[vlc-devel] Re: Strange descriptorLength fields in SL over TS

[Laurent Aimar]

On Mon, Mar 14, 2005, Nico Sabbi wrote:
> Hi,
> yesterday, testing my SL demuxer with VLC, I found very strange
> descriptorLength values in the IOD:
> the length of the outermost descriptor was 67 bytes, while the length
> of the first descriptor contained therein was 49000+.
> Since my demuxer is very new I controlled the code, but it seems to
> be correct, basically a plain uvlc reader:
> 
> value = 0;
> i = 0;
> while(1)
> {
>    value |= buf[i] & 0x7f:
>    if(buf[i] & 0x80)
>    {
>        value <<= 7;
>        i++;   
>    }
>    else
>       break;
> }
> 
> I also made a dump of the input bytes, and they were sequences of
> 0xff 0xff 0xf7 ... ... (<0x80)
> and  so on. I don't have the dump right now, but I can post it tonight 
> if needed.
> 
> Is it possible there's some bug in the uvlc coder, or that the IOD 
> generated by VLC
> has some unusual coding?
 The iod generated by vlc hasn't (really )been tested, so it has
probably bugs (anyway vlc generates invalid TS with mpeg4 audio)

-- 
fenrir

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