[mythtv-users] Way OT but...

[Nick Rout]

On Wed, 19 Oct 2005 21:45:42 +0200
Gert van der Knokke wrote:

> Nick Rout wrote:
> 
> >OK so there are threads on here about the video ipod so I thought this
> >one is ok too.
> >
> >My son was recently given a little mp3 player sourced in Hong Kong. It
> >has a little screen and can play videos as well as music. There is a
> >sample video on the machine when you buy it, and it plays tolerably well. 
> >
> >Trouble is i cannot figure out the file format or codecs used so that i
> >can encode video for it. There are some programs on the accompanying CD,
> >but they are all chinese language and for windows.
> >
> >The file has the suffix .mtv and running file on it simply gives the
> >result "data". mplayer, xine, ffmpeg, tcprobe all fail to recognise it.
> >
> >The device is branged "mp4" and was made somewhere in asia. 
> >
> >Any ideas on how to figure out how this stuff is encoded and packaged?
> >  
> >
> Quote of some stuff I found with Google:
> 
> > The most so called china mp4 devices I'm aware of, support only
> > variations of mtv like dmv or mpx. There is no chance at all to play
> > native wmv or mpg without prior conversion because those devices have
> > neither hardware nor software decoding support. The concept of the mtv
> > format (and all derivates) is, to have an mp3 stream that carries image
> > information that is allready in the format of the display hardware
> > (uncompressed). A hardware mp3 decoder is already in place, the display
> > hardware only need to point to the memory adress of the next image
> > (simple implementation in soft- and hardware).
> 
> Hope this will help...
> 
> Gert
> 

Thanks Gert, that makes sense as i have seen people complain that their
video files get bigger when theey convert them for use on these devices!




-- 
Nick Rout <nick at rout.co.nz>