On 06/11/2014 01:33 PM, Hans Verkuil wrote: > On 06/11/2014 09:43 PM, Scott Doty wrote: >> On 06/11/2014 01:24 AM, Hans Verkuil wrote: >>> On 06/03/14 03:23, Scott Doty wrote: >>>> Hello Mr. Hans and mailing list, >>>> >>>> In a nutshell, I'm having some hdpvr trouble: >>>> >>>> I'm using vlc to view the stream. Kernel 3.9.11 works pretty well, >>>> including giving me AC3 5.1 audio from the optical input to the >>>> Hauppauge device. The only problem I've run across is the device >>>> hanging when I change channels, but I've learned to live with that. >>>> (Though naturally it would be nice to fix. :) ) >>>> >>>> However, every kernel I've tried after 3.9.11 seems to have trouble with >>>> the audio. I get silence, and pulseaudio reports there is only stereo. >>>> I've taken a couple of of snapshots of pavucontrol so you can see what I >>>> mean: >>>> >>>> http://imgur.com/a/SIwc7 >>>> >>>> I even tried a git bisect to try to narrow down where things went awry, >>>> but ran out of time to pursue the question. But as far as I can tell, >>>> 3.9.11 is as far as I can go before my system won't use the device properly. >>>> >>>> I see the conversation in the archives from around the middle of May, >>>> where Hans was working with Ryley and Keith, but I'm not sure if I >>>> should apply that patch or not. I would love to make this work, >>>> including submitting a patch if someone could outline where the problem >>>> might be. >>>> >>>> Thank you in advance for any help you can provide, and please let me >>>> know if I can send any more information. :) >>> You can certainly try this patch: >>> >>> https://patchwork.linuxtv.org/patch/23890/ >>> >>> Nobody else reported audio problems other than the issue this patch tries >>> to resolve. However, that problem most likely has been with hdpvr since >>> the very beginning. >>> >>> There were some major changes made to the driver in 3.10, so that makes me >>> suspect that something might have broken. Odd though that I didn't see any >>> reports about that. >>> >>> Keith, Ryley, if you run v4l2-ctl -D, what is the version number that is >>> reported? >>> >>> If it is >= 3.10, then can you test with vlc as well? >> Just tried the patch with 3.14.5, and it didn't solve the problem. >> >> I'm not sure what's different about my system than other folks', unless >> they aren't using the optical input? >> >> Indeed, it acts just like the driver isn't properly honoring >> "default_audio_input=2". (For S/PDIF). Thinking that might be a clue, >> I hooked up stereo through the RCA jacks. With "default_audio_input=2", >> I did hear some crackling sounds -- but nothing intelligible, and I'm >> having a hard time reproducing that. With "default_audio_input=0", I >> get clear stereo sound from the RCA jacks. > Ah, you never mentioned that you used the default_audio_input module option. > I looked at that and that did indeed break in 3.10. You probably need to > do 'v4l2-ctl -c audio_encoding=4'. In 3.9 selecting default_audio_input=2 > would also switch to AC3 audio encoding, but in 3.10 that is reset a bit > later to AAC. > > But by selecting it manually it should work again. Let me know if I am > correct and if so, then I'll make a patch for this to fix this behavior. > Hello, Unfortunately, using the v4l2-ctl command doesn't seem to make any difference. I do know it's taking effect because when I set it to "3", the video pauses a bit then resumes, which I assume is your recent patch resetting the stream; and when I reset it to "4", I get the pause/resume again, but still no audio. Setting it to 4 before running vlc doesn't seem to help, either, alas. Maybe we need to set the pvr to do "passthrough" of its AC3 when running on newer kernels? -Scott -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
