[MPlayer-dev-eng] My second example: PCM u-law audio, and H.263+ video

Tue Aug 6 23:07:08 CEST 2002

My second example attempts to play a stream (actually, a pair of RTP 
streams) that consists of PCM u-law audio, and H.263+ video:

mplayer -V 
rtsp://darwin.horizonlive.com:554/finlayson/sample-h263-ulaw-8000.mov

Again, here's my output.  (See my comments, starting with "#####ROSS:")

MPlayer CVS-020805-21:00-2.95.3 (C) 2000-2002 Arpad Gereoffy (see DOCS!)

CPU: Intel Celeron A Mendocino/Pentium II Dixon (Family: 6, Stepping: 10) 
CPUflags:  MMX: 1 MMX2: 0 3DNow: 0 3DNow2: 0 SSE: 0 SSE2: 0 Compiled for 
x86 CPU with extensions: MMX

Reading /home/rsf/.mplayer/codecs.conf: 38 audio & 104 video codecs 
CommandLine:get_path('font/font.desc') -> 
'/home/rsf/.mplayer/font/font.desc'  '-V' 
'rtsp://darwin.horizonlive.com:554/finlayson/sample-h263-ulaw-8000.mov' 
Using MMX Optimized OnScreenDisplay
font: can't open file: /home/rsf/.mplayer/font/font.desc font: can't open 
file: /usr/local/share/mplayer/font/font.desc Linux RTC init error: No such 
device
Using usleep() timing
get_path('input.conf') -> '/home/rsf/.mplayer/input.conf' Can't open input 
config file /home/rsf/.mplayer/input.conf : No such file or directory Can't 
open input config file /usr/local/share/mplayer/input.conf : No such file 
or directory Falling back on default (hardcoded) input config

Playing 
rtsp://darwin.horizonlive.com:554/finlayson/sample-h263-ulaw-8000.mov 
Connected to server: darwin.horizonlive.com Stream not seekable!
Sending request: DESCRIBE 
rtsp://darwin.horizonlive.com:554/finlayson/sample-h263-ulaw-8000.mov 
RTSP/1.0 CSeq: 1
Accept: application/sdp

Received DESCRIBE response: RTSP/1.0 200 OK Server: DSS/3.0.1 [v338]-Linux
Cseq: 1
Last-Modified: Wed, 26 Sep 2001 15:38:33 GMT Cache-Control: must-revalidate
Content-length: 297
Date: Tue, 06 Aug 2002 17:40:53 GMT
Expires: Tue, 06 Aug 2002 17:40:53 GMT
Content-Type: application/sdp
x-Accept-Retransmit: our-retransmit
Content-Base: 
rtsp://darwin.horizonlive.com:554/finlayson/sample-h263-ulaw-8000.mov/

v=0
s=/finlayson/sample-h263-ulaw-8000.mov
u=http:///
e=admin@
c=IN IP4 208.185.32.22
a=control:*
b=AS:528
a=range:npt=0-  37.40333
m=video 0 RTP/AVP 96
b=AS:464
a=rtpmap:96 H263-1998/90000
a=control:trackID=3
a=cliprect:0,0,180,240
m=audio 0 RTP/AVP 0
b=AS:63
a=control:trackID=4

#####ROSS: Note: The second "0" in the "m=audio" line specifies PCM u-law
#####ROSS: and the "a=rtpmap:" line specifies H.263+

Initiated "video/H263-1998" RTP subsession Sending request: SETUP 
rtsp://darwin.horizonlive.com:554/finlayson/sample-h263-ulaw-8000.mov/trackID=3 
RTSP/1.0 CSeq: 2
Transport: RTP/AVP;unicast;client_port=1030-1031

Received SETUP response: RTSP/1.0 200 OK Server: DSS/3.0.1 [v338]-Linux
Cseq: 2
Last-Modified: Wed, 26 Sep 2001 15:38:33 GMT Cache-Control: must-revalidate
Session: 6499912693745355226
Date: Tue, 06 Aug 2002 17:40:53 GMT
Expires: Tue, 06 Aug 2002 17:40:53 GMT
Transport: 
RTP/AVP;unicast;client_port=1030-1031;source=208.185.32.22;server_port=6970-6971

Sending request: PLAY 
rtsp://darwin.horizonlive.com:554/finlayson/sample-h263-ulaw-8000.mov/trackID=3 
RTSP/1.0 CSeq: 3
Session: 6499912693745355226
Range: npt=0-

Received PLAY response: RTSP/1.0 200 OK Server: DSS/3.0.1 [v338]-Linux
Cseq: 3
Session: 6499912693745355226
RTP-Info: url=trackID=3;seq=59106;ssrc=748942514;rtptime=1119541523

==> Found video stream: 0
Initiated "audio/PCMU" RTP subsession
Sending request: SETUP 
rtsp://darwin.horizonlive.com:554/finlayson/sample-h263-ulaw-8000.mov/trackID=4 
RTSP/1.0 CSeq: 4
Transport: RTP/AVP;unicast;client_port=1032-1033

Received SETUP response: RTSP/1.0 200 OK Server: DSS/3.0.1 [v338]-Linux
Cseq: 4
Last-Modified: Wed, 26 Sep 2001 15:38:33 GMT Cache-Control: must-revalidate
Session: 528002252947190111
Date: Tue, 06 Aug 2002 17:40:53 GMT
Expires: Tue, 06 Aug 2002 17:40:53 GMT
Transport: 
RTP/AVP;unicast;client_port=1032-1033;source=208.185.32.22;server_port=6970-6971

Sending request: PLAY 
rtsp://darwin.horizonlive.com:554/finlayson/sample-h263-ulaw-8000.mov/trackID=4 
RTSP/1.0 CSeq: 5
Session: 528002252947190111
Range: npt=0-

Received PLAY response: RTSP/1.0 200 OK Server: DSS/3.0.1 [v338]-Linux
Cseq: 5
Session: 528002252947190111
RTP-Info: url=trackID=4;seq=53254;ssrc=1688519499;rtptime=1739930011

#####ROSS: At this point, my code ("libmpdemux/demux_rtp.cpp") allocates
#####ROSS: a "sh_audio_t" structure, and sets its "format" field to 0x7
#####ROSS: (to specify PCM u-law)
#####ROSS: It also allocates a "sh_video_t" structure, and sets its 
"format" field
#####ROSS: to mmioFOURCC('H','2','6','3')

==> Found audio stream: 0
[V] filefmt:21  fourcc:0x33363248  size:0x0  fps: 0.00  ftime:=0.0000 FPS 
not specified (or invalid) in the header! Use the -fps option!

#####ROSS: The code should really be able to figure out the frame rate by 
itself.
#####ROSS: In general, for RTSP-initiated streams like this, the user will not
#####ROSS: know the frame rate in advance, so it's inconvenient to force him
#####ROSS: to specifiy this on the mplayer command line.
#####ROSS: Note that QuickTime Player can play this RTSP URL OK, without
#####ROSS: having to be told the frame rate.

Detected audio codec: [ulaw] afm:5 (uLaw) Initializing audio codec...
Opening audio decoder: [alaw] aLaw/uLaw audio decoder dec_audio: Allocating 
2048 + 65536 = 67584 bytes for output buffer Unknown/missing audio format, 
using nosound uninit audio: 5
Couldn't initialize audio codec! -> nosound Audio: no sound!!!

#####ROSS: Why is the audio codec initialization failing here??

Freeing 0 unused audio chunks
Video: no video!!!
Freeing 0 unused video chunks

vo: x11 uninit called but X11 not inited..

Exiting... (End of file)