Log Message:
version 3.1.2:
- cmdutils: remove the current working directory from the DLL search path on win32
- avcodec/rawdec: Fix palette handling with changing palettes
- avcodec/raw: Fix decoding of ilacetest.mov
- avformat/mov: Enable mp3 parsing if a packet needs it
- avformat/hls: Use an array instead of stream offset for stream mapping
- avformat/hls: Sync starting segment across variants on live streams
- avformat/hls: Fix regression with ranged media segments
- avcodec/ffv1enc: Fix assertion failure with non zero bits per sample
- avfilter/af_hdcd: small fix in af_hdcd.c where gain was not being adjusted for \ 
"attenuate slowly"
- avformat/oggdec: Fix integer overflow with invalid pts
- ffplay: Fix invalid array index
- avcodec/alacenc: allocate bigger packets (cherry picked from commit \ 
82b84c71b009884c8d041361027718b19922c76d)
- libavcodec/dnxhd: Enable 12-bit DNxHR support.
- lavc/vaapi_encode_h26x: Fix a crash if "." is not the decimal separator.
- jni: Return ENOSYS on unsupported platforms
- lavu/hwcontext_vaapi: Fix compilation if VA_FOURCC_ABGR is not defined.
- avcodec/vp9_parser: Check the input frame sizes for being consistent
- avformat/flvdec: parse keyframe before a\v stream was created \ 
add_keyframes_index() when stream created or keyframe parsed
- avformat/flvdec: splitting add_keyframes_index() out from parse_keyframes_index()
- libavformat/rtpdec_asf: zero initialize the AVIOContext struct
- libavutil/opt: Small bugfix in example.
- libx264: Increase x264 opts character limit to 4096
- avcodec/h264_parser: Set sps/pps_ref
- librtmp: Avoid an infiniloop setting connection arguments
- avformat/oggparsevp8: fix pts calculation on pages ending with an invisible frame
- lavc/Makefile: Fix standalone compilation of the svq3 decoder.
- lavf/vplayerdec: Improve auto-detection.
- lavc/mediacodecdec_h264: properly convert extradata to annex-b
- Revert "configure: Enable GCC vectorization on ≥4.9 on x86"