[MPlayer-users] P2PTV and MPEG1/2 (need help)

[Nico Sabbi]

jeff han wrote:

> Hi,
>    my situation is like this, I need to transcode in near real time a
> network feed from ASF container (wma audio and wmv9 video codec) to
> mpeg1/2/4 format
>
> to try to make the P2P TV working on my D-Link DSM-320 hardware media 
> player
>
> 1. the network feed is ready at  (http://localhost:port/tv.asf)
> 2. the dsm320 mediaplayer doesn't support ASF format
> 3. so I have to transcode it to MPEG1/2/4 format
>
> I have no problem to transcode it to above formats by segments (at the 
> end
> of each transcoding, according to my poor knowledge of AVI container 
> format,
> it will write the header and index information at end)
>
> DSM320 seems refuse to play AVI file without index information from 
> the file
> (which is understandble, it suppose to support forward and backward 
> button
> etc)
>
> I am not quite familiar with the MPEG1/MPEG2 Program Stream (and ES), 
> dsm320
> also refuse to play MPEG1/2 files without index informaton (such as those
> transcoded file purposely interrupted without the chance by mencode to 
> write
> the header and index information at end)
>
> Can any of you guys out there, answer my (maybe too silly) question?
>
> 1. does MPEG1/MPEG2 mandate the index information in the PS/ES?

no, no one ever produced it

>
> 2. is it doable to transcode ASF file in real time by mencoder to dsm320
> playable MPEG1/MPEG2?

yes, see the docs

> 3. if the index informaton is mandatory in MPEG1/2,  is there a 
> workaound?
> 4. or my thought is totally wrong?
>

mostly

>
> bottom line is:
>
> I have a stream of ASF, I want to transcode it in real time (well, 
> maybe a
> bit delay) and feed it to dsm320 hardware mediaplayer
>
mencoder -of mpeg -mpegopts format=dvd ....
 
 
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