Thank you for responding!
I couldn't get a pcm stream from video24 (nothing streaming, makes 0b
files), but video32 gave me the most interesting, rhythmic noise.
Trent Reznor would remix it into something amazing.
Obviously, it encoded something other than silence, but I don't have
any idea what it tried to encode. xxd ouput a lot of random hex.
I also tried "cat /dev/video0 > foo.mpeg" which produced a video
stream with no audio. I also put that through aplay (maybe no such a
good idea...) only to hear a magnificent hiss.
Status Log: # While inactive
[ 1574.986972] ivtv0: ================= START STATUS CARD #0
=================
[ 1574.986981] ivtv0: Version: 1.4.1 Card: I/O Data GV-MVP/RX,
GV-MVP/RX2W (dual tuner)
[ 1574.986991] ivtv0: GPIO status: DIR=0xc301 OUT=0x0200 IN=0x121e
[ 1574.986996] saa7115 2-0021: Audio frequency: 48000 Hz
[ 1574.988810] saa7115 2-0021: Input: S-Video 0
[ 1574.988814] saa7115 2-0021: Video signal: broadcast/DVD
[ 1574.988818] saa7115 2-0021: Frequency: 60 Hz
[ 1574.988822] saa7115 2-0021: Detected format: NTSC
[ 1574.988826] saa7115 2-0021: Width, Height: 720, 480
[ 1574.988833] tda9887 2-0043: Data bytes: b=0xd0 c=0x6d e=0x40
[ 1574.988839] tuner 2-0060: Tuner mode: analog TV
[ 1574.988844] tuner 2-0060: Frequency: 307.25 MHz
[ 1574.988848] tuner 2-0060: Standard: 0x00002000
[ 1574.991173] upd64031a 2-0012: Status: SA00=0x02 SA01=0x01
[ 1574.996042] upd64083 2-005c: Status: SA00=40 SA01=ff SA02=00
SA03=00 SA04=0f SA05=00 SA06=00
[ 1574.996049] vp27smpx 2-005b: Audio Mode: 1
[ 1574.996054] ivtv0: Video Input: Tuner 1
[ 1574.996057] ivtv0: Audio Input: Tuner 1
[ 1574.996061] ivtv0: Tuner: TV
[ 1574.996065] ivtv0: Stream: MPEG-2 Program Stream
[ 1574.996070] ivtv0: VBI Format: No VBI
[ 1574.996075] ivtv0: Video: 720x480, 30 fps
[ 1574.996081] ivtv0: Video: MPEG-2, 4x3, Variable Bitrate,
6000000, Peak 8000000
[ 1574.996088] ivtv0: Video: GOP Size 15, 2 B-Frames, GOP Closure
[ 1574.996094] ivtv0: Audio: 48 kHz, MPEG-1/2 Layer II, 224 kbps,
Stereo, No Emphasis, No CRC
[ 1574.996102] ivtv0: Spatial Filter: Manual, Luma 1D Horizontal,
Chroma 1D Horizontal, 0
[ 1574.996108] ivtv0: Temporal Filter: Manual, 8
[ 1574.996112] ivtv0: Median Filter: Off, Luma [0, 255], Chroma [0, 255]
[ 1574.996117] ivtv0: Status flags: 0x00200000
[ 1574.996123] ivtv0: Stream encoder MPG: status 0x0000, 0% of 4096
KiB (128 buffers) in use # While streaming, only this value changes,
to 0x0118
[ 1574.996129] ivtv0: Stream encoder YUV: status 0x0000, 0% of 2048
KiB (64 buffers) in use # I don't know if my card even supports this
or how it works
[ 1574.996136] ivtv0: Stream encoder VBI: status 0x0000, 0% of 1040
KiB (61 buffers) in use # I don't know how to use vbi :(
[ 1574.996142] ivtv0: Stream encoder PCM: status 0x0000, 0% of 324
KiB (72 buffers) in use # Nothing happening here and that bothers
me...
[ 1574.996147] ivtv0: Read MPG/VBI: 5664704/0 bytes
[ 1574.996151] ivtv0: ================== END STATUS CARD #0
==================
On Thu, Feb 18, 2010 at 9:49 AM, Andy Walls <awalls@radix.net> wrote:
> On Thu, 2010-02-18 at 03:37 +0900, David Pimentel wrote:
>> Hello! I just upgraded from Ubuntu 9.04 to 9.10 and the audio capture
>> from my PVR is... missing.
>> It isn't muted; it's not a problem with pulseaudio or alsa; i don't
>> think it's vlc (the only player that seems to be compatible) and
>> there's definetly an audio signal coming in.
>> Oddly, I can't find the controls for volume or stereo mode anymore
>> ('stereo mode extension' control does appear) with v4l2-ctl -l
>> What bothers me most is that no audio stream is produced at all (ie
>> it's not on low volume--there is absolutely no audio coming out of the
>> card).
>>
>> Information:
>> Driver: ivtv 66561 (aka 1.4.1?)
>> Card: I/O Data G-MVP/RX
>
> Please provide the output of
>
> $ v4l2-ctl -d /dev/video0 --log-status
>
> when capturing.
>
> Also please try to capture and playback the raw PCM stream when
> capturing:
>
> $ cat /dev/video24 > foo.pcm
> ^C
> $ aplay -f dat < foo.pcm
> Playing raw data 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
>
>
> If foo.pcm has data that looks like this:
>
> $ xxd foo.pcm
> 0000000: 0000 0000 0000 0000 0000 ffff ffff ffff  ................
> 0000010: ffff ffff 0000 0000 0000 ffff 0000 0000 Â ................
> 0000020: ffff 0000 0000 0000 ffff ffff 0000 ffff  ................
> 0000030: ffff 0000 ffff 0000 0000 ffff 0000 ffff  ................
> 0000040: ffff ffff 0000 0000 ffff 0000 0000 ffff  ................
> 0000050: ffff ffff ffff 0000 ffff 0000 0000 0000 Â ................
> 0000060: ffff 0000 0000 0000 0000 0000 ffff 0000 Â ................
> 0000070: ffff 0000 0000 0000 0000 0000 0000 0000 Â ................
> 0000080: 0000 0000 ffff 0000 0000 0000 ffff 0000 Â ................
>
> then you are capturing "silence" (I think), and I'll try to look into
> what might be wrong.
>
> If you have "non-silence" data in foo.pcm, then it is a sound playback
> problem.
>
> Regards,
> Andy
>
>
> _______________________________________________
> ivtv-users mailing list
> ivtv-users@ivtvdriver.org
> http://ivtvdriver.org/mailman/listinfo/ivtv-users
>
>
_______________________________________________
ivtv-users mailing list
ivtv-users@ivtvdriver.org
http://ivtvdriver.org/mailman/listinfo/ivtv-users