FFmpeg security fixes November 2015

FFmpeg 2.7.3 fixing a number of crashes and other potentially security relevant issues (including CVE-2015-8216, CVE-2015-8217 and CVE-2015-8219) was released.

From the upstream Changelog:

version 2.7.3:
- rtmpcrypt: Do the xtea decryption in little endian mode
- Update versions for 2.7.3
- avformat/matroskadec: Check subtitle stream before dereferencing
- avformat/utils: Do not init parser if probing is unfinished
- avcodec/jpeg2000dec: Fix potential integer overflow with tile dimensions
- avcodec/jpeg2000dec: Check SIZ dimensions to be within the supported range
- avcodec/jpeg2000: Check comp coords to be within the supported size
- avcodec/jpeg2000: Use av_image_check_size() in ff_jpeg2000_init_component()
- avcodec/wmaprodec: Check for overread in decode_packet()
- avcodec/smacker: Check that the data size is a multiple of a sample vector
- avcodec/takdec: Skip last p2 sample (which is unused)
- avcodec/dxtory: Fix input size check in dxtory_decode_v1_410()
- avcodec/dxtory: Fix input size check in dxtory_decode_v1_420()
- avcodec/error_resilience: avoid accessing previous or next frames tables beyond height
- avcodec/dpx: Move need_align to act per line
- avcodec/flashsv: Check size before updating it
- avcodec/ivi: Check image dimensions
- avcodec/utils: Better check for channels in av_get_audio_frame_duration()
- avcodec/jpeg2000dec: Check for duplicate SIZ marker
- tests/fate/avformat: Fix fate-lavf
- doc/ffmpeg: Clarify that the sdp_file option requires an rtp output.
- ffmpeg: Don't try and write sdp info if none of the outputs had an rtp format.
- apng: use correct size for output buffer
- jvdec: avoid unsigned overflow in comparison
- avcodec/hevc_ps: Check chroma_format_idc
- avcodec/jpeg2000dec: Clip all tile coordinates
- avcodec/microdvddec: Check for string end in 'P' case
- avcodec/dirac_parser: Fix undefined memcpy() use
- avformat/xmv: Discard remainder of packet on error
- avformat/xmv: factor return check out of if/else
- avcodec/mpeg12dec: Do not call show_bits() with invalid bits
- libavutil/channel_layout: Check strtol*() for failure
- avcodec/ffv1dec: Check for 0 quant tables
- avcodec/mjpegdec: Reinitialize IDCT on BPP changes
- avcodec/mjpegdec: Check index in ljpeg_decode_yuv_scan() before using it
- avutil/file_open: avoid file handle inheritance on Windows
- avcodec/h264_slice: Disable slice threads if there are multiple access units in a packet
- opusdec: Don't run vector_fmul_scalar on zero length arrays
- avcodec/ffv1: Initialize vlc_state on allocation
- avcodec/ffv1dec: update progress in case of broken pointer chains
- avcodec/ffv1dec: Clear slice coordinates if they are invalid or slice header decoding fails for other reasons
- avformat/httpauth: Add space after commas in HTTP/RTSP auth header
- avcodec/x86/sbrdsp: Fix using uninitialized upper 32bit of noise
- avcodec/ffv1dec: Fix off by 1 error in quant_table_count check
- avcodec/ffv1dec: Explicitly check read_quant_table() return value
- avcodec/rangecoder: Check e
- avutil/log: fix zero length gnu_printf format string warning
- lavf/webvttenc: Require webvtt file to contain exactly one WebVTT stream.
- avcodec/mjpegdec: Fix decoding RGBA RCT LJPEG
- avfilter/af_asyncts: use llabs for int64_t
- avcodec/g2meet: Also clear tile dimensions on header_fail
- avcodec/g2meet: Fix potential overflow in tile dimensions check
- avcodec/svq1dec: Check init_get_bits8() for failure
- avcodec/tta: Check init_get_bits8() for failure
- avcodec/vp3: Check init_get_bits8() for failure
- swresample/swresample: Fix integer overflow in seed calculation
- avformat/mov: Fix integer overflow in FFABS
- avutil/common: Add FFNABS()
- avutil/common: Document FFABS() corner case
- avformat/dump: Fix integer overflow in aspect ratio calculation
- avformat/mxg: Use memmove()
- avcodec/truemotion1: Check for even width
- avcodec/mpeg12dec: Set dimensions in mpeg1_decode_sequence() only in absence of errors
- avcodec/libopusenc: Fix infinite loop on flushing after 0 input
- avformat/hevc: Check num_long_term_ref_pics_sps to avoid potentially long loops
- avformat/hevc: Fix parsing errors
- ffmpeg: Use correct codec_id for av_parser_change() check
- ffmpeg: Check av_parser_change() for failure
- ffmpeg: Check for RAWVIDEO and do not relay only on AVFMT_RAWPICTURE
- ffmpeg: check avpicture_fill() return value
- avformat/mux: Update sidedata in ff_write_chained()
- avcodec/flashsvenc: Correct max dimension in error message
- avcodec/svq1enc: Check dimensions
- avcodec/dcaenc: clear bitstream end
- libavcodec/aacdec_template: Use init_get_bits8() in aac_decode_frame()
- rawdec: fix mjpeg probing buffer size check
- rawdec: fix mjpeg probing
- configure: loongson disable expensive optimizations in gcc O3 optimization
- videodsp: don't overread edges in vfix3 emu_edge.
- avformat/mp3dec: improve junk skipping heuristic
- avformat/hls: add support for EXT-X-MAP
- avformat/hls: fix segment selection regression on track changes of live streams
- lavf/matroskadec: Fully parse and repack MP3 packets
- avcodec/h264_mp4toannexb_bsf: Reorder operations in nal_size check
- avformat/oggenc: Check segments_count for headers too
- avformat/segment: atomically update list if possible
- avformat/avidec: Workaround broken initial frame
- hevc: properly handle no_rasl_output_flag when removing pictures from the DPB
- hevc: fix wpp threading deadlock.
- avcodec/ffv1: separate slice_count from max_slice_count
- lavf/img2dec: Fix memory leak
- avcodec/mp3: fix skipping zeros
- avformat/srtdec: make sure we probe a number
- avformat/srtdec: more lenient first line probing
- doc: mention libavcodec can decode Opus natively
- avcodec/ffv1enc: fix assertion failure with unset bits per raw sample
- MAINTAINERS: Remove myself as leader
- mips/hevcdsp: fix string concatenation on macros

I intend to also fix LP: #1509632, as the change (adding alternative libavcodec-ffmpeg-extra56 dependencies) has low regression potential and has been requested to be backported to wily.