Comment 29 for bug 1260788

(In reply to Edwin Flores [:eflores] [:edwin] from comment #6)
> Compiles fine on my Mac; audio works, but gstreamer fails to build the
> pipeline for video. I can get video to play from gst-launch with `filesrc !
> qtdemux ! vtdec_h264 ! videoconvert ! autovideosink'. When trying to play
> through Firefox though, video goes through `qtdemux ! multiqueue !
> h264parse' and stops there. Will attach pipeline dump.

Found it! vtdec_h264 has GST_RANK_NONE, but playbin filters down to only GST_RANK_MARGINAL.

This should be fine, though. If we're include gstreamer in the build, we can just patch over it to set the rank higher.