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| aggraef | rgareus: thanks *a lot* guys, i owe you some <nondisclosed perks> at LAC! | 06:10 |
|---|---|---|
| aggraef | rgareus: yes, jörn stayed at the guest house on campus | 06:10 |
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| nettings | aggraef, rgareus: ok, both cams survive after 8 hours of constant streaming. sinks are still up, too. | 07:47 |
| nettings | but a/v are about 10s out of sync... | 07:50 |
| nettings | rgareus, funny: the dv dump to disk is in sync. the stream isn't. so it happens in the encoding chain... | 07:59 |
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| nettings | looks like with both cams running at 16bit audio rather than 12, the sync problem is at least less obvious.... still seems to be good after 5 minutes. | 09:14 |
| rgareus | 'morning | 09:39 |
| rgareus | great news in general | 09:39 |
| rgareus | nettings: what is the complete encoder command? | 09:40 |
| rgareus | maybe the encoder drops some idendical video-frames (the audio will be early) | 09:41 |
| nettings | rgareus, morning. | 09:41 |
| nettings | dvsink-command -h localhost -p 5675 -- \ | 09:42 |
| nettings | ffmpeg -f dv -i - -s 360x288 -b:v 180k -b:a 48k -f webm -avoid_negative_ts 1 - \ | 09:42 |
| nettings | | icefwd -f webm lacstreamer.stackingdwarves.net | 09:42 |
| rgareus | or the video encoder is not fast enough... | 09:42 |
| nettings | could be. i've seen one cpu maxed occasionally. but then it should just drop video frames, no? | 09:43 |
| rgareus | that could explain the A/V sync | 09:43 |
| rgareus | nettings: did you disable the CPU freq scaling? | 09:43 |
| nettings | no. didn't work on this box. | 09:45 |
| nettings | cpufreqd runs, but cpufreqd-set complains about no socket found... | 09:47 |
| rgareus | how about ffmpeg2theora ? did you abandon that ? | 09:49 |
| rgareus | the encoder commandline looks good | 09:49 |
| nettings | for now, yes. | 09:50 |
| rgareus | so it's either a bug in ffmpeg or CPU spike | 09:50 |
| rgareus | (or both) | 09:50 |
| nettings | aw shit. firewire stack gets so confused after a camera went to standby, it needs rebooting. no busreset helps, and firewire-ohci can't be unloaded, either. | 09:50 |
| rgareus | we didn't have that before. | 09:51 |
| nettings | rgareus, but isn't there a "hard frame drop" option for the encoder somewhere? | 09:51 |
| nettings | rgareus, the manpages i have don't seem to correspond to the ffmpeg used... :( | 09:51 |
| rgareus | nettings: use the built-in documentation | 09:52 |
| rgareus | ffmpeg --help full # or something or google it | 09:52 |
| nettings | ah yes, thanks. | 09:53 |
| nettings | rgareus, still, that's only a command reference. quite terse... | 09:53 |
| rgareus | nettings: how long does it take before the A/C sync becomes noticable? | 09:56 |
| rgareus | nettings: can you offline encode a short dump from disk using the same command? | 09:57 |
| rgareus | cat dump.dv | ffmpeg -f dv -i - -s 360x288 -b:v 180k -b:a 48k -f webm -avoid_negative_ts 1 - > dump.webm | 09:57 |
| rgareus | and check that the file is OK. | 09:57 |
| nettings | rgareus, not now, need to catch a train... | 09:58 |
| rgareus | L | 09:58 |
| rgareus | K | 09:58 |
| nettings | there are dv dumps in /local/ | 09:59 |
| nettings | fwiw. | 09:59 |
| rgareus | found them | 10:00 |
| rgareus | weird locale | 10:00 |
| rgareus | ls -l prints 17.03.2015 as date. that look soooo wrong | 10:01 |
| nettings | not my machine... manjaro linux. nice if you know how to use it :) | 10:01 |
| nettings | i dont :( | 10:01 |
| rgareus | a couple of our scripts may fall over | 10:01 |
| rgareus | anyway i'll check a short one lac15-17-08-56-03.dv 49MB | 10:02 |
| rgareus | catch your train. I'll talk to you later | 10:03 |
| nettings | guess i got it. | 10:10 |
| nettings | needs an audio source attached first, to pin the sample rate. cams are not reliable. | 10:10 |
| rgareus | what ? the train or the error? | 10:10 |
| nettings | error. | 10:10 |
| nettings | train, not sure :) | 10:10 |
| nettings | talk later? | 10:10 |
| rgareus | yes | 10:10 |
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| nettings | . | 11:28 |
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| nettings | aaaah. umts on the train sucks soo bad. | 11:43 |
| * nettings wonders about the doppler shift of a 1.8ghz carrier at 300 km/h... should be negligible, no? | 11:45 | |
| rgareus | nettings: E/M wave? c is constant. always fixed. There's no such thing as doppler | 11:55 |
| rgareus | well, you do get a red-shift. | 11:56 |
| rgareus | but really. speed of light is orders of magntitude faster than your train | 11:57 |
| AndreeeCZ_ | what train is that :-O | 11:59 |
| rgareus | the earth itself has a much higher speed | 12:00 |
| rgareus | nettings: the problem is likley the train's repeater. the train moves to cell-phone cells too fast. So they tunnel all traffic via some custom line.d | 12:03 |
| rgareus | s/to/through/ | 12:03 |
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| falktx | almost there! | 15:24 |
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| drobilla | Oh, boo hoo, the internet on your 300km/h train isn't ideal :P | 15:57 |
| rgareus | drobilla: did you arrange travel already? | 16:06 |
| rgareus | drobilla: will you be around in time for the pre-conference drinks (wed night)? | 16:07 |
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| drobilla | rgareus: No... I'm stuck waiting on schedule info from my advisor... and balking at trying to figure out a meandering patth home... :/ | 16:12 |
| drobilla | I really don't feel like planning right now, I might just arrive and leave for the conf | 16:12 |
| drobilla | rgareus: Wasn't planning on coming early, but I can see if a flight works out | 16:12 |
| rgareus | drobilla: since the conference starts thursday morning. arriving late on wed does make sense, doesn't it? | 16:13 |
| drobilla | rgareus: oh, right. Yeah, I should be in Wed at some point | 16:14 |
| rgareus | I don't know if albert already sent out an email, but there'll be a pre-conference drink/dinner starting 8pm ... on Wed | 16:15 |
| rgareus | same place where the sound-night will be (on campus) | 16:15 |
| rgareus | the bar's called "the Baron" | 16:16 |
| rgareus | aggraef: can we update the "on campus" part at http://lac.linuxaudio.org/2015/travel ? | 16:18 |
| LAbot | Title: LAC 2015: Travel & Stay [Linux Audio Conference] (at lac.linuxaudio.org) | 16:18 |
| rgareus | aggraef: unless I'm missing something the Baron is not included there, nor explicitly shown on the JGU campus map | 16:19 |
| rgareus | open-street-maps however knows about it. | 16:20 |
| drobilla | There's a link to the site which has the address | 16:22 |
| rgareus | 18 degC summer has arrived. | 16:44 |
| falktx | where is that? | 16:46 |
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| drobilla | We had a +8 tease the other week, then -14 again, as it usually goes | 16:55 |
| drobilla | -2 now, but in spring around here, that's pretty much t-shirt weather :) | 16:55 |
| falktx | -14 ? | 16:57 |
| falktx | is that C or F ? | 16:57 |
| nettings | falktx: with canadians, it's probably °R :-P | 17:04 |
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| drobilla | We use sensible units like the rest of the world except 'merka, thank you very much :P | 17:05 |
| falktx | so -14 C? that is indeed cool | 17:05 |
| * drobilla uses the googles to see what -14F would be | 17:06 | |
| drobilla | -25C. That would be unusual in March | 17:07 |
| rgareus | nettings: I checked with cat | ffmpeg > out.webm # but only the short file so far. that's in sync. | 17:40 |
| rgareus | nettings: on the upside the lac-title tool still works. | 17:42 |
| rgareus | http://robin.linuxaudio.org/tmp/lac15_test.webm | 17:42 |
| rgareus | pretty static. I'll have to think up an anmimation sequence. | 17:43 |
| rgareus | the CCRMA & Stanford logos lend themselves a lot better for animation | 17:49 |
| rgareus | we need some small movement. that helps a lot to see the stream is rolling even if in standby. | 17:50 |
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| drobilla | rgareus: Well, tues. happens to be the cheapest time to leave anyway, though arrival wed. 7am, so whether I'm still awake or vaguely coherent by dinner is very much in question :) | 20:54 |
| * falktx has met someone from lac 2014 a few days ago | 20:56 | |
| wrl | oh wow :) | 20:57 |
| wrl | who? | 20:57 |
| falktx | he pinged me on twitter, let me check | 20:57 |
| falktx | Sam Tuke | 20:57 |
| falktx | https://twitter.com/samtuke | 20:57 |
| LAbot | Title: Sam Tuke (@samtuke) | Twitter (at twitter.com) | 20:57 |
| falktx | gianMOD: did you met him^ last year? | 20:58 |
| falktx | I'm not sure... | 20:58 |
| falktx | he seems to work on crowfunding | 20:59 |
| gianMOD | falktx: not sure | 20:59 |
| gianMOD | i met so many people :-) | 20:59 |
| falktx | including me :P | 20:59 |
| wrl | damn i'm not following you on twitter! | 20:59 |
| wrl | fixed | 20:59 |
| falktx | meh | 21:00 |
| falktx | I tried to start posting random stuff on twitter, but I don't like that kind of self-attention | 21:00 |
| falktx | plus my phone doesn't do twitter :( | 21:00 |
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| falktx | nilsge: you're in germany too right? | 21:15 |
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| * drobilla gets all excited about a St. Patrick's Day flight promo......... aaaaaaaaaaand, woo, $20 off | 21:37 | |
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| aggraef | rgareus: I'm currently busy with proceedings and various other things, will have a look asap. | 23:14 |
| aggraef | rgareus: But I'm not sure that they have rooms for the general public at all, they are not a hotel. | 23:16 |
| aggraef | rgareus: And we already booked all rooms there that we could get for our guests. | 23:17 |
| aggraef | rgareus: oops, sorry, I just noticed that you were talking about the Baron, not the B. Wischmann house | 23:25 |
| aggraef | rgareus: yeah, i'll look into that if I find the time | 23:26 |
| aggraef | rgareus: in any case, we are preparing a map which will be in the printed info for participlants, with all the venues including the Baron clearly marked | 23:27 |
| drobilla | Speaking of logistics, how irresponsible is it to show up at the Frankfurt airport without plans and assume some kind of train will get me to Mainz in relatively short order? | 23:36 |
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| aggraef | drobilla: shouldn't be a big problem, at least during the day | 23:49 |
| aggraef | drobilla: you can check the schedule here (in English): http://www.bahn.de/p_en/view/index.shtml | 23:50 |
| LAbot | Title: bahn.de - Your online travel booking tool (at www.bahn.de) | 23:50 |
| drobilla | aggraef: OK, thanks | 23:52 |
| * drobilla is trying to eliminate things to be stressed out about :) | 23:52 | |
| aggraef | drobilla: look for trains going from "Frankfurt(M) Flughafen Fernbf" to "Mainz Hbf" | 23:53 |
| aggraef | drobilla: there are fast trains (ICE), but they're expensive | 23:53 |
| aggraef | drobilla: and slow but cheap ones (S-Bahn) | 23:53 |
| aggraef | drobilla: np, you're welcome. and don't stress out -- at least not before I do ;-) | 23:54 |
| drobilla | aggraef: I doubt the slowest trains you have are as slow as the only ones we do :) | 23:55 |
| drobilla | I'm a PhD student, being maximally stressed out is essentially my job. Just attempting to keep the dread of having to plan trips and deal with unfamiliar circumstances and so on from pushing that well into the realm of even less sustainable. | 23:59 |
| * drobilla votes May next time, please | 23:59 | |
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