[vlc] VLC does not initialize V4L/bttv sound

[Ian B. MacDonald]

Hey vlc list,

My problem: 

VLC does not start sound output on my V4L device (bttv card). As a
result, the stream contains encoded 'empty' sound from /dev/dsp.  The
picture is clear demonstrating that the bttv tuner is fine, and the
video is being captured by the vlc.

Normally the sound is heard on /dev/dsp (and external speakers) via an
internal cable between the bttvcard and the sound card.  Other V4L
applications that use the bttv card (xawtv) generate sound on /dev/dsp
without any issues.

Is the bttv audio (TDA9850) not initiated because the audio device for
encoding is /dev/dsp?

Any help with this appreciated,
Ian.


My config:

Debian woody with the vlc packages from sid.
ii  vlc             0.7.0-3     
ii  vlc-plugin-alsa 0.7.0-3 

I have a 2.4.24 configuration, and a 2.6.2 configuration, both dmesgs
are at the bottom of the email.

The command I use to initiate the vlc client for streaming from an http
url:

vlc -vvv
v4l2:/dev/video:norm=ntsc:frequency=6356.2:size=320x240:channel=0:adev=/dev/dsp:audio=1 --sout '#transcode{vcodec=mp4v,acodec=a52,vb=250,ab=48,deinterlace}:std{access=http,mux=ts,url=192.168.77.20:8080}' --ttl 12

Output from the VLC client when starting up:

VideoLAN Client 0.7.0 Bond
[00000000] main root debug: VLC media player - version 0.7.0 Bond - (c)
1996-2003 VideoLAN
[00000000] main root debug: libvlc was configured with ./configure
--mandir=/share/man --infodir=/share/info --enable-release --prefix=/usr
--enable-gnome --enable-gtk --disable-familiar --disable-fb --enable-ggi
--enable-sdl --enable-esd --enable-qt --enable-mad --enable-arts
--enable-alsa --enable-lirc --enable-a52 --enable-aa --enable-dvbpsi
--enable-xosd --enable-mozilla --enable-kde --enable-mp4 --enable-dvb
--enable-dv --disable-satellite --enable-ogg --enable-vorbis
--enable-wxwindows --enable-slp --enable-flac --enable-skins
--disable-basic-skins --enable-freetype --enable-mkv --enable-v4l
--enable-pvr --enable-speex --enable-caca --enable-ffmpeg
--with-ffmpeg-tree=extras/ffmpeg --enable-faad
--with-faad-tree=extras/faad2 --enable-libmpeg2
--with-libmpeg2-tree=extras/mpeg2dec --enable-glide --enable-svgalib
--enable-dvd --without-dvdcss --no-create --no-recursion
[00000001] main vlc debug: translation test: code is "C"
[00000001] main vlc debug: opening config file /root/.vlc/vlcrc
[00000001] main vlc debug: checking builtin modules
[00000001] main vlc debug: checking plugin modules
[00000001] main vlc debug: recursively browsing `modules'
[00000001] main vlc debug: recursively browsing `/usr/lib/vlc'
[00000001] main vlc debug: recursively browsing `plugins'
[00000001] main vlc debug: module bank initialized, found 152 modules
[00000001] main vlc debug: opening config file /root/.vlc/vlcrc
[00000001] main vlc debug: CPU has capabilities 486 586 MMX MMXEXT SSE
FPU
[00000001] main vlc debug: looking for memcpy module
[00000001] main vlc debug: probing 3 candidates
[00000010] main module debug: using memcpy module "memcpymmxext"
[00000185] main playlist debug: Creating group Normal with id 1 at
position 0
[00000185] main playlist debug: waiting for thread completion
[00000185] main playlist debug: thread 1096010672 (playlist) created at
priority 0 (src/playlist/playlist.c:98)
[00000186] main interface debug: looking for interface module
[00000186] main interface debug: probing 1 candidate
[00000046] main module debug: using interface module "hotkeys"
[00000186] main interface debug: interface initialized
[00000186] main interface debug: thread 1104399280 (interface) created
at priority 0 (src/interface/interface.c:161)
[00000185] main playlist debug: adding playlist item
v4l:/dev/video:norm=ntsc:frequency=361250:size=320x240:channel=0:adev=/dev/dsp:audio=1  (v4l:/dev/video:norm=ntsc:frequency=361250:size=320x240:channel=0:adev=/dev/dsp:audio=1)
[00000185] main playlist debug: creating new input thread
[00000187] main input: playlist item
`v4l:/dev/video:norm=ntsc:frequency=361250:size=320x240:channel=0:adev=/dev/dsp:audio=1'
[00000187] main input debug: waiting for thread completion
[00000187] main input debug: access `v4l', demux `', name
`/dev/video:norm=ntsc:frequency=361250:size=320x240:channel=0:adev=/dev/dsp:audio=1'
[00000188] main stream output debug: stream=`transcode'
[00000189] main private debug: looking for sout stream module
[00000189] main private debug: probing 1 candidate
[00000188] main stream output debug: stream=`std'
[00000190] main private debug: looking for sout stream module
[00000190] main private debug: probing 1 candidate
[00000190] stream_out_standard private debug: creating
`http/ts://192.168.77.20:8000'
[00000190] stream_out_standard private debug: extention is 20:8000
[00000190] stream_out_standard private debug: extention -> mux=(null)
[00000190] stream_out_standard private debug: using
`http/ts://192.168.77.20:8000'
[00000191] main private debug: looking for sout access module
[00000191] main private debug: probing 1 candidate
[00000191] access_output_http private: creating new http daemon
[00000192] main private debug: looking for httpd module
[00000192] main private debug: probing 1 candidate
[00000193] httpd private: httpd started
[00000193] main private debug: thread 1121176496 (httpd thread) created
at priority 0 (httpd.c:330)[00000192] httpd private: http thread
launched
[00000028] main module debug: using httpd module "httpd"
[00000050] main module debug: using sout access module
"access_output_http"
[00000190] stream_out_standard private debug: access opened
[00000194] main private debug: looking for sout mux module
[00000194] main private debug: probing 2 candidates
[00000194] mux_ts_dvbpsi private debug: Open
[00000194] mux_ts_dvbpsi private debug: caching=200000 pcr=30000
[00000025] main module debug: using sout mux module "mux_ts_dvbpsi"
[00000188] main stream output debug: muxer support adding stream at any
time
[00000190] stream_out_standard private debug: mux opened
[00000148] main module debug: using sout stream module
"stream_out_standard"
[00000189] stream_out_transcode private debug: codec audio=a52  0Hz 0
channels 46Kb/s
[00000189] stream_out_transcode private debug: codec video=mp4v 0x0
scaling: 1.000000 244kb/s
[00000015] main module debug: using sout stream module
"stream_out_transcode"
[00000187] main input debug: looking for access module
[00000187] main input debug: probing 8 candidates
[00000187] v4l input debug: WxH 320x240
[00000187] v4l input debug: main device=`/dev/video'
[00000187] v4l input debug: V4L device BT848A video (STB, Gateway P/N  3
channels 1 audios 48 < w < 768 32 < h < 480
[00000187] v4l input debug: invalid audio, falling back with no audio
[00000187] v4l input debug: setting channel Television(0) 1 tuners
flags=0x3 type=0x1 norm=0x1
[00000187] main input debug: thread 1112787888 (input) created at
priority 0 (src/input/input.c:257)
[00000187] main input debug: cmd=state old=10 new=1
[00000187] main input debug: playing at normal rate
[00000195] main interface debug: looking for interface module
[00000195] main interface debug: probing 3 candidates
remote control interface initialized, `h' for help
[00000043] main module debug: using interface module "rc"
[00000195] main interface debug: interface initialized
[00000195] main interface debug: thread 1134816176 (manager) created at
priority 0 (src/interface/interface.c:145)
[00000187] v4l input debug: frequency 361250 (5780)
[00000187] v4l input debug: v4l device uses frame size: 307200
[00000187] v4l input debug: v4l device uses chroma: RV24
[00000187] v4l input debug: openened adev=`/dev/dsp' stereo 44100Hz
[00000187] v4l input: v4l grabbing started
[00000110] main module debug: using access module "v4l"
[00000187] main input debug: looking for demux module
[00000187] main input debug: probing 20 candidates
[00000187] mp4 input warning: MP4 plugin discarded (not a valid file)
[00000187] avi input warning: avi module discarded (invalid header)
[00000187] asf input warning: ASF plugin discarded (not a valid file)
[00000187] v4l input debug: added new video es RV24 320x240
[00000187] v4l input debug: new audio es 2 channels 44100Hz
[00000111] main module debug: using demux module "v4l"
[00000187] main input debug: selecting ES 0x1
[00000197] main packetizer debug: looking for packetizer module
[00000197] main packetizer debug: probing 22 candidates
[00000074] main module debug: using packetizer module "rawvideo"
[00000197] main packetizer debug: thread 1160244144 (decoder) created at
priority 0 (src/input/input_dec.c:166)
[00000187] main input debug: selecting ES 0x2
[00000198] main packetizer debug: looking for packetizer module
[00000198] main packetizer debug: probing 22 candidates
[00000180] main module debug: using packetizer module "packetizer_copy"
[00000198] main packetizer debug: thread 1168632752 (decoder) created at
priority 0 (src/input/input_dec.c:166)
[00000188] main stream output debug: adding a new input
[00000189] stream_out_transcode private debug: creating video
transcoding from fcc=`RV24' to fcc=`mp4v'
[00000199] main encoder debug: looking for encoder module
[00000199] main encoder debug: probing 10 candidates
[00000199] ffmpeg encoder debug: libavcodec initialized (interface 4698
)
[00000199] ffmpeg encoder debug: found encoder MPEG-4
[00000014] main module debug: using encoder module "ffmpeg"
[00000014] main module debug: unlocking module "ffmpeg"
[00000199] main encoder debug: looking for encoder module
[00000199] main encoder debug: probing 10 candidates
[00000199] ffmpeg encoder debug: libavcodec already initialized
[00000199] ffmpeg encoder debug: found encoder MPEG-4
[00000014] main module debug: using encoder module "ffmpeg"
[00000194] main private debug: adding a new input
[00000194] mux_ts_dvbpsi private debug: adding input codec=mp4v pid=68
[00000194] mux_ts_dvbpsi private debug: new PCR PID is 68
[00000188] main stream output debug: adding a new input
[00000189] stream_out_transcode private debug: creating audio
transcoding from fcc=`s16l' to fcc=`a52 '
[00000200] main encoder debug: looking for encoder module
[00000200] main encoder debug: probing 10 candidates
[00000200] ffmpeg encoder debug: libavcodec already initialized
[00000200] ffmpeg encoder debug: found encoder A52 Audio (aka AC3)
[00000014] main module debug: using encoder module "ffmpeg"
[00000194] main private debug: adding a new input
[00000194] mux_ts_dvbpsi private debug: adding input codec=a52  pid=69



2.4.24 DMESG:
i2c-core.o: i2c core module
i2c-dev.o: i2c /dev entries driver module
i2c-core.o: driver i2c-dev dummy driver registered.
i2c-algo-bit.o: i2c bit algorithm module
i2c-core.o: driver i2c TV tuner driver registered.
bttv: driver version 0.7.108 loaded
bttv: using 4 buffers with 2080k (8320k total) for capture
bttv: Bt8xx card found (0).
bttv0: Bt848 (rev 18) at 01:0b.0, irq: 18, latency: 132, mmio:
0xf4200000
bttv0: using: STB, Gateway P/N 6000699 (bt848) [card=3,insmod option]
i2c-dev.o: Registered 'bt848 #0' as minor 0
tuner: chip found @ 0xc0
tuner(bttv): type forced to 6 (Temic NTSC (4032 FY5)) [insmod]
i2c-core.o: client [Temic NTSC (4032 FY5)] registered to adapter [bt848
#0](pos. 0).
i2c-core.o: adapter bt848 #0 registered as adapter 0.
bttv0: using tuner=2
tuner: type already set (6)
bttv0: i2c: checking for TDA9875 @ 0xb0... not found
bttv0: i2c: checking for TDA7432 @ 0x8a... not found
tvaudio: TV audio decoder + audio/video mux driver
tvaudio: known chips:
tda9840,tda9873h,tda9874h/a,tda9850,tda9855,tea6300,tea6420,tda8425,pic16c54 (PV951),ta8874z
i2c-core.o: driver generic i2c audio driver registered.
tvaudio: found tda9850 @ 0xb6
tuner: type already set (6)
i2c-core.o: client [tda9850] registered to adapter [bt848 #0](pos. 1).
bttv0: PLL: 28636363 => 35468950 .. ok
bttv0: registered device video0
bttv0: registered device vbi0
bttv0: registered device radio0

Linux 2.6.2 DMESG Output:
bttv: driver version 0.9.12 loaded
bttv: using 8 buffers with 2080k (520 pages) each for capture
bttv: Bt8xx card found (0).
bttv0: Bt848 (rev 18) at 0000:01:0b.0, irq: 185, latency: 132, mmio:
0xf4200000
bttv0: using: STB, Gateway P/N 6000699 (bt848) [card=3,insmod option]
bttv0: gpio: en=00000000, out=00000000 in=00ffffff [init]
tuner: chip found @ 0xc0
tuner: type forced to -1 (<NULL>) [insmod]
tuner: type set to 6 (Temic NTSC (4032 FY5))
bttv0: using tuner=2
tuner: type already set (6)
bttv0: i2c: checking for TDA9875 @ 0xb0... not found
bttv0: i2c: checking for TDA7432 @ 0x8a... not found
tvaudio: TV audio decoder + audio/video mux driver
tvaudio: known chips:
tda9840,tda9873h,tda9874h/a,tda9850,tda9855,tea6300,tea6420,tda8425,pic16c54
(PV951),ta8874z
tvaudio: found tda9850 @ 0xb6
tuner: type already set (6)
bttv0: registered device video0
bttv0: registered device vbi0
bttv0: registered device radio0
bttv0: PLL: 28636363 => 35468950 .. ok



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