4, 2002 @ 9:16am

lol by now everyone should know he was a part of it. :P
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Postby sponge » Nov 4, 2002 @ 1:47pm

holy internets batman.
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Postby Mechcommander » Nov 4, 2002 @ 4:32pm

Well, dont ask me how.. I used the DivX 4.12 codec at 7kbps with 22khz sound, and Noir looks and sounds perfect. All at 14 MB every 30 mins.
Dont ask me how I did it, but I did.
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