[Mplayer-dvb] fast transcoding?

[Arpi]

Hi,

> I'm very interested in the feature called "realtime transcoding between 
> MPEG2 and MPEG4 (partial decompression)" in the mplayer manual since my 
where?
it was on TODO for a while, but has been removed afair

> vdr-box is by far too slow to do this job and I don't want to buy new 
> hardware, if my DVB-Card could already do half the work...
> 
> How similar are the two formats really? Does anyone have a nice 
not enough :(
at first look the transcode is possible, for simple, base level mpeg4 files
or divx files. anyway new divx/mpeg4 uses extras, like quarter-pel motion
vectors, h263 quantizers, gmc and so on, they were not part of mpeg 1/2
standard so the dvb probably cannot handle these things.
the other hard point is the unrestricted mv - the 32 pixels wide invisible
border over the image used for MC of next frame. it could be emulated (very
tricky anyway) with dvb but would be visible :(

> documentation on the mpeg-fileformats. If I had a nice documentation, I 
try google, and links at ffmpeg and libmpeg2 sites

> would even try to implement this feature myself.


A'rpi / Astral & ESP-team

--
Developer of MPlayer, the Movie Player for Linux - http://www.MPlayerHQ.hu