| Thursday, August 30th, 2012, 00:18 UTC | ||
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| [00:34:25] | ** neufeld now has closed captions on HD-PVR recordings ** | |
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| [01:11:24] | jpabq: | neufeld, How did you pull that off? |
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| [01:16:30] | neufeld: | jpabq: So, component cables from the STB go to the HD-PVR. I also ran composite cables to one of my PVR-500 inputs, because the STB produces VBI data in its standard-definition stream even when tuned to an HD channel. Put that tuner and the HD-PVR into the same recording group so that MythTV doesn't try to use both together, then used the system event scripts to run ccextractor on the PVR-500 /dev entry. A bit of |
| [01:16:31] | neufeld: | fiddling in the recording-end script to copy the resulting .srt file into the storage directory, and we have a .srt file sitting next to the HD-PVR's .mpg file. MythTV will use the .srt file if present. Presto! |
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| [01:34:23] | jpabq: | neufeld, cool. I have a PVR-500 on a shelf somewhere. Are you going to put instructions on the wiki? |
| [01:36:04] | clever: | neufeld: neat! |
| [01:39:14] | neufeld: | jpabq: yeah, just getting all my notes together. The awkwardness is because the HD-PVR takes time to lock on, but the PVR-500 starts streaming immediately, so the script has to figure out the time corrections, and I just realized that the STARTTIMEISOUTC is giving me times that end in 0 seconds, but my recordings start at -50 seconds, so I need a new mechanism for timing (i.e. a 10:00 recording fires its scripts at |
| [01:39:14] | neufeld: | 9:59:10, but the scripts receive STARTTIMEISOUTC at 9:59:00, corrected for time zone). I'm going to run a few more tests on it and then make a new page on the wiki. Might be a day or two. |
| [01:40:25] | wagnerrp: | you could record the system timestamp at the beginning of the recording, and match that against recstartts of the recording |
| [01:40:44] | wagnerrp: | not the beginning of the recording... beginning of the ccextractor run |
| [01:42:14] | clever: | but how much of a delay is there in the HD-PVR encoder?, its not instant analog in, digital out |
| [01:42:21] | neufeld: | wagnerrp: yeah, that what my current attempt is doing. Just before starting ccextractor, it writes "date +%s" into a file so that my resolution script can use it. But these are just fiddly details, the basic idea is sound. |
| [01:44:24] | neufeld: | clever: well, I'm currently trying to use the total length of the HD-PVR recording stream, comparing that to the time total duration of the ccextractor run, and assuming that they end together. If there's a constant bias, I can just add that into the math. And subtitles don't have to be bang on, one or two seconds either way is manageable. |
| [01:45:19] | clever: | i mostly just use the subtitles for when the 'background' music is too loud and ceases to be background |
| [01:45:31] | clever: | one or 2 seconds seems good enough |
| [01:50:44] | neufeld: | I've done a lot of caption stuff over the years, my wife can't fully enjoy shows without them. I worked with Hans to get VBI working for NTSC in the ivtv PVR-500 driver, and then posted to the wiki a big script to H.264 transcode and cut recordings while preserving captions. Another script puts the captions right into the .mpg stream where mplayer can see them and optionally display them, for on-the-road viewing on |
| [01:50:44] | neufeld: | a non-MythTV laptop. |
| [01:53:07] | clever: | neufeld: one big problem i had (years ago) |
| [01:53:19] | clever: | a bug in the pvr-150 driver caused vbi to hard-lock the system |
| [01:53:36] | clever: | and the only way around it was to disable vbi, which ALSO disabled displaying CC from existing files |
| [01:53:45] | clever: | so you lost CC on everything you already had |
| [01:55:15] | neufeld: | Hmm. I never experienced that, and I believe I was using VBI data on the PVR-xxx before you were (since I was toggling registers and patching code to get it going in the first place). I guess there was a module bug introduced and then fixed somewhere along the way, and I skipped it. |
| [01:55:53] | clever: | yeah, when i first got the card, it locked the system instantly |
| [01:56:04] | clever: | the first driver i was running caused that bug 100% of the time |
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| [20:32:57] | DougMac: | stichnot: I've attached my valgrind.log to ticket #11029 |
| [20:32:57] | ** MythLogBot http://code.mythtv.org/trac/ticket/11029 ** | |
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| [20:40:28] | DougMac: | ls |
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| [21:33:13] | dekarl: | sphery, times without explicit time zone/offset are supposed to be UTC (instead of floating local time), explicit local time is perfectly valid. |
| [21:33:13] | dekarl: | There are grabbers out there in the wild with floating local time, so I've added a new filter, tv_augment_tz, to xmltv 0.5.63. If the xmltv timezone setting gets dropped we should refer to it in the release notes. Here's the discussion that led to the creation of the filter http://sourceforge.net/mailarchive/message.php?msg_id=29379739 |
| [21:49:24] | sphery: | dekarl: nice, and thanks for the info |
| [21:50:03] | sphery: | seems the plan is to drop that setting and always do what we currently do for auto, but with that filter, even users with broken grabbers will have a workable solution |
| [21:51:38] | dekarl: | aye, there's a vocal minority out there |
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| [22:55:08] | DougMac: | stichnot: I've updated 11029 again with a combined valgrind and mythavtest log. Hopefully that's of some use. |
| [22:56:56] | stichnot: | DougMac: are those based on the 6 MB sample you linked to? |
| [22:57:22] | DougMac: | Yes, that's correct |
| [22:57:25] | stichnot: | and thanks for running the data. |
| [22:58:08] | stichnot: | OK. I need to look at my own valgrind output against that particular sample. (So far I've been looking at a different sample.) |
| [22:59:36] | DougMac: | If there's anything else I can do let me know. |
| [23:04:13] | stichnot: | Thanks, will do. (Things are slow due to a work crunch, plus not being able to reproduce the crash) |
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| [23:11:11] | DougMac: | It started happening for me in 0.25 (although the crashes were infrequent) – as no one else reported a problem I thought it must be something to do with my configuration |
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