[MEncoder-users] Re: sony psp format

[Michael Niedermayer]

Hi

On Tue, Jun 20, 2006 at 09:58:51AM -0700, Jon Drukman wrote:
> Guillaume POIRIER wrote:
> >Here is what a search of the archives should have told you (should you
> >have searched):
> >
> >mencoder -oac lavc -ovc lavc -of lavf -lavcopts
> >aglobal=1:vglobal=1:vcodec=mpeg4:acodec=aac -af lavcresample=24000 -vf
> >harddup -lavfopts
> >format=psp:i_certify_that_my_video_stream_does_not_use_b_frames -ofps
> >30000/1001
> >
> >also note that the width * height must be <= 64000 and both must be
> >multiplies of 16
> >
> >The title should be set with option: -info name=...
> >
> >Note that I can't test any of this, as I don't have a PSP (but if
> >anyone wants to offer one to me, I wouldn't mind ;-)
> 
> i have a PSP and have been testing mencoder and ffmpeg.  unfortunately i 
> have found that mencoder sometimes generates files that the PSP will not 
> play completely.  it will start and play for a while but eventually the 
> PSP will stop and display "cannot play this movie."  i haven't isolated 
> why it happens.  i suspect the bitrate may be peaking above what the PSP 
> can handle.

AFAIK that problem is specific to the latest revision of the PSP software

past versions supported pretty much any bitrate as long as the header claimed
it was not too high (i at least never had a problem with too high bitrates), 
and somehow i think the psp is able to play higher resolution video too

IMHO, the thing is intentionally crippled at the software level, somehow
reminds me of of M$s attempt to keep their msmpeg4v3 codec from being used
with avi and only allow it to be used with asf

another thing is that the psp only supports 24khz audio with mpeg4
while with h.264 apparently only 48khz works

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

In the past you could go to a library and read, borrow or copy any book
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