>> >> Any feedback? >> >> Robert Kulagowski wrote: >> > I'm getting tinny audio on 0.4.2 using a PVR-150 (NTSC), >> composite inputs. >> > >> > As a quick guess, I'd say this happens 75% of the time. >> Initial audio >> > will be fine, but within 5-10 seconds, it will go "tinny", as if a >> > buzz was being added to all audio. It will stay that way >> through the >> > rest of the program. >> > >> > I am able to reproduce this using a straight cat >> /dev/video4 > foo.mpg >> > and with MythTV. >> > >> > I know that in the past, tinny audio was related to >> msp3400, but I'm >> > not sure how the new integration effort with v4l / kernel may be >> > affecting things. >> > >> > Anything I can do to assist in troubleshooting? >> > > > I think someone mentioned creating a cron job to call ivtvctl -q2 like > every > 15 seconds or so. I have the same problem and this worked for me. I'd > say > 75% is a good estimate of how often it happens to me but mostly, its when > Myth starts to record something as opposed to LiveTV. In LiveTV, it only > happens about 50%. Also, it happens almost instantly on changing > channels, > not the 5-10 seconds you seem to be experiencing. > > Having this cron job running, I can wait 15 seconds for the audio to > "magically" clear itself up. > > I have not tried reverting the driver. I'm running 0.4.2 release on > 2-6.14-gentoo-r2. Recommended firmware versions from the wiki. This also > only seems to affect my PVR150. I have a PVR350 in the same box and it > does > not suffer from this. I tried swapping the PVR150 for another one but the > results were the same. > [snip]
Got the same problem here as a result of a Gentoo update to 0.4.2. Like many, I'm using it with Mythtv so there may be some issue with ioctl differences fro m0.4.0 to 0.4.2. I upped to a 2.6.15 kernal at the same time. This is on a PAL pvr150. Sounds to me like a pre-amp being overdriven - definite clipping 'fuzz box' (shades of the 60's) sort of sound. I've made another observation - if I change channel to a tuner input and then back to the s-video (so I'm using the external audio input again) then the audio is fixed. If I just enter LiveTV on Mythtv (so it goes straight to the last channel selected) then the audio is duff again!! ivtv: ==================== START INIT IVTV ==================== ivtv: version 0.4.2 (tagged release) loading ivtv: Linux version: 2.6.15-gentoo-r1 preempt VIAC3-2 gcc-3.4 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 WinTV PVR 150 card (cx23416 based) ACPI: PCI Interrupt 0000:00:14.0[A] -> Link [LNKB] -> GSI 10 (level, low) -> IRQ 10 ivtv0: Unreasonably low latency timer, setting to 64 (was 32) ivtv0: i2c attach to card #0 ok [client=tveeprom, addr=50] tveeprom 1-0050: The eeprom says no radio is present, but the tuner type tveeprom 1-0050: indicates otherwise. I will assume that radio is present. tveeprom 1-0050: Hauppauge model 26559, rev C260, serial# 8212656 tveeprom 1-0050: tuner model is LG S001D MK3 (idx 60, type 38) tveeprom 1-0050: TV standards PAL(B/G) PAL(I) SECAM(L/L') PAL(D/K) (eeprom 0x74) tveeprom 1-0050: audio processor is CX25843 (idx 37) tveeprom 1-0050: decoder processor is CX25843 (idx 30) tveeprom 1-0050: has radio, has no IR remote tuner 1-0061: chip found @ 0xc2 (ivtv i2c driver #0) ivtv0: i2c attach to card #0 ok [client=(tuner unset), addr=61] cx25840 1-0044: cx25843-23 found @ 0x88 (ivtv i2c driver #0) cx25840 1-0044: loaded v4l-cx25840.fw firmware (14264 bytes) ivtv0: i2c attach to card #0 ok [client=cx25840, addr=44] wm8775 1-001b: chip found @ 0x36 (ivtv i2c driver #0) ivtv0: i2c attach to card #0 ok [client=wm8775, addr=1b] tda9887 1-0043: chip found @ 0x86 (ivtv i2c driver #0) ivtv0: i2c attach to card #0 ok [client=tda9887, addr=43] ivtv0: loaded v4l-cx2341x-enc.fw firmware (262144 bytes) ivtv0: Encoder revision: 0x02050032 ivtv0: Allocate DMA encoder MPEG stream: 128 x 32768 buffers (4096KB total) ivtv0: Allocate DMA encoder YUV stream: 161 x 12960 buffers (2048KB total) ivtv0: Allocate DMA encoder VBI stream: 80 x 26208 buffers (2048KB total) ivtv0: Allocate DMA encoder PCM audio stream: 455 x 4608 buffers (2048KB total) ivtv0: Create encoder radio stream tuner 1-0061: type set to 38 (Philips PAL/SECAM multi (FM1216ME MK3)) ivtv0: Initialized WinTV PVR 150, card #0 ivtv: ==================== END INIT IVTV ==================== -- Robin Gilks _______________________________________________ ivtv-devel mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-devel
