On Saturday 04 August 2007 13:56:28 Herbert Meier wrote:
> On Sat, 4 Aug 2007, Hans Verkuil wrote:
> > On Saturday 04 August 2007 11:44:03 Herbert Meier wrote:
> > > I am using
> > >
> > > ivtvctl version 0.10.5 (tagged release)
> > > debian etch, kernel 2.6.18-4-686.
> > >
> > > In my setup there is a PVR150 and a PVR350.
> > >
> > > When recording from PVR350's tuner, audio is
> > > corrupted.
> > >
> > > In the recorded MPEG file, about every 0.5 seconds
> > > there is a switch between mono and stereo sound.
> > >
> > > In the attached picture you can see the difference
> > > between left and right channel. At times where only
> > > mono is provided, the difference signal is zero. There
> > > also is a time scale below for measuring how long those
> > > interruptions are.
> > >
> > > IMHO there is something wrong with the tuner control
> > > during recording.
> > >
> > >
> > > Some additional infos on this experiment:
> > >
> > > - Recording from SCART or CINCH doesn't produce the above
> > > described problem.
> > >
> > > - I did not try it with PVR150's tuner.
> > >
> > > If you have further questions, please contact me.
> > >
> > >
> > > Regards,
> > > Herbert.
> >
> > Please provide the INIT IVTV messages from the kernel log.
>
> ivtv: ==================== START INIT IVTV ====================
> ivtv: version 0.10.5 (tagged release) loading
> ivtv: Linux version: 2.6.18-4-686 SMP mod_unload 686 REGPARM gcc-4.1
> ivtv: In case of problems please include the debug info between
> ivtv: the START INIT IVTV and END INIT IVTV lines, along with
> ivtv: any module options, when mailing the ivtv-users mailinglist.
> ivtv0: Autodetected Hauppauge card (cx23415 based)
> PCI: Enabling device 0000:02:02.0 (0000 -> 0002)
> ACPI: PCI Interrupt 0000:02:02.0[A] -> GSI 22 (level, low) -> IRQ 201
> ivtv0: loaded v4l-cx2341x-enc.fw firmware (376836 bytes)
> ivtv0: loaded v4l-cx2341x-dec.fw firmware (262144 bytes)
> ivtv0: Encoder revision: 0x02060039
> ivtv0: Decoder revision: 0x02020023
> tuner 1-0043: chip found @ 0x86 (ivtv i2c driver #0)
> tda9887 1-0043: tda988[5/6/7] found @ 0x43 (tuner)
> tuner 1-0061: chip found @ 0xc2 (ivtv i2c driver #0)
> saa7115 1-0021: saa7115 found @ 0x42 (ivtv i2c driver #0)
> saa7127 1-0044: saa7129 found @ 0x88 (ivtv i2c driver #0)
> msp3400 1-0040: MSP4418G-B3 found @ 0x80 (ivtv i2c driver #0)
> msp3400 1-0040: MSP4418G-B3 supports nicam and radio, mode is
> autodetect and autoselect
> tveeprom 1-0050: Hauppauge model 48139, rev K257, serial# 7671778
> tveeprom 1-0050: tuner model is Philips FM1216 ME MK3 (idx 57, type
> 38) tveeprom 1-0050: TV standards PAL(B/G) PAL(I) SECAM(L/L')
> PAL(D/D1/K) (eeprom 0x74)
> tveeprom 1-0050: audio processor is MSP4418 (idx 25)
> tveeprom 1-0050: decoder processor is SAA7115 (idx 19)
> tveeprom 1-0050: has radio, has IR remote
> ivtv0: Autodetected Hauppauge WinTV PVR-350
> ivtv0: Registered device video0 for encoder MPEG (4 MB)
> ivtv0: Registered device video32 for encoder YUV (2 MB)
> ivtv0: Registered device vbi0 for encoder VBI (1 MB)
> ivtv0: Registered device video24 for encoder PCM audio (1 MB)
> ivtv0: Registered device radio0 for encoder radio
> ivtv0: Registered device video16 for decoder MPEG (1 MB)
> ivtv0: Registered device vbi8 for decoder VBI (1 MB)
> ivtv0: Registered device vbi16 for decoder VOUT
> ivtv0: Registered device video48 for decoder YUV (1 MB)
> ivtv0: loaded v4l-cx2341x-init.mpg firmware (155648 bytes)
> tuner 1-0061: type set to 38 (Philips PAL/SECAM multi (FM1216ME MK3))
> ivtv0: Initialized Hauppauge WinTV PVR-350, card #0
> ivtv: ====================== NEXT CARD ======================
> ivtv1: Autodetected Hauppauge card (cx23416 based)
> PCI: Enabling device 0000:02:04.0 (0000 -> 0002)
> ACPI: PCI Interrupt 0000:02:04.0[A] -> GSI 18 (level, low) -> IRQ 209
> ivtv1: loaded v4l-cx2341x-enc.fw firmware (376836 bytes)
> ivtv1: Encoder revision: 0x02060039
> tuner 2-0061: chip found @ 0xc2 (ivtv i2c driver #1)
> cx25840 2-0044: cx25842-23 found @ 0x88 (ivtv i2c driver #1)
> cx25840 2-0044: loaded v4l-cx25840.fw firmware (16382 bytes)
> wm8775 2-001b: chip found @ 0x36 (ivtv i2c driver #1)
> tveeprom 2-0050: Hauppauge model 26134, rev F0B3, serial# 9474246
> tveeprom 2-0050: tuner model is TCL M2523_3DB_E (idx 113, type 55)
> tveeprom 2-0050: TV standards PAL(B/G) PAL(D/D1/K) (eeprom 0x44)
> tveeprom 2-0050: audio processor is CX25842 (idx 36)
> tveeprom 2-0050: decoder processor is CX25842 (idx 29)
> tveeprom 2-0050: has no radio, has IR remote
> ivtv1: Autodetected Hauppauge WinTV PVR-150
> ivtv1: reopen i2c bus for IR-blaster support
> tuner 2-0061: chip found @ 0xc2 (ivtv i2c driver #1)
> cx25840 2-0044: cx25842-23 found @ 0x88 (ivtv i2c driver #1)
> cx25840 2-0044: loaded v4l-cx25840.fw firmware (16382 bytes)
> wm8775 2-001b: chip found @ 0x36 (ivtv i2c driver #1)
> ivtv1: Registered device video1 for encoder MPEG (4 MB)
> ivtv1: Registered device video33 for encoder YUV (2 MB)
> ivtv1: Registered device vbi1 for encoder VBI (1 MB)
> ivtv1: Registered device video25 for encoder PCM audio (1 MB)
> tuner 2-0061: type set to 55 (TCL 2002MB)
> ivtv1: Initialized Hauppauge WinTV PVR-150, card #1
> ivtv: ==================== END INIT IVTV ====================
>
> > Also do you see any other messages when recording?
>
> No.
>
> > Is this with all stereo channels or only a few?
>
> All tested stereo channels produce that problem.
>
> > Please also test with the PVR150.
>
> I will do my best.
Please do, that will determine whether it is a general problem or
whether it is specific to the msp3400 audio chip.
> Any ideas so far?
If the PVR150 works OK then that indicates a problem with the msp3400.
In that case you should upgrade your kernel to 2.6.20 or up (I remember
that there were some msp3400 bugs that were fixed. I'm not sure whether
those bugs are related to this problem, but upgrade anyway).
If it still happens with that newer kernel, then you should enable
msp3400 debugging:
echo 1 >/sys/modules/msp3400/parameters/debug
and start a capture of a stereo channel and report what the msp3400 is
logging.
Regards,
Hans
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