[FFmpeg-user] Custom Threading

[Robert Nagy]

In avfilter it is very easy to override the default threading
implementation by just assigning to AVFilterGraph->execute.

However, this doesn't seem to be possible avcodec. You can't just simply
assign to AVCodecContext->execute(2) since ffmpeg internally always
initializes it's own threading.

Am I missing something? Is it possible to do custom threading with avcodec
somehow?