Re: [mpeg2-dev] unable to decode properly

[Keith W. <ke...@MI...>]

Hi Gus,

If I had to make a wild guess, you're trying to play an MPEG-2 system 
stream (a transport stream or program stream).

sample2.c only works on an MPEG-2 video elementary stream -- the raw video 
that is multiplexed into the system stream.

Does the file play back properly with mplayer on a normal Linux x86 
machine? You might try playing with mpeg2dec and the "-s0" option to see 
if it's a program stream that you need to extract the video from.

Or can you post one of these files to the Web? We can take a look and tell 
you what's going on if you do that.

Best,
Keith

On Wed, 15 Jul 2009, Gus Issa wrote:

> Hello,
>  
> I have ported libmpeg2 to a small project running on 200Mhz ARM9. I must
> say it runs really fast, about 100 frames/sec for 320x240!
> The only problem I am having is errors in the generated frames. The
> pictures has too many little squares in it. They are randomly placed and
> of different sizes. It looks like just if I was receiving a bad MPEG file
> but I know my file is fine because I tried many files of different
> settings and I always get same thing (MPEG1 and MPEG2)
>  
> I am outputting a 16bit RGB to my display and using sample2.c file.
>  
> Any hints on what am I doing wrong or what file is responsible for this
> error would really help me. I tried standard and ARM motion_comp files
> and standard and ARM idct files but I always get the same results so I am
> assuming the error is not in motion or in idct?! I do not know anything
> about video compression.
>  
> Gus
> 
>