fix compilation error on windows
Add two new methods to the playing filter interface
Add two method to MSFilePlayer to get the duration of the file and the position of the playback
Compile msfileplayer.c on Android

Conflicts:
	src/videofilters/mkv.c
Check for encoding-capturer and decoder-renderer filters when looking for encoders and decoders.
few fixes
fix crash on windows 32 bit due to swscale making invalid read
fix bug around confusing between fps not known or format not supported
fix bug resulting in a bitrate set lower than the one expected
modify vp8 processing so that it can adapt to real framerate, resulting in better output bitrate.
Use a realistic value for processing time, in order to get better image quality.
Make ms_file_player to do not adapt the sampling rate of the decoder

A resampler filter is created instead
Add a render callback mechanism to the MS file player
modify the handling of gold, altref and last reference frames in order to avoid video to be blurred at each gold or altref frame generated.
repair audio-only build
Fix compilation in mkv.c
fix regression when setting up video pin of video recorder
Merge branch 'master' into dev_vp8_noblur
looks quite good: golden frame are no longer visible, works as before in lossy conditions
fix SLI matching with picture-ids
Allow video size to be increased during a call.