[MPlayer-users] demux_real: invalid chunksize! (0) with certain RealAudio / COOK codec streams

[Antonio Olivares]

--- On Wed, 3/18/09, Niemeyer Matthias <NIM at colenco.ch> wrote:

> From: Niemeyer Matthias <NIM at colenco.ch>
> Subject: [MPlayer-users] demux_real: invalid chunksize! (0) with certain RealAudio / COOK codec streams
> To: mplayer-users at mplayerhq.hu
> Date: Wednesday, March 18, 2009, 1:57 PM
> The actual version of mplayer (Build SVN-r28994-4.3.2)
> cannot handle certain Real-Audio streams using the COOK
> codec. Some days ago, Radio Ukraina
> 
> rtsp://real.nrcu.gov.ua:7553/encoder/ru1channel.rm
> 
> changed their streams from the SIPRO to the COOK codec and
> enhanced the bandwidth from 16k to 20k. Since then, I can
> here it with better quality from my hardware-internet radio
> (blik radio station) and also using RealPlayer GOLD 11, but
> mplayer fails. 
> 
> mplayer rtsp://real.nrcu.gov.ua:7553/encoder/ru1channel.rm
> 
> gives the message 
> 
> demux_real: invalid chunksize! (0)
> 
> The program keeps hanging until I stop it with Ctrl-C. The
> whole message output (sorry, it's compiled in German
> language) is:
> 
> Konnte Namen für AF_INET6 nicht auflösen:
> real.nrcu.gov.ua
> 
> Löse real.nrcu.gov.ua auf für AF_INET...
> 
> Verbinde mit Server real.nrcu.gov.ua[212.26.129.196]:7553
> ...
> 
> Cache-Größe auf 640 KByte gesetzt.
> 
> Fülle Zwischenpuffer: 18.75% (122880 Bytes) 
> 
> REAL-Dateiformat erkannt!
> 
> Stream description: Audio Stream
> 
> Stream mimetype: audio/x-pn-multirate-realaudio-live
> 
> [real] Audiostream gefunden, -aid 0
> 
> demux_real: invalid chunksize! (0)
> 
>  
> 
> MPlayer wurde durch Signal 2 im Modul demux_open
> unterbrochen.
> 
>  
> 
> MPlayer wurde durch Signal 2 im Modul enable_cache
> unterbrochen.
> 
> rtsp: read error.
> 
> realrtsp: rdt chunk not recognized: got 0x51
> 
> realrtsp: rdt chunk not recognized: got 0xf8
> 
> RM: Kein Audiostream gefunden. -> kein Ton.
> 
> Clip-Info:
> 
> name: Radio Ukraine The First Channel
> 
> ==========================================================================
> 
> Öffne Audiodecoder: [ffmpeg] FFmpeg/libavcodec audio
> decoders
> 
> AUDIO: 44100 Hz, 1 ch, s16le, 20.7 kbit/2.93% (ratio:
> 2584->88200)
> 
> Ausgewählter Audiocodec: [ffcook] afm: ffmpeg (FFmpeg COOK
> audio)
> 
> ==========================================================================
> 
> [AO OSS] audio_setup: Kann Audiogerät /dev/dsp nicht
> öffnen: Permission denied
> 
> ao_nas: init(): Can't open nas audio server ->
> nosound
> 
> DVB card number must be between 1 and 4
> 
> AO: [null] 44100Hz 1ch s16le (2 bytes per sample)
> 
> Video: kein Video
> 
> Starte Wiedergabe...
> 
> A: 0.0 (unknown) of 0.0 (unknown) ??,?% 0% 
> 
> Beenden... (Ende)
> 
> The same error already occured with Mplayer
> SVN-r28519-4.3.2 (Feb 10, 2009) and even with version
> 1.0rc2-4.2.1 (Windows XP from the year 2007). What is quite
> strange is that MPlayer 0.90rc4-3.3 (suse-linux, 2003) can
> handle the stream data without problems.
> 
> I can also dump the stream to file using the -dumpfile
> option of the actual mplayer, but I can play this recorded
> stream only with RealPlayer, not with mplayer.
> 
> It looks like a bug to me, and I'd be glad if you could
> fix it.
> 
> Kind regards
> 
> Matthias
> 
> _______________________________________________
> MPlayer-users mailing list
> MPlayer-users at mplayerhq.hu
> https://lists.mplayerhq.hu/mailman/listinfo/mplayer-users

Matthias,

I confirm your report.  I have mplayer installed with the essential codecs, (might make a difference if you have the all-codecs tarball?).
running Fedora 10 with mplayer svn compiled from source

[olivares at localhost ~]$ mplayer rtsp://real.nrcu.gov.ua:7553/encoder/ru1channel.rm
MPlayer SVN-r28974-4.3.2 (C) 2000-2009 MPlayer Team

Playing rtsp://real.nrcu.gov.ua:7553/encoder/ru1channel.rm.
Resolving real.nrcu.gov.ua for AF_INET6...
Couldn't resolve name for AF_INET6: real.nrcu.gov.ua
Resolving real.nrcu.gov.ua for AF_INET...
Connecting to server real.nrcu.gov.ua[212.26.129.196]: 7553...
Cache size set to 640 KBytes
Cache fill: 18.75% (122880 bytes)   
REAL file format detected.
Stream description: Audio Stream
Stream mimetype: audio/x-pn-multirate-realaudio-live
[real] Audio stream found, -aid 0
demux_real: invalid chunksize! (0)


MPlayer interrupted by signal 2 in module: enable_cache
rtsp: read error.


MPlayer interrupted by signal 2 in module: demux_open
realrtsp: rdt chunk not recognized: got 0x1f
realrtsp: rdt chunk not recognized: got 0xd8
RM: No audio stream found -> no sound.
Clip info:
 name: Radio Ukraine The First Channel
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 44100 Hz, 1 ch, s16le, 20.7 kbit/2.93% (ratio: 2584->88200)
Selected audio codec: [ffcook] afm: ffmpeg (FFmpeg COOK audio)
==========================================================================
AO: [oss] 44100Hz 1ch s16le (2 bytes per sample)
Video: no video
Starting playback...
A:   0.0 (unknown) of 0.0 (unknown) ??,?% 0% 
Exiting... (Quit)


Interesting!

Regards,

Antonio