Segfault during playback of video files produce by Canon cameras

[skd5aner <skd5aner@…>]

Attempting to playback any video files produced by either of two Canon digital cameras I have, produces a segfault after the first frame is displayed within MythVideo. The cameras produce both produce an avi file, one is 320x240 (PowerShot SD100) the other is 640x480 (PowerShot SD700 IS).

I am able to succesfully play back the files in ffplay, and various other media players on OS X and Windows. However, both files also crashed mplayer. I also know, that within the older versions of mythgallery, these files appeared to play back succesfully (only tried once a while ago - never attempted within mythvideo).

These segfaults happened in .22-fixes, and I was hoping that maybe they had been resolved with more recent ffmpeg merge within .23-fixes, but I get the exact same results.

I am attaching 2 backtraces and 2 logs, 1 for each file from each camera (Just in case there's any difference). I will also try to attach videos, since they are <5MB each (~2 seconds). These files were created so I could share them for testing, but none of the videos from these cameras in my library will play within Myth.

Thanks!

mythfrontend --version Please include all output in bug reports. MythTV Version : 24035 MythTV Branch : branches/release-0-23-fixes Network Protocol : 56 Library API : 0.23.20100314-1 QT Version : 4.5.2 Options compiled in:

linux debug using_oss using_alsa using_pulse using_pulseoutput using_backend using_directfb using_dvb using_firewire using_frontend using_hdhomerun using_hdpvr using_iptv using_ivtv using_joystick_menu using_libfftw3 using_lirc using_mheg using_opengl_video using_opengl_vsync using_qtdbus using_qtwebkit using_v4l using_x11 using_xrandr using_xv using_bindings_perl using_bindings_python using_opengl using_vdpau using_ffmpeg_threads using_libavc_5_3 using_live using_mheg

[skd5aner <skd5aner@…>]

Here is the link to one of the videos I put on filebin: ​http://filebin.ca/czjogj/MVI_1141.AVI

Please let me know if you want me to upload the other video and logs.

[skd5aner <skd5aner@…>]

gdb for second file

[skd5aner <skd5aner@…>]

log for second file

[skd5aner <skd5aner@…>]

For completeness - here's the other video: ​http://filebin.ca/jrrfbj/MVI_0613.AVI

MVI_1141.AVI goes with gdb.txt and mythvideosegf.log MVI_0613.AVI goes with gdb.a.txt and mythvideosegf.a.log

Sorry for the multiple replies...

I'll wait to provide any more info until more is requested.

[Janne Grunau]

(In [24102]) AVFD: use direct rendering only for PIX_FMT_YUV420P

Fixes the segfault in Refs #8326

[Janne Grunau]

(In [24115]) backports [24102] from trunk

AVFD: use direct rendering only for PIX_FMT_YUV420P Fixes the segfault in Refs #8326

[Janne Grunau]

(In [24233]) AVFD: use av_find_stream_info also for DVD

This results in correctly set codec parameters and makes the workaround in [24145] redundant. Refs #8326

[Janne Grunau]

(In [24252]) AVFD: use direct rendering for DVDs

workaround for 0.23-fixes after [24115], Refs #8326

[skd5aner <skd5aner@…>]

Janne - Tested again with r24265 from the 0.23-fixes branch and I'm still seeing a segfault, as before the patches, while attempting playback of these files. Please let me know if there's any additional information you would like after the latest test.

[skd5aner <skd5aner@…>]

Just wanted to report back and that these videos no longer cause a segfault, and in addition play back just fine in 0.24. I'm guessing that the ffmpeg sync may have helped fix it. This ticket can be closed as fixed now.

Thanks!