[MPlayer-users] Problem with vdr recordings of a particular station

[Matthias Schwarzott]

On Friday 18 March 2005 10:51, Nico Sabbi wrote:
> Kai Schaeffer wrote:
> > Hello,
> >
> > I am using mplayer to view the vdr records of my Linux server (it has
> > a DVB-T card). It is working well so far but with the recordings of a
> > particular station (SAT-1) I have some problems. Some recordings are
> > working well, with some I have no audio and with some mplayer is
> > crashing. Mostly I have no audio. At the end of the mail you found a
> > debug output for a crash. I should say that I created the debug output
> > on my Linux machine, but there it was easier than on my Windows
> > machine and I have the same behavior. Then I had the plan to extract a
> > little part of the crashing file and upload it to your FTP-Server that
> > you can check it out by yourself. But then it got really strange: The
> > small file (5MB) was working, with no audio but no crash. Then I tried
> > different sizes. Some sizes (20MB for instance) are working perfect
> > (with audio), some are crashing and most have no audio. I upload the
> > 5MB file (name: Kai.vdr) to your ftp-server. So please tell me if you
> > would like me to upload another size. Sorry, I wasn't able to produce
> > a small file that is crashing.
> >
> > Thank you
> > Kai
>
> [snip]
>
> > 0x1BD substream: 0x4E Unknown 0x1BD substream: 0x7F Unknown 0x1BD
> > substream: 0xF6 Unknown 0x1BD substream: 0xF2 ==> Found audio stream: 133
> > ==> Found audio stream: 130
> > Unknown 0x1BD substream: 0x65 Unknown 0x1BD substream: 0x72 Unknown
> > 0x1BD substream: 0xEF Unknown 0x1BD substream: 0xE3 Unknown 0x1BD
> > substream: 0x7F Unknown 0x1BD substream: 0x76 Maybe you are playing a
> > non-interleaved stream/file or the codec failed?
> > For AVI files, try to force non-interleaved mode with the -ni option.
> > ds_fill_buffer: EOF reached (stream: audio) MPEG: No audio stream
> > found -> no sound.
> > Searching for sequence header... OK!
> > VIDEO:  MPEG2  720x576  (aspect 2)  25.000 fps  15000.0 kbps (1875.0
> > kbyte/s)
> > [V] filefmt:2  fourcc:0x10000002  size:720x576  fps:25.00  ftime:=0.0400
> > get_path('sub/') -> '/root/.mplayer/sub/'
> > get_path('default.sub') -> '/root/.mplayer/default.sub'
> > =========================================================================
> >=
> >
> > Opening audio decoder: [pcm] Uncompressed PCM audio decoder
> > dec_audio: Allocating 2048 + 65536 = 67584 bytes for output buffer.
> >
> > Program received signal SIGSEGV, Segmentation fault.
> > [Switching to Thread 16384 (LWP 16299)]
> > init (sh_audio=0x85ac788) at ad_pcm.c:23
> > 23      sh_audio->i_bps=h->nAvgBytesPerSec;
> > #0  init (sh_audio=0x85ac788) at ad_pcm.c:23
> > #1  0x080c4bde in init_audio_codec (sh_audio=0x85ac788) at dec_audio.c:82
> > #2  0x080c4ea2 in init_audio (sh_audio=0x85ac788, codecname=0x0, afm=0x0,
> >    status=1) at dec_audio.c:172
> > #3  0x080c507a in init_best_audio_codec (sh_audio=0x85ac788,
> >    audio_codec_list=0xbfffe464, audio_fm_list=0x0) at dec_audio.c:217
> > #4  0x08075198 in main (argc=3, argv=0xbffff7d4) at mplayer.c:1923
> > Dump of assembler code from 0x80c6e92 to 0x80c6ed2:
> > 0x080c6e92 <decode_audio+82>:    les    (%ecx,%ecx,4),%edx
> > 0x080c6e95 <decode_audio+85>:    enter  $0xc95b,$0xc3
>
> the demuxer is identifying the audio stream as LPCM, instead very likely
> it's AC3.
> it seems we should check the pes_is_aligned flag in the pes header,
> before analyzing the payload.
> There are other things I don't like in demux_mpg, so if/when I have time
> I will post a patch.
>
> In any case, why don't you convince Klaus to drop that horrible file
> format that is .vdr
I think this wrong substream-headers have been corrected in newer versions.

> and save exactly what comes out of the card (mpeg-ts) ? .vdr can't be
> edited and is neither -ps nor -ts,
> so you lose the scr and gain nothing at all (except troubles).
>
>     Nico

The attached patch should autodetect this wrong substream-format.

Matthias
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