I've noticed a strange bug in GEM (or ffmpeg) whereby the background colour, set by [gemwin], isn't captured with [pix_record] if codec 33 is selected. For me this codec is listed as "x264 H.264 (MPEG4 AVC) encoder"
See the attached patch for an example. I'm capturing both video and pictures to show that it's a specific problem with [pix_record] and not with [gemwin]
Is there any way around this or how to fix it?
I'm using pd-extenedd 0.43.4 and ffmpeg 6:0.8.9-0ubuntu0.13.10.1
Thanks
Antonio
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On 2013-12-18 10:35, Antonio Roberts wrote:
I've noticed a strange bug in GEM (or ffmpeg) whereby the background colour, set by [gemwin], isn't captured with [pix_record] if codec 33 is selected. For me this codec is listed as "x264 H.264 (MPEG4 AVC) encoder"
See the attached patch for an example. I'm capturing both video and pictures to show that it's a specific problem with [pix_record] and not with [gemwin]
Is there any way around this or how to fix it?
hard to tell.
i tried reproducing your problem but couldn't (i think). i've uploaded the the (movie) output of your patch to [1].
the square and the background are not really in sync (so you sometimes see the square), which i think is an artifact of double rendering.
i had to install the "x264" package (version 2:0.133.2339+git585324f-2+b1 on debian) for x264 support. please also note that debian does not ship ffmpeg but instead uses libav, and i have forgotten how libquicktime (which is the actual framework Gem uses for recording) interact (or not) with ffmpeg/libav to access the x264 codec....
and i had to run the entire thing within gdb, else it would crash (for whatever reasons it does not crash when run in gdb...)
fgmasdr IOhannes
[1] http://iem.at/~zmoelnig/tmp/gem_x264.mov
the square and the background are not really in sync (so you sometimes see the square), which i think is an artifact of double rendering.
I noticed that too but for this purpose it's not important.
i had to install the "x264" package (version 2:0.133.2339+git585324f-2+b1 on debian) for x264 support. please also note that debian does not ship ffmpeg but instead uses libav, and i have forgotten how libquicktime (which is the actual framework Gem uses for recording) interact (or not) with ffmpeg/libav to access the x264 codec....
I've removed ffmpeg and it still happens. I've always had libav on this machine but also have ffmpeg because kdenlive depends on it.
and i had to run the entire thing within gdb, else it would crash (for whatever reasons it does not crash when run in gdb...)
Strangely enough, I tried reinstalling pd extended and libav and now it crashes for me each time. The [pix_record] help patch doesn't. No error messages either, which isn't very helpful
Antonio
On 18 December 2013 10:06, IOhannes m zmoelnig zmoelnig@iem.at wrote:
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On 2013-12-18 10:35, Antonio Roberts wrote:
I've noticed a strange bug in GEM (or ffmpeg) whereby the background colour, set by [gemwin], isn't captured with [pix_record] if codec 33 is selected. For me this codec is listed as "x264 H.264 (MPEG4 AVC) encoder"
See the attached patch for an example. I'm capturing both video and pictures to show that it's a specific problem with [pix_record] and not with [gemwin]
Is there any way around this or how to fix it?
hard to tell.
i tried reproducing your problem but couldn't (i think). i've uploaded the the (movie) output of your patch to [1].
the square and the background are not really in sync (so you sometimes see the square), which i think is an artifact of double rendering.
i had to install the "x264" package (version 2:0.133.2339+git585324f-2+b1 on debian) for x264 support. please also note that debian does not ship ffmpeg but instead uses libav, and i have forgotten how libquicktime (which is the actual framework Gem uses for recording) interact (or not) with ffmpeg/libav to access the x264 codec....
and i had to run the entire thing within gdb, else it would crash (for whatever reasons it does not crash when run in gdb...)
fgmasdr IOhannes
[1] http://iem.at/~zmoelnig/tmp/gem_x264.mov -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.15 (GNU/Linux) Comment: Using GnuPG with Icedove - http://www.enigmail.net/
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IOhannes m zmoelnig