MythLogBot@irc.freenode.net :: #mythtv

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Wednesday, March 25th, 2020, 02:12 UTC
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[10:29:17] Steve-Goodey: Wikipedia sidebar updated.
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[10:54:58] stuarta: Steve-Goodey: thanks
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[17:34:40] warpme_: guys: i'm bisecting old versions of master due frequent livetv lockups at channel changes on current master....and even for old ver. i'm getting "fatal error: exiv2lib_export.h: No such file or directory
[17:34:40] warpme_: #include "exiv2lib_export.h" how this is possible?
[17:44:10] hampton: That file should be in /opt/local/include/exiv2 (on my mac mini), or wherever your exiv2 headers live.
[17:46:06] hampton: Only git aa46cddd57 or 2c71865460 should be looking for that file in external/libexiv2/include/exiv2.
[17:51:21] stuarta: right, i'm off to do a laptop upgrade from f30 -> f31
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[18:59:55] warpme_: hampton: sure. but my head is scratched by other thing: i'm checking out master git from 2 weeks ago and trying to build it. and it fails with above error. Only thing changed in build system are mythtv sources. So why the checked-out sources at 2 weeks old git (g8bb58dd) level were building ok 2 weeks ago but now are failing? I looked on exiv2 package and there is NO exiv2lib_export.h file – so not strange that I don't
[18:59:55] warpme_: have this file in myth build environment. Only hypothesis which comes to my mind is that – by some reason – myth started to expect this file – even with past myth code levels or.....
[19:11:34] stuartm: I seem to recall that exiv was optional in the past, not sure if that still the case, possible that configure is enabling it because it believes it is installed due to the presence of other header?
[19:12:51] stuartm: exiv2 of course is for reading the exif data from photographs for what was mythgallery
[19:14:49] stuartm: seems it's not optional anymore or I'm just not remembering correctly
[19:14:55] stuartm: # Check that all MythTV build "requirements" are met:
[19:14:56] stuartm: enabled exiv2 && $(pkg-config --exists exiv2) ||
[19:14:58] stuartm: die "ERROR! You must have the Exiv2 image tag reader library installed to compile MythTV."
[19:15:49] stuartm: now there should be a header check in configure, that's absent ...
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[19:32:34] hampton: stuartm: I didn't see any checks there before. Configure always enabled exiv2, then the next reference to exiv2 is the one you posted. That implies that its unconditionally required.
[19:35:14] hampton: warpme_: Have you removed external/Makefile and rerun configure?
[19:45:08] stuartm: hampton: I'm not thinking recently, but a few years ago when I was still active I don't remember exiv2 being a mandatory requirement
[19:45:18] warpme_: stuartm: thx. sounds reasonably to me! but....i still don't understand why checkout g8bb58dd; build now fails. My assumption that: checkout <rev> gives exact 1:1 sources file set for <rev> with not single file more not single file less seems to be only part of story. Only theory I have is that building depends not only on sources – but also on previous build installed files....
[19:45:53] stuartm: it definitely wasn't for MythTV, obviously that only came into the base when the backend for mythgallery was folded in from plugins
[19:46:29] stuartm: but even when it was part of plugins, I would have sworn that exiv2 was optional
[19:47:47] warpme_: hampton: "Have you removed external/Makefile and rerun configure?" – so what I should see by this?
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[20:01:18] warpme_: hampton: btw: in https://github.com/MythTV/mythtv/commit/2807d . . . a57c9b40c808 I see You are importing 449821cd5d – but looking in https://github.com/Exiv2/exiv2/tree/449821cd5 . . . nclude/exiv2 I can't find exiv2lib_export.h file. hmmm.....
[20:03:52] hampton: It sound like your older checkouts may still be trying to build external/libexiv2. Deleting external/Makefile and forcing it to be rebuild from external/external.pro should eliminate that as a possibility.
[20:04:36] hampton: Not sure why that directory wouldn't compile though, unless the includes are mixed up somehow.
[20:09:12] hampton: The contents of exiv2lib_export.h look auto generated. Probably when you run cmake over the exiv2 sources. I probably copied it from my system into the external/libmyth2 directory since Myth doesn't use cmake.
[20:23:17] warpme_: It looks for me like issue is myth build process dependance on contents of /include/exiv2/ Now – in my case – it has mix of old (external exiv2 v0.25 I was using) and new (recent myth included copy of exiv2) files. I think current master (which has build-in exiv2) shouldn't install it's headers into /usr/include as user can have there different (system-wide) ver. of exiv2. Installing private mythtv's exiv2 files into
[20:23:17] warpme_: system-wide location makes system-wide exiv2 on undefined ver. I think I'm exactly experiencing this issue now...
[20:36:57] warpme_: fyi: I just reinstall system eviv2 and now myth builds ok. So hypothesis about pollution of system exiv2 by app (myth) seems to be correct for me. I would consider this as a bug.
[20:44:10] hampton: Agreed. I fixed that in the most recent commit to mythtv. It puts the embedded exiv2 headers into include/mythtv/exiv2.
[20:45:03] warpme_: thx!
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[21:13:50] gigem_: markk_: mythcommflag --rebuild --file reports "libva: vaGetDriverNameByIndex() failed with unknown libva error, driver_name = (null)" then "Failed to initialise VAAPI connection: -1 (unknown libva error)" before falling back to using ffmpeg. This is on a PC with an nvidia card. Do you have any idea why it even tries to use VAAPI? I would expect it to only use ffmpeg for this.
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