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

[Niemeyer Matthias]

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