<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Apr 2, 2012, at 3:30 PM, Jean-Yves Avenard wrote:</div><blockquote type="cite">On Monday, 2 April 2012, Steven Ihde wrote:<br><blockquote class="gmail_quote" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex; position: static; z-index: auto; "><div style="word-wrap:break-word"><div><br></div>Audio is set to Stereo, yes, although it is the only choice. Dolby Digital and DTS are unchecked, as the HDMI cable is plugged directly into my TV, not a receiver/processor.<div><br></div></div></blockquote><div>Please, do not top post..</div><div><br></div><div>That would make sense then... Audio has to be decoded and down mixed from 5.1 to stereo. This is done as a floating point operation.</div>
<div>So your audio card is opened as stereo for an originally 6 channels audio (hence the 2(6) message in the log)</div><div><br></div><div>Now why it doesn't play is hard to understand, especially if you're saying that plain stereo works...</div>
<div><br></div><div>Are you able to compile mythtv yourself? I'd like to try something with you... </div></blockquote><div><br></div>Yes, I can build from source. I'm happy to try any suggestions you have. I was expecting to see a message about "downmixing" from 6 to 2 channels but I don't see one.</div><div><br></div><div>Sorry I missed your earlier message asking for more logs; pasted a longer log segment below.</div><div><br></div><div><div>2012-04-01 23:30:20.796 AFD: EIA-708 caption service #1 is in the English language.</div><div>2012-04-01 23:30:20.797 AFD: Using vdpau for video decoding</div><div>2012-04-01 23:30:20.797 AFD: Looking for decoder for MPEG2VIDEO</div><div>2012-04-01 23:30:20.797 AFD: Opened codec 0x3b65670, id(MPEG2VIDEO) type(Video)</div><div>2012-04-01 23:30:20.797 AFD: Stream #1, has id 0x33 codec id AC3, type Audio, bitrate 384000 at 0x3948bc0</div><div>2012-04-01 23:30:20.797 AFD: codec AC3 has 6 channels</div><div>2012-04-01 23:30:20.797 AFD: Looking for decoder for AC3</div><div>2012-04-01 23:30:20.798 AFD: Opened codec 0x3b65ad0, id(AC3) type(Audio)</div><div>2012-04-01 23:30:20.798 AFD: Stream #2, has id 0x34 codec id AC3, type Audio, bitrate 64000 at 0x3ba4670</div><div>2012-04-01 23:30:20.798 AFD: codec AC3 has 1 channels</div><div>2012-04-01 23:30:20.798 AFD: Looking for decoder for AC3</div><div>2012-04-01 23:30:20.798 AFD: Opened codec 0x3aa5ee0, id(AC3) type(Audio)</div><div>2012-04-01 23:30:20.798 AFD: Stream #3, has id 0x35 codec id AC3, type Audio, bitrate 64000 at 0x39700b0</div><div>2012-04-01 23:30:20.799 AFD: codec AC3 has 1 channels</div><div>2012-04-01 23:30:20.799 AFD: Looking for decoder for AC3</div><div>2012-04-01 23:30:20.799 AFD: Opened codec 0x3aa6340, id(AC3) type(Audio)</div><div>2012-04-01 23:30:20.978 AO: Opening audio device 'iec958:CARD=CMI8768,DEV=0' ch 2(6) sr 48000 sf signed 32 bit reenc 0</div><div>2012-04-01 23:30:20.981 ALSA, Error: Unable to sufficiently increase ALSA hardware buffer size - underruns are likely</div><div>2012-04-01 23:30:20.986 AudioPlayer: Enabling Audio</div><div><div>2012-04-01 23:30:20.987 Dec: Selected track #1 in the Unknown language(0)</div><div>2012-04-01 23:30:20.987 Dec: Selected track #1 in the English language(6647399)</div></div><div><br></div><div>The only subsequent mention of audio is the following:</div><div><br></div><div><div>2012-04-01 23:30:21.271 Player(0): Forcing decode extra audio option on (Video method requires it).</div></div><div><br></div><div>Note the "Unable to sufficiently increase..." message occurs after I had already followed the instructions to manually increase the prealloc. Before setting it to 128, I got a more extensive message like this:</div><div><br></div><div><div>2012-04-01 21:59:33.795 ALSA, Error: Setting hardware audio buffer size to 128</div><div>2012-04-01 21:59:33.796 ALSA, Error: Error opening /proc/asound/card1/pcm2p/sub0/prealloc: Permission denied.</div><div>2012-04-01 21:59:33.796 ALSA, Error: Try to manually increase audio buffer with: echo 128 | sudo tee /proc/asound/card1/pcm2p/sub0/prealloc</div><div>2012-04-01 21:59:33.796 ALSA, Error: Unable to sufficiently increase ALSA hardware buffer size - underruns are likely</div></div><div><br></div><div>Setting the size to 128 seems to make the first three messages go away, but the one about "Unable to sufficiently increase ..." remains.</div><div><br></div><div>In neither case do I ever see the "WriteAudio: buffer underrun" messages (i.e., neither when sound works nor when it is silent), so I do not believe buffer underruns are the problem, but I am open to suggestion there as well.</div><div><br></div><div>Thanks,</div><div><br></div><div>Steve</div><div><br></div></div></body></html>