ffmpeg TODO list:
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Fabrice's TODO list: (in approximate decreasing priority order)
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- add av_log() in libavcodec and suppress all printf
- commit new imgconvert API and new PIX_FMT_xxx alpha formats
- new ffplay based on qemacs x11/fb/vt100 GUI.
- commit av_read_frame() API and associated support in libavcodec:
  ffserver will be able to stream MPEG and MPEG4 files in
  RTSP/RTP/SDP.
- add new float/integer audio filterting and conversion
- commit new LGPL'ed float and integer-only AC3 decoder
- add WMA integer-only decoder
- integrate custom Vorbis Tremor based integer and float decoder
- add new MPEG4-AAC audio decoder (both integer-only and float version)
- fix telecine and frame rate conversion