Right now, we distinguish the different version based on the libavformat soname (53, 54 or 55) which is almost useless in determining which version of ffmpeg is present. version 54 is used for ffmpeg 1.2 to 2.2 libav 1.0 also uses 54 If we were to only support version 55 and later ;we would restrict ffmpeg version that works very well. We should change our selection of ffmpeg/libav based on the libavcodec instead (as this is what we're using) and be able to check the minor revision.

Rename ; as really this is the ultimate goal of this bug

And probably others. When multhreading decoding is enabled ; the frames dimensions were incorrectly set.

https://hg.mozilla.org/integration/mozilla-inbound/rev/97a161382b60 https://hg.mozilla.org/integration/mozilla-inbound/rev/60560a4a7f41 https://hg.mozilla.org/integration/mozilla-inbound/rev/0f7f4567efef

https://hg.mozilla.org/mozilla-central/rev/97a161382b60 https://hg.mozilla.org/mozilla-central/rev/60560a4a7f41 https://hg.mozilla.org/mozilla-central/rev/0f7f4567efef

Comment on attachment 8664073 [details] [diff] [review] P1. Add method to determine which version of libavcodec is available. This is a request for all patches in this queue. Approval Request Comment [Feature/regressing bug #]: 1214943 [User impact if declined]: Decode failure with early libAV version (ubuntu 12.04) [Describe test coverage new/current, TreeHerder]: In central for a few weeks. [Risks and why]: Low, we properly handle an API discrepancy. [String/UUID change made/needed]: None

Comment on attachment 8664073 [details] [diff] [review] P1. Add method to determine which version of libavcodec is available. More checks for compatibility for ffmpeg. OK to uplift to aurora.

https://hg.mozilla.org/releases/mozilla-aurora/rev/8de5b42cda2d https://hg.mozilla.org/releases/mozilla-aurora/rev/37cb06914ad6 https://hg.mozilla.org/releases/mozilla-aurora/rev/702f9f750869