Mailing List Archive: Getting PCM Audio from a Hauppauge PVR-350

Getting PCM Audio from a Hauppauge PVR-350

Oct 14, 2011, 11:14 AM

Post #1 of 3 (1634 views)

Hi everyone,
I have a PVR-350 installed on a Ubuntu 10.10 under a 1.4.1 ivtv-utils
Everything is working quite fine but i'm having problems getting PCM audio
from the device (in my case /dev/video25)
I've been able to get mpeg and raw video at the same time (devices video1
and video33), but for my application would be useful to get the audio alone,
better if raw, to avoid unnecessary decoding and demux.

I'm using a dvd player as source. I've posted the v4l2 log-status at the end
of this message in case it could be useful

Appreciate any help.
Hector

[372588.932817] ivtv0: ================= START STATUS CARD #0
=================
[372588.932821] ivtv0: Version: 1.4.1 Card: Hauppauge WinTV PVR-350
[372588.986361] tveeprom 0-0050: Hauppauge model 48134, rev I121, serial#
6155307
[372588.986365] tveeprom 0-0050: tuner model is Philips FM1216 (idx 21,
type 5)
[372588.986370] tveeprom 0-0050: TV standards PAL(B/G) (eeprom 0x04)
[372588.986374] tveeprom 0-0050: audio processor is MSP4418 (idx 25)
[372588.986377] tveeprom 0-0050: decoder processor is SAA7115 (idx 19)
[372588.986380] tveeprom 0-0050: has radio, has IR receiver, has no IR
transmitter
[372588.986384] saa7115 0-0021: Audio frequency: 48000 Hz
[372588.988167] saa7115 0-0021: Input: S-Video 0
[372588.988169] saa7115 0-0021: Video signal: bad
[372588.988171] saa7115 0-0021: Frequency: 50 Hz
[372588.988173] saa7115 0-0021: Detected format: BW/No color
[372588.988174] saa7115 0-0021: Width, Height: 720, 576
[372588.988177] saa7127 0-0044: Standard: 50 Hz
[372588.988179] saa7127 0-0044: Input: normal
[372588.988180] saa7127 0-0044: Output: S-Video + Composite
[372588.988182] saa7127 0-0044: WSS: disabled
[372588.988184] saa7127 0-0044: VPS: disabled
[372588.988186] saa7127 0-0044: CC: disabled
[372588.989673] msp3400 0-0040: msp3400 rev1 = 0x0117 rev2 = 0x1242
[372588.989676] msp3400 0-0040: Audio: volume 58880
[372588.989678] msp3400 0-0040: Mode: External input
[372588.989680] msp3400 0-0040: Audmode: 0x0001
[372588.989682] msp3400 0-0040: Routing: 0x00222220 (input) 0x00000044
(output)
[372588.989685] msp3400 0-0040: ACB: 0x0c00
[372588.989688] tuner 0-0061: Tuner mode: analog TV
[372588.989690] tuner 0-0061: Frequency: 400.00 MHz
[372588.989692] tuner 0-0061: Standard: 0x00000007
[372588.989695] ivtv0: Video Input: S-Video 1
[372588.989696] ivtv0: Audio Input: Line In 1
[372588.989699] ivtv0: Video Output: S-Video + Composite
[372588.989701] ivtv0: Audio Output: A/V Audio Out (Stereo/Bilingual:
Stereo/Left)
[372588.989703] ivtv0: Output Mode: None
[372588.989838] ivtv0: Overlay: Off, Alpha: Global, Pixel Format:
ARGB 8:8:8:8
[372588.989840] ivtv0: Tuner: TV
[372588.989843] ivtv0: Stream: MPEG-2 Program Stream
[372588.989846] ivtv0: VBI Format: No VBI
[372588.989848] ivtv0: Video: 720x576, 25 fps
[372588.989850] ivtv0: Video: MPEG-2, 4x3, Variable Bitrate, 6000000,
Peak 8000000
[372588.989854] ivtv0: Video: GOP Size 12, 2 B-Frames, GOP Closure
[372588.989857] ivtv0: Audio: 48 kHz, MPEG-1/2 Layer II, 224 kbps,
Stereo, No Emphasis, No CRC
[372588.989861] ivtv0: Spatial Filter: Manual, Luma 1D Horizontal,
Chroma 1D Horizontal, 0
[372588.989863] ivtv0: Temporal Filter: Manual, 8
[372588.989865] ivtv0: Median Filter: Off, Luma [0, 255], Chroma [0,
255]
[372588.989868] ivtv0: Status flags: 0x00200080
[372588.989871] ivtv0: Stream encoder MPG: status 0x0000, 0% of 4096 KiB
(128 buffers) in use
[372588.989874] ivtv0: Stream encoder YUV: status 0x0000, 0% of 2048 KiB
(64 buffers) in use
[372588.989877] ivtv0: Stream encoder VBI: status 0x0000, 0% of 1049 KiB
(41 buffers) in use
[372588.989880] ivtv0: Stream encoder PCM: status 0x0000, 0% of 324 KiB
(72 buffers) in use
[372588.989883] ivtv0: Stream decoder MPG: status 0x0000, 0% of 1024 KiB
(16 buffers) in use
[372588.989886] ivtv0: Stream decoder VBI: status 0x0000, 0% of 65 KiB
(29 buffers) in use
[372588.989888] ivtv0: Stream decoder YUV: status 0x0000, 0% of 1024 KiB
(16 buffers) in use
[372588.989891] ivtv0: Read MPG/VBI: 7168000/0 bytes
[372588.989893] ivtv0: ================== END STATUS CARD #0
==================

Re: Getting PCM Audio from a Hauppauge PVR-350 [ In reply to ]

awalls at md

Oct 15, 2011, 9:34 AM

Post #2 of 3 (1588 views)

Permalink

On Fri, 2011-10-14 at 20:14 +0200, Hector Canto wrote:
> Hi everyone,
> I have a PVR-350 installed on a Ubuntu 10.10 under a 1.4.1 ivtv-utils
> Everything is working quite fine but i'm having problems getting PCM
> audio from the device (in my case /dev/video25)

Does

$ cat /dev/video25 > foo.pcm

produce a 0 length file or a file with data in it?

If the file is not 0 length, please provide a little bit of the output
of

$ xxd -g 2 foo.pcm

to see if your are getting silence or sound data.

$ aplay -f dat foo.pcm

should play the sound.

Regards,
Andy

> I've been able to get mpeg and raw video at the same time (devices
> video1 and video33), but for my application would be useful to get the
> audio alone, better if raw, to avoid unnecessary decoding and demux.
>
> I'm using a dvd player as source. I've posted the v4l2 log-status at
> the end of this message in case it could be useful
>
> Appreciate any help.
> Hector
>
>
> [372588.932817] ivtv0: ================= START STATUS CARD #0
> =================
> [372588.932821] ivtv0: Version: 1.4.1 Card: Hauppauge WinTV PVR-350
> [372588.986361] tveeprom 0-0050: Hauppauge model 48134, rev I121,
> serial# 6155307
> [372588.986365] tveeprom 0-0050: tuner model is Philips FM1216 (idx
> 21, type 5)
> [372588.986370] tveeprom 0-0050: TV standards PAL(B/G) (eeprom
> 0x04)
> [372588.986374] tveeprom 0-0050: audio processor is MSP4418 (idx
> 25)
> [372588.986377] tveeprom 0-0050: decoder processor is SAA7115 (idx
> 19)
> [372588.986380] tveeprom 0-0050: has radio, has IR receiver, has no
> IR transmitter
> [372588.986384] saa7115 0-0021: Audio frequency: 48000 Hz
> [372588.988167] saa7115 0-0021: Input: S-Video 0
> [372588.988169] saa7115 0-0021: Video signal: bad
> [372588.988171] saa7115 0-0021: Frequency: 50 Hz
> [372588.988173] saa7115 0-0021: Detected format: BW/No color
> [372588.988174] saa7115 0-0021: Width, Height: 720, 576
> [372588.988177] saa7127 0-0044: Standard: 50 Hz
> [372588.988179] saa7127 0-0044: Input: normal
> [372588.988180] saa7127 0-0044: Output: S-Video + Composite
> [372588.988182] saa7127 0-0044: WSS: disabled
> [372588.988184] saa7127 0-0044: VPS: disabled
> [372588.988186] saa7127 0-0044: CC: disabled
> [372588.989673] msp3400 0-0040: msp3400 rev1 = 0x0117 rev2 = 0x1242
> [372588.989676] msp3400 0-0040: Audio: volume 58880
> [372588.989678] msp3400 0-0040: Mode: External input
> [372588.989680] msp3400 0-0040: Audmode: 0x0001
> [372588.989682] msp3400 0-0040: Routing: 0x00222220 (input)
> 0x00000044 (output)
> [372588.989685] msp3400 0-0040: ACB: 0x0c00
> [372588.989688] tuner 0-0061: Tuner mode: analog TV
> [372588.989690] tuner 0-0061: Frequency: 400.00 MHz
> [372588.989692] tuner 0-0061: Standard: 0x00000007
> [372588.989695] ivtv0: Video Input: S-Video 1
> [372588.989696] ivtv0: Audio Input: Line In 1
> [372588.989699] ivtv0: Video Output: S-Video + Composite
> [372588.989701] ivtv0: Audio Output: A/V Audio Out
> (Stereo/Bilingual: Stereo/Left)
> [372588.989703] ivtv0: Output Mode: None
> [372588.989838] ivtv0: Overlay: Off, Alpha: Global, Pixel
> Format: ARGB 8:8:8:8
> [372588.989840] ivtv0: Tuner: TV
> [372588.989843] ivtv0: Stream: MPEG-2 Program Stream
> [372588.989846] ivtv0: VBI Format: No VBI
> [372588.989848] ivtv0: Video: 720x576, 25 fps
> [372588.989850] ivtv0: Video: MPEG-2, 4x3, Variable Bitrate,
> 6000000, Peak 8000000
> [372588.989854] ivtv0: Video: GOP Size 12, 2 B-Frames, GOP Closure
> [372588.989857] ivtv0: Audio: 48 kHz, MPEG-1/2 Layer II, 224 kbps,
> Stereo, No Emphasis, No CRC
> [372588.989861] ivtv0: Spatial Filter: Manual, Luma 1D Horizontal,
> Chroma 1D Horizontal, 0
> [372588.989863] ivtv0: Temporal Filter: Manual, 8
> [372588.989865] ivtv0: Median Filter: Off, Luma [0, 255], Chroma
> [0, 255]
> [372588.989868] ivtv0: Status flags: 0x00200080
> [372588.989871] ivtv0: Stream encoder MPG: status 0x0000, 0% of
> 4096 KiB (128 buffers) in use
> [372588.989874] ivtv0: Stream encoder YUV: status 0x0000, 0% of
> 2048 KiB (64 buffers) in use
> [372588.989877] ivtv0: Stream encoder VBI: status 0x0000, 0% of
> 1049 KiB (41 buffers) in use
> [372588.989880] ivtv0: Stream encoder PCM: status 0x0000, 0% of 324
> KiB (72 buffers) in use
> [372588.989883] ivtv0: Stream decoder MPG: status 0x0000, 0% of
> 1024 KiB (16 buffers) in use
> [372588.989886] ivtv0: Stream decoder VBI: status 0x0000, 0% of 65
> KiB (29 buffers) in use
> [372588.989888] ivtv0: Stream decoder YUV: status 0x0000, 0% of
> 1024 KiB (16 buffers) in use
> [372588.989891] ivtv0: Read MPG/VBI: 7168000/0 bytes
> [372588.989893] ivtv0: ================== END STATUS CARD #0
> ==================
>
> _______________________________________________
> ivtv-users mailing list
> ivtv-users@ivtvdriver.org
> http://ivtvdriver.org/mailman/listinfo/ivtv-users

_______________________________________________
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Getting PCM Audio from a Hauppauge PVR-350 [ In reply to ]

hectorcanto at teltek

Oct 17, 2011, 4:13 AM

Post #3 of 3 (1589 views)

Permalink

Thanks Andy for your early answer.

It does capture data with

$ cat /dev/video25 > foo.pcm

and I'm abble to play it with

$ aplay -f dat foo.pcm

Everything it's fine, the problem seems to be the *decodification* on my
app.
I'm using GStreamer and if I play the foo.pcm I get noise, I can't figure
how to get it right.
I'll dig into this, now that I really know I have sound.

Thanks again
Hector