humm, these errors are sparse but i have errors and warnings saying: Error: Error getting codec params using old IVTV ioctl Warning: Error getting codec params using old IVTV ioctl i guess this version of myth doesnt like this version of ivtv or visaversa, i didnt notice those errors, too much sql in the logs hiding the errors. although a little research says they are nothing to worry about, but i will upgrade to myth 0.21 to rule that out aside from that there is nothing about ioctl or ivtv for errors or warnings and i have all messages on to be logged.
Thanks Kevin Andy Walls wrote: > On Wed, 2008-05-07 at 21:05 -0300, Kevin Blair wrote: >> the fallowing is the differnce between when the audio is good and bad >> from $ v4l2-ctl --log-status >> >> --- record.good 2008-05-07 20:51:09.250606270 -0300 >> +++ record.bad 2008-05-07 20:53:28.747993406 -0300 >> @@ -32,17 +32,16 @@ >> ivtv0: Stream: MPEG-2 Program Stream >> ivtv0: VBI Format: No VBI >> ivtv0: Video: 480x480, 30 fps >> - ivtv0: Video: MPEG-2, 4x3, Variable Bitrate, 4000000, Peak 5000000 >> + ivtv0: Video: MPEG-2, 4x3, Variable Bitrate, 4500000, Peak 6000000 >> ivtv0: Video: GOP Size 15, 2 B-Frames, GOP Closure >> ivtv0: Audio: 48 kHz, Layer II, 384 kbps, Stereo, No Emphasis, No CRC >> ivtv0: Spatial Filter: Manual, Luma 1D Horizontal, Chroma 1D >> Horizontal, 0 >> ivtv0: Temporal Filter: Manual, 0 >> ivtv0: Median Filter: Off, Luma [0, 255], Chroma [0, 255] >> ivtv0: Status flags: 0x00200000 >> - ivtv0: Stream encoder MPG: status 0x0118, 2% of 4096 KiB (128 >> buffers) in use >> + ivtv0: Stream encoder MPG: status 0x0118, 1% of 4096 KiB (128 >> buffers) in use >> ivtv0: Stream encoder YUV: status 0x0000, 0% of 2048 KiB (64 >> buffers) in use >> ivtv0: Stream encoder VBI: status 0x0000, 0% of 1040 KiB (61 >> buffers) in use >> ivtv0: Stream encoder PCM: status 0x0000, 0% of 324 KiB (72 >> buffers) in use >> - ivtv0: Read MPG/VBI: 1639094208/0 bytes >> + ivtv0: Read MPG/VBI: 52113408/0 bytes >> ivtv0: ================== END STATUS CARD #0 ================== >> >> it seems the video vbi and peek go up and the read mpg/vbi goes down, >> which would match the issue cause the audio does sound simmiler to audio >> recorded at mp2/3 at 32/64kbps rather then a higher rate like 384kbps. > > If what you mean is that if increased video bitrate could force lower > quality audio, then this explains the poorer quality audio, then I > agree. However, I do not know if that's how the encoder actually > behaves. > > >> perhaps this may be an issue with mythtv rather then ivtv? mythtv is >> version 0.20.2_p14972 > > Does the mythbackend.log gripe about an ioctl() not working when the > tinny audio occurs? If it does, it may be worht hunting down in the > MythTV source, what ioctl()s it was trying to set. You could then look > at the source for the ivtv driver to see why those ioctl()s may fail. > >> this is from audio line in(it is a mce with rca jacks) hooked up to >> expressvu sat > > OK. So this shouldn't be due to audio standard auto-detection by the > cx25840. > > -Andy >> Kevin >> >> Andy Walls wrote: >>> On Wed, 2008-05-07 at 19:06 -0300, Kevin Blair wrote: >>>> Hi, >>>> >>>> im having the bad tinny audio issue on my mythtv system it has only >>>> started recently, and is intermittent so some recordings are fine some >>>> have bad audio, for live playback majortiy of the time audio is fine >>>> only after going in and out and in and out of live tv sevral times did i >>>> get the audio tinny, with no pattern its hard to predict or reproduce on >>>> command, the source is svid and composite. cat /dev/video0 seems to test >>>> out fine, how ever since live tv playback works most of the time i cant >>>> say for sure that its working. >>>> >>>> i am useing gentoo linux and ivtv v1.0.3 i was useing 2.6.24 and i >>>> upgraded to 2.6.25 kernel but the problem remains, due to hardware >>>> compatibility i cant downgrade kernel. i tried adding tuner=50 to module >>>> options with no success. >>>> executing v4l2-ctl --set-audio-input 0 ; v4l2-ctl --set-audio-input 1 >>>> when i get mythtv audio playback bad the audio goes to normal, which >>>> doesnt help fix the problem for recordings. >>> What is the difference, if any, between the output of >>> >>> $ v4l2-ctl --log-status >>> >>> when the audio is good and when the audio is bad on the input same >>> source. >>> >>> Also can you clarify: does this happens with tuner audio only, audio >>> line in only, or both? >>> >>> -Andy >>> >>>> my tuner is as fallows from lspci -v >>>> 05:06.0 Multimedia video controller: Internext Compression Inc iTVC16 >>>> (CX23416) MPEG-2 Encoder (rev 01) >>>> Subsystem: Hauppauge computer works Inc. WinTV PVR 150 >>>> Flags: bus master, medium devsel, latency 64, IRQ 16 >>>> Memory at e4000000 (32-bit, prefetchable) [size=64M] >>>> Capabilities: [44] Power Management version 2 >>>> Kernel driver in use: ivtv >>>> Kernel modules: ivtv >>>> >>>> dmesg output from ivtv being loaded is as fallows: >>>> >>>> ivtv: Start initialization, version 1.2.0 >>>> ivtv0: Initializing card #0 >>>> ivtv0: Autodetected Hauppauge card (cx23416 based) >>>> ACPI: PCI Interrupt Link [APC1] enabled at IRQ 16 >>>> ACPI: PCI Interrupt 0000:05:06.0[A] -> Link [APC1] -> GSI 16 (level, >>>> low) -> IRQ 16 >>>> ivtv0: Unreasonably low latency timer, setting to 64 (was 32) >>>> tveeprom 2-0050: Hauppauge model 26552, rev F068, serial# 10426282 >>>> tveeprom 2-0050: tuner model is LG TAPE H001F MK3 (idx 68, type 47) >>>> tveeprom 2-0050: TV standards NTSC(M) (eeprom 0x08) >>>> tveeprom 2-0050: audio processor is CX25843 (idx 37) >>>> tveeprom 2-0050: decoder processor is CX25843 (idx 30) >>>> tveeprom 2-0050: has radio, has no IR receiver, has no IR transmitter >>>> ivtv0: Autodetected Hauppauge WinTV PVR-150 >>>> cx25840 2-0044: cx25843-24 found @ 0x88 (ivtv i2c driver #0) >>>> tuner 2-0043: chip found @ 0x86 (ivtv i2c driver #0) >>>> tda9887 2-0043: tda988[5/6/7] found >>>> tuner 2-0061: chip found @ 0xc2 (ivtv i2c driver #0) >>>> wm8775 2-001b: chip found @ 0x36 (ivtv i2c driver #0) >>>> tuner-simple 2-0061: type set to 50 (TCL 2002N) >>>> ivtv0: Registered device video0 for encoder MPG (4096 kB) >>>> ivtv0: Registered device video32 for encoder YUV (2048 kB) >>>> ivtv0: Registered device vbi0 for encoder VBI (1024 kB) >>>> ivtv0: Registered device video24 for encoder PCM (320 kB) >>>> ivtv0: Registered device radio0 for encoder radio >>>> ivtv0: Initialized card #0: Hauppauge WinTV PVR-150 >>>> ivtv: End initialization >>>> >>>> and firmware >>>> ivtv0: Loaded v4l-cx2341x-enc.fw firmware (376836 bytes) >>>> ivtv0: Encoder revision: 0x02060039 >>>> cx25840 2-0044: loaded v4l-cx25840.fw firmware (16382 bytes) >>>> >>>> >>>> any suggestions would be much appreciated. >>>> >>>> Kevin >>> >>> >>> _______________________________________________ >>> 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 >> > > > _______________________________________________ > 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
