Log Message:
Changes 2.2.2:
* lavd/opengl_enc: fix pixel data alignment
* ffmpeg: print an error at the end if conversion failed
* avfilter/graphdump: Fix pointer to local outside scope
* ffmpeg_filter: fix pointer to local outside scope
* avcodec/mjpegdec: Fix undefined shift
* avformat/h263dec: Fix h263 probe
* avfilter/filtfmts: Support dynamically allocated in/outputs
* iavcodec/vc1dec: Fix missing {}
* more...