Rockbox Development > Feature Ideas

XVID Support?

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Mikgerdan1991:
Hi, first post!  ;D

Well, currently, I have a Zen Vision M, and I am considering switching to the iPod Video just so I can get Rockbox on it for all the features it has. (How is Rockbox going for the Zen, anyway?) Anyway, the ONLY thing keeping me with the Zen is XVID support. In my opinion, it's the best video compressor, and the file size is extremely low compared to MPEG. Is there any chance of XVID support for Rockbox, or is work already possibly being done?

Llorean:
XVID is significantly more computationally complex, and is very unlikely to even come particularly close to full speed on the iPod Video. While nobody's working on XVID if you want to watch video on Rockbox the Gigabeat players are much better suited to it and are more likely to be full speed if someone does do the work  for XVID.

As it stands, people have suggested it, but nobody is apparently interested in putting in the time to do it.

Mikgerdan1991:
Aw, that really sucks, I'm sure file size is a lot of people's concerns with MP# Video Players these days, with most of them being around 30-60 GB...With MPEG, you couldn't store a whole lot of movies on a Rockbox device.  :-\

Ah well, I guess I'll stick with my Zen, more space means more videos.  ;)

I'm not a coder, nor do I know anything about it, but would it be that difficult to put a new video codec onto Rockbox?

Llorean:
At ~500MB per movie at a quite good quality, I can store 60 movies on a 30GB device. That's not really "not many."

It's not really as simple as "just putting a codec on." You'd need to do a lot of optimizations specific to the architecture of the player, and possibly convert it to fixed point.

saratoga:

--- Quote from: Mikgerdan1991 on March 08, 2009, 10:59:02 PM ---I'm not a coder, nor do I know anything about it, but would it be that difficult to put a new video codec onto Rockbox?

--- End quote ---

Full Xvid support is basically impossible given the CPU on the iPod video. 

And anyway, you overestimate the savings with Xvid.  The difference in file size is fairly small.  The wiki recommends 0.3 bits/pixel for MEPG2.  Typical Xvid is around 1.5-2 bits/pixel.

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