[MPlayer-dev-eng] [PATCH] missing marker bit

Christoph Egger Christoph_Egger at gmx.de
Thu Dec 9 20:28:37 CET 2004


> Rejected.
> 
> You have not provided sample(s).

Do you really expect me to attach several videos
with about 100MB each ?

I don't think so.

Thus, I provided the mplayer console output which showed
that mplayer detected and played the video.

> How could you be sure that only the marker bit is broken?

I'm not sure. I have two MPEG-PS musicvideos with the
'missing marker bit' and mplayer makes no troubles.

> After all it is the only check for this header.

Well, it plays the videos nicely with my patch. And that's enough
for every user. It may be that this or that pixel is shown wrong, but
hey, do your eyes make notice of them ?

> If only the beginning is broken then mplayer should advance until
> it finds good header.

If a good header exists at all. The question is, is this bit really
needed ? mplayer seems to detect the mpeg format nonetheless.


> If the samples are encoded with bad encoder, then I'm sorry for you.

I take this as 'use Xine or VLC if you are not happy with mplayer'.
The videos have been captured from TV, btw ...

> 
> Wish You Best
>    Ivan Kalvachev
>   iive
> 
> 
> On Wed, 8 Dec 2004 16:11:11 +0100 (MET)
> "Christoph Egger" <Christoph_Egger at gmx.de> wrote:
> 
> > 
> > Hello!
> > 
> > 
> > Synopsis:
> > 
> > When mplayer should player a mpeg video, some of them result
> > in this:
> > 
> > MPEG-PS file format detected.
> > missing marker bit!
> > MPEG: bad sequence header
> > Video: Cannot read properties.
> >
> ==========================================================================
> > Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
> > AUDIO: 48000 Hz, 2 ch, 16 bit (0x20), ratio: 24000->192000 (192.0 kbit)
> > Selected audio codec: [mp3] afm:mp3lib (mp3lib MPEG layer-2, layer-3)
> >
> ==========================================================================
> > ...
> > 
> > and mplayer only plays the audio, but not the video.
> > 
> > VLC and Xine also claim about the missing marker bit, but
> > nonetheless they play the video.
> > 
> > With the attached patch, mplayer can do this, too.
> > 
> > This is the output with the patch:
> > 

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