Log Message:
ffmpeg3 ffplay3: updated to 3.4.11

version 3.4.11:
 avfilter/vf_colorspace: fix memmory leaks
 avcodec/ac3enc: Fix memleak
 avformat/nutenc: don't allocate a dynamic AVIOContext if no index is going to \ 
be written
 avfilter/vf_random: fix memory leaks
 avfilter/vf_bwdif: fix heap-buffer overflow
 fftools/ffmpeg_opt: Fix leak of options when parsing options fails
 avfilter/vf_edgedetect: fix heap-buffer overflow
 avfilter/vf_w3fdif: deny processing small videos
 avfilter/vf_avgblur: fix heap-buffer overflow
 avfilter/af_tremolo: fix heap-buffer overflow
 avfilter/vf_edgedetect: check if height is big enough
 avfilter/vf_bitplanenoise: fix overreads
 avfilter/vf_fieldorder: fix heap-buffer overflow
 avfilter/vf_fieldmatch: fix heap-buffer overflow
 aformat/movenc: add missing padding to output track extradata
 avcodec/pngenc: remove monowhite from apng formats

version 3.4.10:
 avfilter/vf_lenscorrection: make width/height int
 avcodec/diracdec: avoid signed integer overflow in global mv
 avcodec/takdsp: Fix integer overflow in decorrelate_sf()
 avcodec/apedec: fix a integer overflow in long_filter_high_3800()
 avfilter/vf_subtitles: pass storage size to libass
 avformat/aqtitledec: Skip unrepresentable durations
 avformat/cafdec: Do not store empty keys in read_info_chunk()
 avformat/hls: Check target_duration
 avcodec/pixlet: Avoid signed integer overflow in scaling in filterfn()
 avformat/matroskadec: Check pre_ns
 avcodec/sonic: Use unsigned for predictor_k to avoid undefined behavior
 avformat/matroskadec: Use rounded down duration in get_cue_desc() check
 avformat/avidec: Check height
 avformat/rmdec: Better duplicate tags check
 avformat/mov: Disallow empty sidx
 avformat/matroskadec: Check duration
 avcodec/jpeglsdec: Fix if( code style
 avcodec/jpeglsdec: Check get_ur_golomb_jpegls() for error
 avcodec/motion_est: fix indention of ff_get_best_fcode()
 avcodec/motion_est: Fix xy indexing on range violation in ff_get_best_fcode()
 avcodec/jpeglsdec: Increase range for N in ls_get_code_runterm() by using unsigned
 avformat/matroskadec: Check desc_bytes
 avformat/utils: Fix invalid NULL pointer operation in ff_parse_key_value()
 avformat/matroskadec: Fix infinite loop with bz decompression
 avformat/mov: Check size before subtraction
 avcodec/apedec: Fix integer overflows in predictor_update_3930()
 avcodec/apedec: fix integer overflow in 8bit samples
 avformat/flvdec: timestamps cannot use the full int64 range
 avcodec/vqavideo: reset accounting on error
 avcodec/alacdsp: fix integer overflow in decorrelate_stereo()
 avformat/4xm: Check for duplicate track ids
 avformat/4xm: Consider max_streams on reallocating tracks array
 avformat/mov: Check next offset in mov_read_dref()
 avformat/mxfdec: Check for duplicate mxf_read_index_entry_array()
 avcodec/apedec: Change avg to uint32_t
 avformat/mov: Disallow duplicate smdm
 avformat/mov: Check for EOF in mov_read_glbl()
 avformat/mov: Check channels for mov_parse_stsd_audio()
 avformat/avidec: Check read_odml_index() for failure
 avformat/aiffdec: Use av_rescale() for bitrate
 avformat/aiffdec: sanity check block_align
 avformat/aiffdec: Check sample_rate
 avfilter/vf_gblur: fix heap-buffer overflow
 avfilter/vf_lenscorrection: fix division by zero
 avformat/latmenc: abort if no extradata is available
 avcodec/g729dec: Avoid computing invalid temporary pointers for \ 
ff_acelp_weighted_vector_sum()
 avformat/movenc: Fix segfault when remuxing rtp hint stream
 avformat/tty: add probe function
 avcodec/flac_parser: Consider AV_INPUT_BUFFER_PADDING_SIZE
 avcodec/ttadsp: Fix integer overflows in tta_filter_process_c()
 avutil/mathematics: Document av_rescale_rnd() behavior on non int64 results
 configure: Add missing libshine->mpegaudioheader dependency

version 3.4.9:
 avformat/wavdec: Check smv_block_size
 avformat/rmdec: Check for multiple audio_stream_info
 avcodec/apedec: Use 64bit to avoid overflow
 avcodec/apedec: Fix undefined integer overflow in long_filter_ehigh_3830()
 oavformat/avidec: Check offset in odml
 avformat/mpegts: use actually read packet size in mpegts_resync special case
 swscale/alphablend: Fix slice handling
 avcodec/mxpegdec: Check for AVDISCARD_ALL
 avcodec/flicvideo: Check remaining bytes in FLI*COPY
 avcodec/mpeg12dec: Do not put mpeg_f_code into an invalid state on error return
 avcodec/mpegvideo_enc: Limit bitrate tolerance to the representable
 avcodec/apedec: Fix integer overflow in intermediate
 avformat/mvdec: Do not set invalid sample rate
 avformat/rmdec: Use 64bit for intermediate for DEINT_ID_INT4
 avformat/jacosubdec: Check for min in t overflow in get_shift()
 avformat/mxfdec: check channel number in mxf_get_d10_aes3_packet()
 avfilter/scale_npp: fix non-aligned output frame dimensions
 avcodec/utils: don't return negative values in av_get_audio_frame_duration()
 avcodec/jpeg2000dec: Check that atom header is within bytsetream
 avcodec/apedec: Fix 2 integer overflows in filter_3800()
 avcodec/xpmdec: Move allocations down after more error checks
 network: Define ENOTCONN as WSAENOTCONN if not defined
 avformat/avidec: Use 64bit for frame number in odml index parsing
 avcodec/mjpegdec: Check for bits left in mjpeg_decode_scan_progressive_ac()
 avformat/adtsenc: return value check for init_get_bits in adts_decode_extradata
 avcodec/webp: Check available space in loop in decode_entropy_coded_image()
 avcodec/vc1dec: ff_print_debug_info() does not support WMV3 field_mode
 avcodec/frame_thread_encoder: Free AVCodecContext structure on error during init
 avcodec/faxcompr: Check for end of input in cmode == 1 in decode_group3_2d_line()
 avcodec/vc1dec: Disable error concealment for *IMAGE
 avcodec/sbrdsp_fixed: Fix negation overflow in sbr_neg_odd_64_c()
 avformat/wtvdec: Check for EOF before seeking back in parse_media_type()
 avformat/wavdec: Use 64bit in new_pos computation
 avformat/sbgdec: Check for overflow in timestamp preparation
 avformat/dsicin: Check packet size for overflow
 avformat/bfi: check nframes
 avformat/avidec: fix position overflow in avi_load_index()
 avformat/asfdec_f: Check sizeX against padding
 avformat/aiffdec: Check for size overflow in header parsing
 avcodec/aaccoder: Add minimal bias in search_for_ms()
 avfilter/vf_mestimate: Check b_count
 avformat/mov: do not ignore errors in mov_metadata_hmmt()
 avformat/mxfdec: Check size for shrinking
 avcodec/dnxhddec: check and propagate function return value
 swscale/slice: Fix wrong return on error
 swscale/slice: Check slice for allocation failure
 configure: Fix sem_timedwait probe
 configure: add missing pthreads dependency to v4l2_m2m
 avformat/matroskadec: Fix handling of huge default durations
 avcodec/lpc: check for zero err in normalization in compute_lpc_coefs()
 avformat/ftp: Check for av_strtok() failure
 tools/cws2fws: Check read() for failure
 avcodec/cpia: Fix missing src_size update
 avcodec/utils: Use 64bit for intermediate in AV_CODEC_ID_ADPCM_THP* duration \ 
calculation
 avformat/rmdec: Check old_format len for overflow
 avformat/realtextdec: Check the pts difference before using it for the duration \ 
computation
 avformat/qcp: Avoid negative nb_rates
 avformat/nutdec: Check tmp_size
 avformat/msf: Check that channels doesnt overflow during extradata construction
 avformat/mpc8: Check for position overflow in mpc8_handle_chunk()
 avformat/iff: Use 64bit in duration computation
 avformat/dxa: Check fps to be within the supported range more precissely
 avcodec/iff: Only write palette to plane 1 if its PAL8
 avformat/tta: Check for EOF in index reading loop
 Update missed irc links
 avformat/rpl: The associative law doesnt hold for signed integers in C
 avcodec/faxcompr: Check available bits in decode_uncompressed()
 avcodec/faxcompr: Check if bits are available before reading in cmode == 9 || \ 
cmode == 10
 avcodec/utils: do "calc from frame_bytes, channels, and block_align" \ 
in 64bit
 avcodec/ttadata: Add sentinel at the end of ff_tta_shift_1
 avfilter/vf_dctdnoiz: Check threads
 avfilter/vf_ciescope: Fix undefined behavior in rgb_to_xy() with black
 avformat/rpl: Check for EOF and zero framesize
 avcodec/vc2enc: Check for non negative slice bounds
 avformat/rpl: Use 64bit in bitrate computation and check it
 avcodec/svq1enc: Do not print debug RD value before it has been computed
 avcodec/aacpsy: Check bandwidth
 avcodec/aacenc: Do not divide by lambda_count if it is 0
 avcodec/aacenc: Use FLT_EPSILON for lambda minimum
 avformat/cinedec: Fix index_entries size check
 avfilter/vf_yadif: Fix handing of tiny images
 avfilter/vf_vmafmotion: Check dimensions
 avformat/movenc: Check pal_size before use
 avcodec/lpc: Avoid floating point division by 0
 avcodec/aacpsy: Avoid floating point division by 0 of norm_fac
 avcodec/aacenc: Avoid 0 lambda
 avcodec/exr: x/ymax cannot be INT_MAX
 avformat/avio: Check av_opt_copy() for failure
 avcodec/vc1: Check remaining bits in ff_vc1_parse_frame_header()
 avformat/mov: Ignore duplicate CoLL
 avformat/mov: Limit nb_chapter_tracks to input size
 avformat/utils: Use 64bit earlier in r_frame_rate check
 avformat/mvdec: Check sample rate in parse_audio_var()
 avcodec/faxcompr: Check for end of bitstream in decode_group3_1d_line() and \ 
decode_group3_2d_line()
 avcodec/utils: treat PAL8 for jpegs similar to other colorspaces
 avcodec/jpeglsdec: Set alpha plane in PAL8 so image is not 100% transparent
 avformat/asfdec_o: Use ff_get_extradata()
 avformat/id3v2: Check end for overflow in id3v2_parse()
 avformat/wtvdec: Improve size overflow checks in parse_chunks()
 avcodec/faxcompr: Check remaining bits on error in decode_group3_1d_line()
 avcodec/utils: Check ima wav duration for overflow
 avformat/cafdec: Check channels
 avcodec/dpx: Check bits_per_color earlier
 avcodec/pnm_parser: Check image size addition for overflow
 avformat/rmdec: use larger intermediate type for audio_framesize * sub_packet_h \ 
check
 avcodec/h264_slice: Check input SPS in ff_h264_update_thread_context()
 avcodec/mpegvideo: Update chroma_?_shift in ff_mpv_common_frame_size_change()
 avformat/mov: Ignore multiple STSC / STCO
 avformat/utils: Extend overflow check in dts wrap in compute_pkt_fields()
 avfilter/vf_scale: Fix adding 0 to NULL (which is UB) in scale_slice()
 avutil/common: Add FF_PTR_ADD()
 avformat/wtvdec: Check size in SBE2_STREAM_DESC_EVENT / stream2_guid
 avformat/cafdec: Do not build an index if all packets are the same
 avcodec/sonic: Use unsigned temporary in predictor_calc_error()
 avformat/flvdec: Check array entry number
 avcodec/h264_slice: Check sps in h264_slice_header_init()
 avformat/movenc: Avoid loosing cluster array on failure
 avformat/avidec: Check for dv streams before using priv_data in parse ##dc/##wb
 avformat/mov: Check sample size for overflow in mov_parse_stsd_audio()
 avcodec/ffwavesynth: Avoid signed integer overflow in phi_at()
 avcodec/mpeg4videoenc: Check extradata malloc()
 avcodec/speedhq: Width < 8 is not supported
 avformat/matroskadec: Check for EOF in resync loop
 avcodec/utils: Use more bits for intermediate for AV_CODEC_ID_ADPCM_MS
 avcodec/jpegls: Check A[Q] for overflow in ff_jpegls_update_state_regular()
 avformat/voc_packet: prevent remaining size from becoming negative in \ 
ff_voc_get_packet()
 avutil/timecode: Avoid fps overflow
 avformat/mvi: Check audio size for more overflows
 avcodec/flacdec: Avoid undefined shift in error case
 avcodec/ffv1dec: Check if trailer is available
 avcodec/4xm: Check pre_gb in decode_i_block()
 avcodec/dcadsp: Fix integer overflow in dmix_add_c()
 avformat/flvdec: Check double before cast in parse_keyframes_index()
 avformat/paf: Check for EOF before allocation in read_header()
 avcodec/aacdec_template: Avoid undefined negation in imdct_and_windowing_eld()
 avformat/lxfdec: Fix multiple integer overflows related to track_size
 avcodec/exr: skip bottom clearing loop when its outside the image
 avformat/aiffdec: Check that SSND is at least 8 bytes
 avformat/dcstr: Check sample rate
 avcodec/alsdec: Check bitstream input in read_block()
 avformat/mov: Extend data_size check in mov_read_udta_string()
 avformat/voc_packet: Add a basic check on max_size
 avformat/microdvddec: use 64bit for durations
 avcodec/hapdec: Change compressed_offset to unsigned 32bit
 avformat/rmdec: Check codec_length without overflow
 avformat/mov: Check element count in mov_metadata_hmmt()
 avcodec/fits: Check gcount and pcount being non negative
 avformat/nutdec: Check timebase count against main header length
 avformat/electronicarts: Clear partial_packet on error
 avformat/r3d: Check samples before computing duration
 avcodec/pnm_parser: Check av_image_get_buffer_size() for failure
 avformat/wavdec: Consider AV_INPUT_BUFFER_PADDING_SIZE in set_spdif()
 avformat/rmdec: Check remaining space in debug av_log() loop
 avformat/flvdec: Treat high ts byte as unsigned
 avformat/samidec: Sanity check pts
 avformat/avidec: Use 64bit in get_duration()
 avformat/mov: Check for duplicate st3d
 avformat/mvdec: Check for EOF in read_index()
 avcodec/jpeglsdec: Fix k=16 in ls_get_code_regular()
 avformat/id3v2: Check the return from avio_get_str()
 avcodec/hevc_sei: Check payload size in decode_nal_sei_message()
 libavutil/eval: Remove CONFIG_TRAPV special handling
 avformat/wtvdec: Check len in parse_chunks() to avoid overflow
 avformat/asfdec_f: Add an additional check for the extradata size
 avformat/3dostr: Check sample_rate
 avformat/4xm: Make audio_frame_count 64bit
 avformat/mov: Use av_mul_q() to avoid integer overflows
 avcodec/vp9dsp_template: Fix integer overflows in itxfm_wrapper
 avformat/rmdec: Reorder operations to avoid overflow
 avcodec/mxpegdec: fix SOF counting
 avcodec/rscc: Check inflated_buf size whan it is used
 avformat/mvdec: Sanity check SAMPLE_WIDTH
 avformat/rmdec: Fix codecdata_length overflow check
 avcodec/simple_idct: Fix undefined integer overflow in idct4row()
 avformat/tta: Use 64bit intermediate for index
 avformat/soxdec: Check channels to be positive
 avcodec/vp3: Check input amount in theora_decode_header()
 avformat/wavdec: Check avio_get_str16le() for failure
 avformat/flvdec: Check for EOF in amf_skip_tag()
 avformat/aiffdec: Check size before subtraction in get_aiff_header()
 avformat/electronicarts: More chunk_size checks
 avformat/tedcaptionsdec: Check for overflow in parse_int()
 avformat/nuv: Check channels
 avformat/mpc8: Check size before implicitly converting to int
 avformat/nutdec: Fix integer overflow in count computation
 avformat/mvi: Use 64bit for testing dimensions
 avformat/utils: Check dts in update_initial_timestamps() more
 avformat/flvdec: Check for avio_read() failure in amf_get_string()
 avformat/flvdec: Check for nesting depth in amf_skip_tag()
 avformat/flvdec: Check for nesting depth in amf_parse_object()
 avformat/asfdec_o: Check for EOF in asf_read_marker()
 avformat/utils: Check dts - (1<<pts_wrap_bits) overflow
 avformat/bfi: Check chunk_header
 avformat/ads: Check size
 avformat/iff: Check block align also for ID_MAUD
 avcodec/utils: Check for integer overflow in get_audio_frame_duration() for \ 
ADPCM_DTK
 avformat/fitsdec: Better size checks
 avformat/mxfdec: Fix integer overflow in next position in mxf_read_local_tags()
 avformat/avidec: dv does not support palettes
 libavformat/utils: consider avio_size() failure in ffio_limit()
 avformat/nistspheredec: Check bits_per_coded_sample and channels
 avformat/asfdec_o: Check size vs. offset in detect_unknown_subobject()
 avformat/utils: check for integer overflow in av_get_frame_filename2()
 avutil/timecode: Avoid undefined behavior with large framenum
 avformat/sbgdec: Reduce the amount of floating point in str_to_time()
 avformat/mxfdec: Free all types for both Descriptors
 uavformat/rsd: check for EOF in extradata
 avcodec/wmaprodec: Check packet size
 avcodec/alsdec: Fix integer overflow with quant_cof
 avformat/mpegts: Fix argument type for av_log
 avformat/cafdec: clip sample rate
 avcodec/ffv1dec: Fix off by 1 error with quant tables
 avformat/mpegts: Increase pcr_incr width to 64bit
 avcodec/utils: Check bitrate for overflow in get_bit_rate()
 avformat/mov: Check if hoov is at the end
 avcodec/hevc_ps: check scaling_list_dc_coef
 avformat/iff: Check data_size
 avformat/matroskadec: Sanity check codec_id/track type
 avformat/rpl: Check the number of streams
 avcodec/h264idct_template: Fix integer overflow in \ 
ff_h264_chroma422_dc_dequant_idct()
 avformat/dsfdec: Check block_align more completely
 avformat/mpc8: Check remaining space in mpc8_parse_seektable()
 avformat/id3v2: Sanity check tlen before alloc and uncompress
 avformat/vqf: Check len for COMM chunks
 avcodec/hevc_cabac: Limit value in coeff_abs_level_remaining_decode() tighter
 avformat/cafdec: Check the return code from av_add_index_entry()
 avformat/cafdec: Check for EOF in index read loop
 avformat/cafdec: Check that bytes_per_packet and frames_per_packet are non negative
 avformat/mpc8: correct integer overflow in mpc8_parse_seektable()
 avformat/mpc8: correct 32bit timestamp truncation
 avcodec/exr: Check ymin vs. h
 avformat/avs: Use 64bit for the avio_tell() output
 avformat/wavdec: More complete size check in find_guid()
 avformat/iff: Check size before skip
 avformat/rmdec: Check for EOF in index packet reading
 avformat/icodec: Check for zero streams and stream creation failure
 avformat/icodec: Factor failure code out in read_header()
 avformat/bintext: Check width
 avformat/sbgdec: Check that end is not before start
 avformat/lvfdec: Check stream_index before use
 avformat/au: cleanup on EOF return in au_read_annotation()
 avformat/mpegts: Limit copied data to space
 avformat/bintext: Check width in idf_read_header()
 avformat/iff: check size against INT64_MAX
 avformat/paf: Check for EOF in read_table()
 avformat/gxf: Check pkt_len
 avformat/aiffdec: Check packet size
 avformat/concatdec: use av_strstart()
 avformat/wavdec: Refuse to read chunks bigger than the filesize in w64_read_header()
 avformat/rsd: Check size and start before computing duration
 avformat/iff: More completely check body_size
 avformat/xwma: Check for EOF in dpds_table read code
 avcodec/utils: Check sample rate before use for AV_CODEC_ID_BINKAUDIO_DCT in \ 
get_audio_frame_duration()
 avcodec/dirac_parser: do not offset AV_NOPTS_OFFSET
 avformat/rmdec: Make expected_len 64bit
 avformat/lrcdec: Clip timestamps
 avformat/electronicarts: Check for EOF in each iteration of the loop in \ 
ea_read_packet()
 avcodec/vp9dsp_template: Fix some overflows in iadst8_1d()
 avcodec/fits: Check bscale
 avformat/nistspheredec: Check bps
 avformat/jacosubdec: Use 64bit inside get_shift()
 avformat/genh: Check block_align
 avformat/mvi: Check count for overflow
 avcodec/magicyuv: Check slice size before reading flags and pred
 avformat/asfdec_f: Check for negative ext_len
 avformat/bethsoftvid: Check image dimensions before use
 avformat/genh: Check block_align for how it will be used in SDX2_DPCM
 avformat/au: Check for EOF in au_read_annotation()
 avformat/segafilm: Do not assume AV_CODEC_ID_NONE is 0
 avformat/segafilm: Check that there is a stream
 avformat/wtvdec: Check dir_length
 avcodec/exr: Check limits to avoid overflow in delta computation
 avformat/boadec: Check that channels and block_align are set
 avformat/asfdec_f: Check name_len for overflow
 avcodec/h264idct_template: Fix integer overflow in \ 
ff_h264_chroma422_dc_dequant_idct()
 avcodec/aacdec_fixed: Limit index in vector_pow43()
 avformat/rmdec: sanity check coded_framesize
 avformat/flvdec: Check for EOF in amf_parse_object()
 avcodec/smacker: Check remaining bits in SMK_BLK_FULL
 avcodec/cook: Check subpacket index against max
 avcodec/hevcpred_template: Fix diagonal chroma availability in 4:2:2 edge case \ 
in intra_pred
 avformat/icodec: Change order of operations to avoid NULL dereference
 avcodec/exr: Fix overflow with many blocks
 avcodec/vp9dsp_template: Fix integer overflows in idct16_1d()
 avcodec/ansi: Check initial dimensions
 avcodec/hevcdec: Check slice_cb_qp_offset / slice_cr_qp_offset
 avcodec/sonic: Check for overread
 avformat/subviewerdec: fail on AV_NOPTS_VALUE
 avcodec/exr: Check line size for overflow
 avcodec/exr: Check xdelta, ydelta
 avcodec/celp_filters: Avoid invalid negation in ff_celp_lp_synthesis_filter()
 avcodec/takdsp: Fix negative shift in decorrelate_sf()
 avcodec/dxtory: Fix negative stride shift in dx2_decode_slice_420()
 avformat/asfdec_f: Change order or operations slightly
 avformat/dxa: Use av_rescale() for duration computation
 avcodec/vc1_block: Fix integer overflow in ac value
 avformat/iff: Check data_size not overflowing int64
 avcodec/dxtory: Fix negative shift in dx2_decode_slice_410()
 avcodec/sonic: Check channels before deallocating
 avcodec/ansi: Check nb_args for overflow
 avcodec/diracdsp: Fix integer anomaly in dequant_subband_*
 avutil/fixed_dsp: Fix integer overflows in butterflies_fixed_c()
 avcodec/wmalosslessdec: Check remaining space before padding and channel residue
 avformat/cdg: Fix integer overflow in duration computation
 avcodec/mpc: Fix multiple numerical overflows in ff_mpc_dequantize_and_synth()
 avformat/electronicarts: Check if there are any streams
 avcodec/ffwavesynth: Fix integer overflow in wavesynth_synth_sample / WS_SINE
 avcodec/vp9dsp_template: Fix integer overflow in iadst8_1d()
 avformat/avidec: Fix io_fsize overflow
 avcodec/cfhd: Check transform type
 avcodec/tiff: Restrict tag order based on specification
 avformat/siff: Reject audio packets without audio stream
 avformat/mpeg: Check avio_read() return value in get_pts()
 avcodec/tiff: Check bpp/bppcount for 0
 avcodec/snowdec: Sanity check hcoeff
 avformat/mov: Check comp_brand_size
 avcodec/alac: Check decorr_shift to avoid invalid shift
 avcodec/tdsc: Fix tile checks
 avformat/mm: Check for existence of audio stream
 avformat/mov: Fix unaligned read of uint32_t and endian-dependance in \ 
mov_read_default
 avcodec/apedec: Fix undefined integer overflow with 24bit
 avcodec/loco: Fix integer overflow with large values from loco_get_rice()
 avformat/smjpegdec: Check the existence of referred streams
 avcodec/pnmdec: Fix misaligned reads
 avcodec/cuviddec: backport extradata fixes
 avcodec/cuviddec: handle arbitrarily sized extradata
 avformat/tls_schannel: immediately return decrypted data if available
 avformat/tls_schannel: always decrypt all received data
 avformat/tls_schannel: Fix use of uninitialized variable