| Sunday, December 16th, 2012, 00:07 UTC | ||
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| [03:50:39] | danielk22: | stuartm: FYI Handling the disconnect properly won't fix the connect segfault. But it will fix another potential segfault. |
| [03:51:45] | jya: | danielk22: are you there? |
| [03:52:29] | jya: | I lodged a bug for the issue I'm seeing over storage group… #11293 |
| [03:52:29] | ** MythLogBot http://code.mythtv.org/trac/ticket/11293 ** | |
| [03:53:27] | danielk22: | stichnot: Is this a commit I should look at? My only concern would be for the update not to block a recorder thread. The reason we handle the keyframe updates in another thread is that doing it in one of the recorder threads caused a lot of headaches. |
| [03:54:44] | jya: | from what I've seen with those videos, is that ffmpeg issue a seek very often.. this pretty much expose an issue with the handling of remote file. As we seek, we then try to cache data in the ringbuffer in advance for future use. This works well for content that is going to require linear access.. but for everything else, it just doesn't work at all |
| [03:55:41] | jya: | interestingly, if i place the same file on a http server, and play using http://URL, it plays perfectly over the same network. myth allows to seek or jump at a file. Bookmark even works ! |
| [03:56:34] | jya: | that go me thinking… instead of re-inventing the wheel with storage group with our own protocol, why not emulate a plain http server where the URL would be the same as if accessing SG now |
| [03:58:59] | danielk22: | jya: The RingBuffer is very much designed for linear access. I guess "non-interleaved" means the video content is in one part of the file and audio is in a completely different part? |
| [03:59:32] | jya: | danielk22: to be honest, i have no idea… When I change the ffmpeg code so it thinks it's interleaved, it plays perfectly... |
| [03:59:49] | jya: | so i don't actually know if the file is really interleaved or not |
| [04:01:30] | jya: | for the time being, i just reverted the change in ffmpeg that caused the file to be marked as non-interleaved. https://github.com/MythTV/mythtv/commit/f1540 . . . 1b185b791821 |
| [04:02:01] | jya: | it had been like this for years, so I figured NI detection isn't that important |
| [04:02:31] | danielk22: | jya: I will take a look at what is happening with that sample you sent me next week. I will definitely have some spare time next week. |
| [04:02:54] | jya: | you'll have to revert f1540fe05ee15d1f53fe30e137931b185b791821 to properly test it |
| [04:03:02] | danielk22: | Yup |
| [04:03:39] | jya: | i've back ported that change to 0.26, because otherwise my kids can't watch many of my disney cartoon collection |
| [04:03:59] | jya: | i can't remember what i used to do the DVD.. was a long time ago |
| [04:04:41] | danielk22: | AVI files are a form of RIFF file which is divided up into chunks. My guess is interleaved means the chunk structure is {AVAVAVAV...} while non-interleaved is {AAAA..VVVV..} |
| [04:05:17] | jya: | but if the file is marked as interleaved, why would it play just as well? |
| [04:06:00] | danielk22: | Well if it is structured with audio first we'll just read all the audio in a few milliseconds and then slowly read the video. |
| [04:06:02] | jya: | i will raise a problem in ffmpeg just in case |
| [04:06:49] | jya: | i'm a bit wary about posting bugs on ffmpeg |
| [04:06:56] | jya: | often i made a foul of myself :) |
| [04:07:01] | danielk22: | In theory reading a little bit of audio then a little bit of video then a little bit of audio then a little bit of video will allow faster startup with NI content. But in practice it throws off our buffering. |
| [04:08:44] | danielk22: | When I added the optimization to for the seek to end read I though about making it a general seek optimization, but I didn't see any good reason for it at the time; if this is as I suspect it may be a good reason :) |
| [04:09:23] | danielk22: | Anyway it is bed time for me. I have the sample and will have some time soon enough.. |
| [04:13:41] | jya: | good night |
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| [05:19:25] | stichnot: | danielk22: thanks, good point about making sure keyframe updates don't block the recorder thread. I don't have anything ready yet to commit or review. |
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| [10:28:18] | stuartm: | danielk22: yeah I wasn't expecting it to fix that segfault |
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| [17:40:44] | jpabq: | jya: I installed the ffmpeg branch and used it for a few hours. I did not notice any problems. It also *seems* faster — playback starts up faster. |
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| [17:55:40] | Technodrome: | is there any DVR device where I can pull mpeg2's off the unit, i know some of the tivo's you could |
| [17:59:31] | dekarl: | tgm4883: superm1: any special reason to put libmythhdhomerun.so into libmyth-dev instead of libmyth-0.26–0.install? http://paste.ubuntu.com/1443852/ |
| [17:59:42] | dekarl: | I think its just an accident due to the filename |
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| [18:03:08] | dekarl: | Should both libmyth* lines be in the same file? Or should the library get a different name? |
| [18:06:31] | dekarl: | btw, I found that because the frontend is linked against the hdhomerun lib and I have not -dev packages installed in the netboot image |
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| [18:48:48] | stuartm: | jpabq: faster than current master? There was a commit a couple of weeks back specifically to speed up playback start up |
| [18:52:26] | dekarl: | if its ok I'll change the default audio track selection like this http://paste.ubuntu.com/1443905/ |
| [19:38:45] | stuartm: | dekarl: that looks fine to me |
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| [21:18:31] | jpabq: | stuartm: maybe not. My "master" was from a couple of weeks ago. |
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| [22:05:06] | stichnot: | bummer — it looks like after 3.5 years my HD-PVR may have broken |
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| [22:09:34] | dekarl: | stichnot: first idea was "bad cap" and it seems someone had the same thought :) http://valkyriemt.wordpress.com/2011/04/09/a- . . . ail-for-all/ |
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| [22:15:15] | jhezer_: | Man, that sucks |
| [22:15:54] | stichnot: | dekarl: I wonder if that could explain my problem. My backend refuses to recognize it — "usb 1–1.6: device descriptor read/64, error -32", "hub 1–1:1.0: unable to enumerate USB device on port 6" — while my laptop recognizes it but "cat /dev/video1 > /tmp/test.ts" captures only about 0.5MB |
| [22:16:51] | dekarl: | if you have another power plug with the same rating at hand its a quick test |
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| [22:19:22] | stichnot: | yeah, and it's a small investment to buy and try if I don't have one |
| [22:20:32] | dekarl: | aye, quite a bit less then a hdpvr2 (iirc it has a better encoder but no linux support, yet) |
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| [22:46:18] | stichnot: | dekarl: thanks for saving me a ton of money. :) My only test adapter is rated 1.2 amps, but it's enough for "cat /dev/video0" to produce content for at least several seconds. |
| [22:47:45] | dekarl: | :) |
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| [23:23:49] | stichnot: | This is pretty far OT, but I opened up the adapter to have a look. One cap is clearly bulging, but none have vented through the top. However, a couple sections are filled with some kind of hardened plastic-like goo. I guess this is either something that was randomly squirted in at assembly, or blown cap contents vented through the bottom. Which is more likely? |
| [23:27:02] | dekarl: | I'd say the latter based on the reasoning that these cheap devices don't contain parts that are not needed. So the manufacturer would not add goo without a reason to cut costs. |
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| [23:47:50] | jpabq: | stichnot: if you find a good place to buy replacement HD-PVR wall warts, please let me know. |
| [23:57:23] | jya: | jpabq: i wonder if the faster start time is related to how the video stream is detected. don't loop through all the codec anymore… Thanks for testing |
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