[maemo-developers] [maemo-developers] Re: Playback of MPEG2?

[From: Jussi Pakkanen]

--- trfm64q02 at sneakemail.com wrote:

> on the Nokia webpage I saw the hint that the N770
> can playback MPEG4, Real Video, H.263, ... (see
> IceAge trailer)
> But do we have a change to playback MPEG2 video
> files? (e.g. DVB-S recordings or DVDs)
> Is the HW fast enough (with accelerator if any)?

There are two problems: 1) the CPU and 2) memory bus.
The CPU (even with the DSP) is not fast enough to
unpack DVD or DVB resolution video. The even bigger
problem is the memory bus, or to quote someone from
#maemo: "The 770's memory bus is more like a memory
bicycle." The Ice Age trailer is approximately 200x300
pixels with 15 fps, and even that is a bit jerky.

Another problem is the file size. Most DVD movies are
over 4 gigs, while the biggest RS-MMC card you can buy
is 1 gig (AFAIK). I also seriously doubt the WLAN is
fast enough for streaming full rate.

So no, you probably can't do that. But you can
transcode your video to MPEG4 using Mencoder. The
instructions can be found in the wiki. I have done it
myself and it works just fine. 20-30 minutes of video
takes only ~80 megs and is quite watchable.



		
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