This seems to be the sipro codec. I haven't actually found a sipro file that *will* play. All I get is: ... Chunk: MDPR (5250444d) (size: 0x9b, offset: 0x128) Found new stream (id: 0) skip_str: 16 bytes skipped skip_str: 20 bytes skipped demux_real: type_spec: len=73 fpos=0x17A first_dword=0x2E7261FD (ưar.) ==> Found audio stream: 0 Found audio stream! version: 4 00 00 2E 72 61 34 10 01 A1 B0 00 04 00 00 00 39 00 00 01 40 00 03 9A 80 00 01 D4 C0 00 01 D4 C0 frame_size: 320 sub_packet_size: 0 00 00 00 00 samplerate: 16000, channels: 1 skip_str: 4 bytes skipped read_str: 4 bytes read Audio: Real's GeneralCooker (?) (RealAudio G2?) (unsupported) ======= WAVE Format ======= Format Tag: 26995 (0x6973) Channels: 1 Samplerate: 16000 avg byte/sec: 16100 Block align: 320 bits/sample: 16 cbSize: 30 Unknown extra header dump: [0] [0] [6] [0] [3] [0] [1] [7] [0] [0] [0] [0] [0] [44] [41] [54] [41] [0] [3] [bd] [2a] [0] [0] [0] [0] [2] [e2] [0] [0] [0] ### skipping -17 bytes of codec info Chunk: DATA (41544144) (size: 0x3bd2a, offset: 0x1c3) Packets in file: 738 Clip info: name: Opening Sequence - audio author: System Shock copyright: ©1994 Origin - An Electronic Arts Company comment: RealEncoder 5.1.0.32 Win95 4.0 950 Pentium 1 Live = 0 ac = 16 Kbps Voice - Wideband abw = 16.0 asi = 22050 abi = 16 abo = 16 ach = 1 ========================================================================== Opening audio decoder: [realaud] RealAudio decoder Decoder init failed, error code: 0x8004000F ADecoder preinit failed :( ADecoder init failed :( get_path('codecs.conf') -> '/home/glyn/.mplayer/codecs.conf' *** Try to upgrade /home/glyn/.mplayer/codecs.conf from etc/codecs.conf *** If it still does not work, read DOCS/codecs.html! Can't find codec for audio format 0x72706973! ========================================================================== Audio: no sound!!! Freeing 0 unused audio chunks ... glyn.kennington@hertford.oxford.ac.uk