| Saturday, October 27th, 2012, 00:08 UTC | ||
| [00:08:21] | danielk22: | uglyoldbob: Yep. At least since the OSD was ported to MythUI. |
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| [00:23:59] | ewindisch: | Can someone tell me how mythtv gets its stream from an hdhomerun? Does it pull the stream itself, or does it depend on some elgato utilities to save the stream to disk? |
| [00:24:25] | ewindisch: | I'm not familiar with the mythtv source yet — I've glanced at it and it wasn't obvious where it was getting the stream from. |
| [00:24:34] | ewindisch: | (but I was looking at places like capture.cpp...) |
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| [00:28:17] | ewindisch: | or maybe just libhdhomerun? ;-) hmm |
| [00:36:18] | wagnerrp: | libhdhomerun is a modified version of the libraries released by SiliconDust |
| [00:36:30] | wagnerrp: | Elgato doesn't factor into this anywhere |
| [00:37:02] | wagnerrp: | since they really have nothing to do with the HDHomeRun beyond selling a rebranded unit |
| [00:41:44] | ewindisch: | sorry, I meant silicondust |
| [00:42:44] | ewindisch: | wagnerrp: I'm just trying to assess the difficulty of getting a mythtv backend on freebsd up and running, given that the capture would be from the hdhomerun |
| [00:42:58] | ewindisch: | which should be easier than with other capture devices, since it isn't v4l ;-) |
| [00:43:08] | ewindisch: | I'm starting to think it won't be too terrible. |
| [00:43:13] | wagnerrp: | also sounds like a discussion for #mythtv-users |
| [00:43:19] | wagnerrp: | this is the development channel |
| [00:43:44] | ewindisch: | ah, sorry. |
| [00:44:36] | ewindisch: | although, to be fair, I suspect I might need to do some development for this to all work :) |
| [00:45:04] | ewindisch: | (freebsd backend with libhdhomerun …. xbmc-dvr frontend /w mythtv plugin on a raspberrypi frontend) |
| [00:45:10] | wagnerrp: | nope, i'm happy to answer questions in the other channel |
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| [01:20:00] | uglyoldbob: | how hard would it be to change the code to draw the video and handle the on screen display in separate threads? |
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| [10:31:30] | stuartm: | that's not the problem, the error handling not yielding to the event thread periodically is the issue |
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| [20:44:37] | danielk22: | uglyoldbob: stuartm: I only notice sluggishness in the OSD when we are pulling data from the backend. This can require a couple MythProto roundtrips to the server + a few DB queries and it is all done with blocking calls in the UI thread. I bet if that were handled in a helper thread the UI would be very responsive. |
| [20:48:17] | stuartm: | danielk22: there's a known problem (known to me anyway) where we block for prolonged periods when trying to recover from some errors, it seems we go into a tight loop when trying to fill buffers or similar and that prevents the user from skipping/exiting playback |
| [20:48:50] | danielk22: | stuartm: I didn't know about that. Do you have samples? |
| [20:49:03] | stuartm: | based on what uglyoldbob was describing in -users the other night he's seeing the same problem |
| [20:49:42] | stuartm: | danielk22: I don't, I have an annoying habit of deleting without thinking when I've finished watching, but uglyoldbob might |
| [20:50:35] | danielk22: | I have one recording group called 'Debug' that I send potentially useful recordings to :) |
| [20:51:07] | danielk22: | Of course things may sit there for years before I get to them... but that is a different problem! |
| [20:53:47] | stuartm: | yeah, what generally happens is that I encounter a problem, it's annoying but I get past and continue watching, by the end of the programme I've forgotten about the issue and I've already deleted it before I remember again |
| [20:57:11] | stuartm: | I can sometimes repro with DVDs if I skip around enough or try ffwd/rewd a few times, anything that starves buffers enough – similar results can sometimes be had doing the same on files with no seektable, if you get it confused enough then it becomes irrecoverable |
| [20:58:23] | stuartm: | in theory that should apply to any sample, but may depend on the speed of the system |
| [20:58:52] | danielk22: | hmm, I've been seeing something strange with seeks for a while. I zoom with "W" a couple times but then when I skip past the commercial I lose my zoom and have to zoom in again. |
| [20:59:12] | danielk22: | probably unrelated though. |
| [21:02:32] | stuartm: | out of interest I just started playback of a recording, I jumped back/forth rapidly hitting the start of the file a couple of times, after which it was spewing av-sync errors and displaying visual artefacts |
| [21:03:53] | danielk22: | hmmm, that's what someone reported seeing after trying my fast ringbuffer code. so maybe it's just making an existing problem more prominent. |
| [21:04:36] | stuartm: | http://pastebin.com/1YReQaWH |
| [21:05:19] | stuartm: | ordinary logs don't say a great deal, when I've more time on my hands I'll produce some verbose ones |
| [21:06:24] | danielk22: | well the audio being 5+ seconds off is huge, like there is some buffer not being cleared. |
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| [21:06:52] | danielk22: | And queuing up 220 video frames would surely make things sluggish! |
| [21:07:08] | stuartm: | avoiding these problems to begin with would be great, but more interesting to me at least would be improving recovery once we're in these error states, that's one area that doesn't get much testing and consequently once broken it remains that way for a very long time |
| [21:09:00] | danielk22: | stuartm: This isn't holding up the UI thread directly, the decoding is done in a separate thread. We must be waiting on the decoding in a blocking manner somewhere. |
| [21:10:09] | stuartm: | danielk22: yeah, I'm going off at a tangent here, this particular problem doesn't exhibit the UI block, that tends to correlate to prebuffering pause warnings in the logs |
| [21:11:28] | danielk22: | I have to spend a bit of time on the player code. |
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| [21:14:45] | stuartm: | if I find another file I can repro with I'll make sure to keep it, in the mean time I'll see if we can get a sample from uglyoldbob |
| [21:18:21] | danielk22: | uglyoldbob: ^^^ |
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| [23:18:20] | uglyoldbob: | how do i stop a recording currently in progress? |
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