install prefix            /home/fate/x86_64-openbsd5.6-gcc4.2-conf2/install
source path               /home/fate/src
C compiler                ccache gcc
C library                 
ARCH                      c (generic)
big-endian                no
runtime cpu detection     yes
debug symbols             no
strip symbols             yes
optimize for size         no
optimizations             yes
static                    yes
shared                    no
postprocessing support    yes
network support           yes
threading support         pthreads
safe bitstream reader     yes
texi2html enabled         no
perl enabled              yes
pod2man enabled           yes
makeinfo enabled          yes
makeinfo supports HTML    no
xmllint enabled           no

External libraries:
libxcb                  libxcb_xfixes           zlib
libxcb_shape            sndio
libxcb_shm              xlib

External libraries providing hardware acceleration:

Libraries:
avcodec                 avformat                swresample
avdevice                avutil                  swscale
avfilter                postproc

Programs:
ffmpeg                  ffprobe

Enabled decoders:
aac                     ffvhuff                 pfm
aac_fixed               ffwavesynth             pgm
aac_latm                fic                     pgmyuv
aasc                    fits                    pgssub
ac3                     flac                    pgx
ac3_fixed               flashsv                 photocd
acelp_kelvin            flashsv2                pictor
adpcm_4xm               flic                    pixlet
adpcm_adx               flv                     pjs
adpcm_afc               fmvc                    png
adpcm_agm               fourxm                  ppm
adpcm_aica              fraps                   prores
adpcm_argo              frwu                    prosumer
adpcm_ct                g2m                     psd
adpcm_dtk               g723_1                  ptx
adpcm_ea                g729                    qcelp
adpcm_ea_maxis_xa       gdv                     qdm2
adpcm_ea_r1             gem                     qdmc
adpcm_ea_r2             gif                     qdraw
adpcm_ea_r3             gremlin_dpcm            qoi
adpcm_ea_xas            gsm                     qpeg
adpcm_g722              gsm_ms                  qtrle
adpcm_g726              h261                    r10k
adpcm_g726le            h263                    r210
adpcm_ima_acorn         h263i                   ra_144
adpcm_ima_alp           h263p                   ra_288
adpcm_ima_amv           h264                    ralf
adpcm_ima_apc           hap                     rasc
adpcm_ima_apm           hca                     rawvideo
adpcm_ima_cunning       hcom                    realtext
adpcm_ima_dat4          hevc                    rl2
adpcm_ima_dk3           hnm4_video              roq
adpcm_ima_dk4           hq_hqa                  roq_dpcm
adpcm_ima_ea_eacs       hqx                     rpza
adpcm_ima_ea_sead       huffyuv                 rscc
adpcm_ima_iss           hymt                    rv10
adpcm_ima_moflex        iac                     rv20
adpcm_ima_mtf           idcin                   rv30
adpcm_ima_oki           idf                     rv40
adpcm_ima_qt            iff_ilbm                s302m
adpcm_ima_rad           ilbc                    sami
adpcm_ima_smjpeg        imc                     sanm
adpcm_ima_ssi           imm4                    sbc
adpcm_ima_wav           imm5                    scpr
adpcm_ima_ws            indeo2                  screenpresso
adpcm_ms                indeo3                  sdx2_dpcm
adpcm_mtaf              indeo4                  sga
adpcm_psx               indeo5                  sgi
adpcm_sbpro_2           interplay_acm           sgirle
adpcm_sbpro_3           interplay_dpcm          sheervideo
adpcm_sbpro_4           interplay_video         shorten
adpcm_swf               ipu                     simbiosis_imx
adpcm_thp               jacosub                 sipr
adpcm_thp_le            jpeg2000                siren
adpcm_vima              jpegls                  smackaud
adpcm_xa                jv                      smacker
adpcm_yamaha            kgv1                    smc
adpcm_zork              kmvc                    smvjpeg
agm                     lagarith                snow
aic                     loco                    sol_dpcm
alac                    lscr                    sonic
alias_pix               m101                    sp5x
als                     mace3                   speedhq
amrnb                   mace6                   speex
amrwb                   magicyuv                srgc
amv                     mdec                    srt
anm                     metasound               ssa
ansi                    microdvd                stl
ape                     mimic                   subrip
apng                    mjpeg                   subviewer
aptx                    mjpegb                  subviewer1
aptx_hd                 mlp                     sunrast
arbc                    mmvideo                 svq1
argo                    mobiclip                svq3
ass                     motionpixels            tak
asv1                    movtext                 targa
asv2                    mp1                     targa_y216
atrac1                  mp1float                tdsc
atrac3                  mp2                     text
atrac3al                mp2float                theora
atrac3p                 mp3                     thp
atrac3pal               mp3adu                  tiertexseqvideo
atrac9                  mp3adufloat             tiff
aura                    mp3float                tmv
aura2                   mp3on4                  truehd
av1                     mp3on4float             truemotion1
avrn                    mpc7                    truemotion2
avrp                    mpc8                    truemotion2rt
avs                     mpeg1video              truespeech
avui                    mpeg2video              tscc
ayuv                    mpeg4                   tscc2
bethsoftvid             mpegvideo               tta
bfi                     mpl2                    twinvq
bink                    msa1                    txd
binkaudio_dct           mscc                    ulti
binkaudio_rdft          msmpeg4v1               utvideo
bintext                 msmpeg4v2               v210
bitpacked               msmpeg4v3               v210x
bmp                     msnsiren                v308
bmv_audio               msp2                    v408
bmv_video               msrle                   v410
brender_pix             mss1                    vb
c93                     mss2                    vble
cavs                    msvideo1                vbn
ccaption                mszh                    vc1
cdgraphics              mts2                    vc1image
cdtoons                 mv30                    vcr1
cdxl                    mvc1                    vmdaudio
cfhd                    mvc2                    vmdvideo
cinepak                 mvdv                    vmnc
clearvideo              mvha                    vorbis
cljr                    mwsc                    vp3
cllc                    mxpeg                   vp4
comfortnoise            nellymoser              vp5
cook                    notchlc                 vp6
cpia                    nuv                     vp6a
cri                     on2avc                  vp6f
cscd                    opus                    vp7
cyuv                    paf_audio               vp8
dca                     paf_video               vp9
dds                     pam                     vplayer
derf_dpcm               pbm                     vqa
dfa                     pcm_alaw                wavpack
dfpwm                   pcm_bluray              wcmv
dirac                   pcm_dvd                 webp
dnxhd                   pcm_f16le               webvtt
dolby_e                 pcm_f24le               wmalossless
dpx                     pcm_f32be               wmapro
dsd_lsbf                pcm_f32le               wmav1
dsd_lsbf_planar         pcm_f64be               wmav2
dsd_msbf                pcm_f64le               wmavoice
dsd_msbf_planar         pcm_lxf                 wmv1
dsicinaudio             pcm_mulaw               wmv2
dsicinvideo             pcm_s16be               wmv3
dss_sp                  pcm_s16be_planar        wmv3image
dst                     pcm_s16le               wnv1
dvaudio                 pcm_s16le_planar        wrapped_avframe
dvbsub                  pcm_s24be               ws_snd1
dvdsub                  pcm_s24daud             xan_dpcm
dvvideo                 pcm_s24le               xan_wc3
dxa                     pcm_s24le_planar        xan_wc4
dxtory                  pcm_s32be               xbin
dxv                     pcm_s32le               xbm
eac3                    pcm_s32le_planar        xface
eacmv                   pcm_s64be               xl
eamad                   pcm_s64le               xma1
eatgq                   pcm_s8                  xma2
eatgv                   pcm_s8_planar           xpm
eatqi                   pcm_sga                 xsub
eightbps                pcm_u16be               xwd
eightsvx_exp            pcm_u16le               y41p
eightsvx_fib            pcm_u24be               ylc
escape124               pcm_u24le               yop
escape130               pcm_u32be               yuv4
evrc                    pcm_u32le               zero12v
exr                     pcm_u8                  zerocodec
fastaudio               pcm_vidc                zlib
ffv1                    pcx                     zmbv

Enabled encoders:
a64multi                h263p                   prores
a64multi5               huffyuv                 prores_aw
aac                     jpeg2000                prores_ks
ac3                     jpegls                  qoi
ac3_fixed               ljpeg                   qtrle
adpcm_adx               magicyuv                r10k
adpcm_argo              mjpeg                   r210
adpcm_g722              mlp                     ra_144
adpcm_g726              movtext                 rawvideo
adpcm_g726le            mp2                     roq
adpcm_ima_alp           mp2fixed                roq_dpcm
adpcm_ima_amv           mpeg1video              rpza
adpcm_ima_apm           mpeg2video              rv10
adpcm_ima_qt            mpeg4                   rv20
adpcm_ima_ssi           msmpeg4v2               s302m
adpcm_ima_wav           msmpeg4v3               sbc
adpcm_ima_ws            msvideo1                sgi
adpcm_ms                nellymoser              smc
adpcm_swf               opus                    snow
adpcm_yamaha            pam                     sonic
alac                    pbm                     sonic_ls
alias_pix               pcm_alaw                speedhq
amv                     pcm_bluray              srt
apng                    pcm_dvd                 ssa
aptx                    pcm_f32be               subrip
aptx_hd                 pcm_f32le               sunrast
ass                     pcm_f64be               svq1
asv1                    pcm_f64le               targa
asv2                    pcm_mulaw               text
avrp                    pcm_s16be               tiff
avui                    pcm_s16be_planar        truehd
ayuv                    pcm_s16le               tta
bitpacked               pcm_s16le_planar        ttml
bmp                     pcm_s24be               utvideo
cfhd                    pcm_s24daud             v210
cinepak                 pcm_s24le               v308
cljr                    pcm_s24le_planar        v408
comfortnoise            pcm_s32be               v410
dca                     pcm_s32le               vbn
dfpwm                   pcm_s32le_planar        vc2
dnxhd                   pcm_s64be               vorbis
dpx                     pcm_s64le               wavpack
dvbsub                  pcm_s8                  webvtt
dvdsub                  pcm_s8_planar           wmav1
dvvideo                 pcm_u16be               wmav2
eac3                    pcm_u16le               wmv1
exr                     pcm_u24be               wmv2
ffv1                    pcm_u24le               wrapped_avframe
ffvhuff                 pcm_u32be               xbm
fits                    pcm_u32le               xface
flac                    pcm_u8                  xsub
flashsv                 pcm_vidc                xwd
flashsv2                pcx                     y41p
flv                     pfm                     yuv4
g723_1                  pgm                     zlib
gif                     pgmyuv                  zmbv
h261                    png
h263                    ppm

Enabled hwaccels:

Enabled parsers:
aac                     dvbsub                  mpegvideo
aac_latm                dvd_nav                 opus
ac3                     dvdsub                  png
adx                     flac                    pnm
amr                     g723_1                  qoi
av1                     g729                    rv30
avs2                    gif                     rv40
avs3                    gsm                     sbc
bmp                     h261                    sipr
cavsvideo               h263                    tak
cook                    h264                    vc1
cri                     hevc                    vorbis
dca                     ipu                     vp3
dirac                   jpeg2000                vp8
dnxhd                   mjpeg                   vp9
dolby_e                 mlp                     webp
dpx                     mpeg4video              xbm
dvaudio                 mpegaudio               xma

Enabled demuxers:
aa                      ico                     pcm_f64le
aac                     idcin                   pcm_mulaw
aax                     idf                     pcm_s16be
ac3                     iff                     pcm_s16le
ace                     ifv                     pcm_s24be
acm                     ilbc                    pcm_s24le
act                     image2                  pcm_s32be
adf                     image2_alias_pix        pcm_s32le
adp                     image2_brender_pix      pcm_s8
ads                     image2pipe              pcm_u16be
adx                     image_bmp_pipe          pcm_u16le
aea                     image_cri_pipe          pcm_u24be
afc                     image_dds_pipe          pcm_u24le
aiff                    image_dpx_pipe          pcm_u32be
aix                     image_exr_pipe          pcm_u32le
alp                     image_gem_pipe          pcm_u8
amr                     image_gif_pipe          pcm_vidc
amrnb                   image_j2k_pipe          pjs
amrwb                   image_jpeg_pipe         pmp
anm                     image_jpegls_pipe       pp_bnk
apc                     image_jpegxl_pipe       pva
ape                     image_pam_pipe          pvf
apm                     image_pbm_pipe          qcp
apng                    image_pcx_pipe          r3d
aptx                    image_pgm_pipe          rawvideo
aptx_hd                 image_pgmyuv_pipe       realtext
aqtitle                 image_pgx_pipe          redspark
argo_asf                image_photocd_pipe      rl2
argo_brp                image_pictor_pipe       rm
argo_cvg                image_png_pipe          roq
asf                     image_ppm_pipe          rpl
asf_o                   image_psd_pipe          rsd
ass                     image_qdraw_pipe        rso
ast                     image_qoi_pipe          rtp
au                      image_sgi_pipe          rtsp
av1                     image_sunrast_pipe      s337m
avi                     image_svg_pipe          sami
avr                     image_tiff_pipe         sap
avs                     image_vbn_pipe          sbc
avs2                    image_webp_pipe         sbg
avs3                    image_xbm_pipe          scc
bethsoftvid             image_xpm_pipe          scd
bfi                     image_xwd_pipe          sdp
bfstm                   ingenient               sdr2
bink                    ipmovie                 sds
binka                   ipu                     sdx
bintext                 ircam                   segafilm
bit                     iss                     ser
bitpacked               iv8                     sga
bmv                     ivf                     shorten
boa                     ivr                     siff
brstm                   jacosub                 simbiosis_imx
c93                     jv                      sln
caf                     kux                     smacker
cavsvideo               kvag                    smjpeg
cdg                     live_flv                smush
cdxl                    lmlm4                   sol
cine                    loas                    sox
codec2                  lrc                     spdif
codec2raw               luodat                  srt
concat                  lvf                     stl
data                    lxf                     str
daud                    m4v                     subviewer
dcstr                   matroska                subviewer1
derf                    mca                     sup
dfa                     mcc                     svag
dfpwm                   mgsts                   svs
dhav                    microdvd                swf
dirac                   mjpeg                   tak
dnxhd                   mjpeg_2000              tedcaptions
dsf                     mlp                     thp
dsicin                  mlv                     threedostr
dss                     mm                      tiertexseq
dts                     mmf                     tmv
dtshd                   mods                    truehd
dv                      moflex                  tta
dvbsub                  mov                     tty
dvbtxt                  mp3                     txd
dxa                     mpc                     ty
ea                      mpc8                    v210
ea_cdata                mpegps                  v210x
eac3                    mpegts                  vag
epaf                    mpegtsraw               vc1
ffmetadata              mpegvideo               vc1t
filmstrip               mpjpeg                  vividas
fits                    mpl2                    vivo
flac                    mpsub                   vmd
flic                    msf                     vobsub
flv                     msnwc_tcp               voc
fourxm                  msp                     vpk
frm                     mtaf                    vplayer
fsb                     mtv                     vqf
fwse                    musx                    w64
g722                    mv                      wav
g723_1                  mvi                     wc3
g726                    mxf                     webm_dash_manifest
g726le                  mxg                     webvtt
g729                    nc                      wsaud
gdv                     nistsphere              wsd
genh                    nsp                     wsvqa
gif                     nsv                     wtv
gsm                     nut                     wv
gxf                     nuv                     wve
h261                    obu                     xa
h263                    ogg                     xbin
h264                    oma                     xmv
hca                     paf                     xvag
hcom                    pcm_alaw                xwma
hevc                    pcm_f32be               yop
hls                     pcm_f32le               yuv4mpegpipe
hnm                     pcm_f64be

Enabled muxers:
a64                     h263                    pcm_s16le
ac3                     h264                    pcm_s24be
adts                    hash                    pcm_s24le
adx                     hds                     pcm_s32be
aiff                    hevc                    pcm_s32le
alp                     hls                     pcm_s8
amr                     ico                     pcm_u16be
amv                     ilbc                    pcm_u16le
apm                     image2                  pcm_u24be
apng                    image2pipe              pcm_u24le
aptx                    ipod                    pcm_u32be
aptx_hd                 ircam                   pcm_u32le
argo_asf                ismv                    pcm_u8
argo_cvg                ivf                     pcm_vidc
asf                     jacosub                 psp
asf_stream              kvag                    rawvideo
ass                     latm                    rm
ast                     lrc                     roq
au                      m4v                     rso
avi                     matroska                rtp
avif                    matroska_audio          rtp_mpegts
avm2                    md5                     rtsp
avs2                    microdvd                sap
avs3                    mjpeg                   sbc
bit                     mkvtimestamp_v2         scc
caf                     mlp                     segafilm
cavsvideo               mmf                     segment
codec2                  mov                     smjpeg
codec2raw               mp2                     smoothstreaming
crc                     mp3                     sox
dash                    mp4                     spdif
data                    mpeg1system             spx
daud                    mpeg1vcd                srt
dfpwm                   mpeg1video              stream_segment
dirac                   mpeg2dvd                streamhash
dnxhd                   mpeg2svcd               sup
dts                     mpeg2video              swf
dv                      mpeg2vob                tee
eac3                    mpegts                  tg2
f4v                     mpjpeg                  tgp
ffmetadata              mxf                     truehd
fifo                    mxf_d10                 tta
fifo_test               mxf_opatom              ttml
filmstrip               null                    uncodedframecrc
fits                    nut                     vc1
flac                    obu                     vc1t
flv                     oga                     voc
framecrc                ogg                     w64
framehash               ogv                     wav
framemd5                oma                     webm
g722                    opus                    webm_chunk
g723_1                  pcm_alaw                webm_dash_manifest
g726                    pcm_f32be               webp
g726le                  pcm_f32le               webvtt
gif                     pcm_f64be               wsaud
gsm                     pcm_f64le               wtv
gxf                     pcm_mulaw               wv
h261                    pcm_s16be               yuv4mpegpipe

Enabled protocols:
async                   hls                     rtmpt
cache                   http                    rtp
concat                  httpproxy               srtp
concatf                 icecast                 subfile
crypto                  md5                     tcp
data                    mmsh                    tee
ffrtmphttp              mmst                    udp
file                    pipe                    udplite
ftp                     prompeg                 unix
gopher                  rtmp

Enabled filters:
abench                  crystalizer             null
abitscope               cue                     nullsink
acompressor             curves                  nullsrc
acontrast               datascope               oscilloscope
acopy                   dblur                   overlay
acrossfade              dcshift                 owdenoise
acrossover              dctdnoiz                pad
acrusher                deband                  pal100bars
acue                    deblock                 pal75bars
addroi                  decimate                palettegen
adeclick                deconvolve              paletteuse
adeclip                 dedot                   pan
adecorrelate            deesser                 perms
adelay                  deflate                 perspective
adenorm                 deflicker               phase
aderivative             dejudder                photosensitivity
adrawgraph              delogo                  pixdesctest
adynamicequalizer       derain                  pixelize
adynamicsmooth          deshake                 pixscope
aecho                   despill                 pp
aemphasis               detelecine              pp7
aeval                   dialoguenhance          premultiply
aevalsrc                dilation                prewitt
aexciter                displace                pseudocolor
afade                   dnn_classify            psnr
afftdn                  dnn_detect              pullup
afftfilt                dnn_processing          qp
afifo                   doubleweave             random
afir                    drawbox                 readeia608
afirsrc                 drawgraph               readvitc
aformat                 drawgrid                realtime
afreqshift              drmeter                 remap
afwtdn                  dynaudnorm              removegrain
agate                   earwax                  removelogo
agraphmonitor           ebur128                 repeatfields
ahistogram              edgedetect              replaygain
aiir                    elbg                    reverse
aintegral               entropy                 rgbashift
ainterleave             epx                     rgbtestsrc
alatency                eq                      roberts
alimiter                equalizer               rotate
allpass                 erosion                 sab
allrgb                  estdif                  scale
allyuv                  exposure                scale2ref
aloop                   extractplanes           scdet
alphaextract            extrastereo             scharr
alphamerge              fade                    scroll
amerge                  feedback                segment
ametadata               fftdnoiz                select
amix                    fftfilt                 selectivecolor
amovie                  field                   sendcmd
amplify                 fieldhint               separatefields
amultiply               fieldmatch              setdar
anequalizer             fieldorder              setfield
anlmdn                  fifo                    setparams
anlmf                   fillborders             setpts
anlms                   find_rect               setrange
anoisesrc               firequalizer            setsar
anull                   flanger                 settb
anullsink               floodfill               shear
anullsrc                format                  showcqt
apad                    fps                     showfreqs
aperms                  framepack               showinfo
aphasemeter             framerate               showpalette
aphaser                 framestep               showspatial
aphaseshift             freezedetect            showspectrum
apsyclip                freezeframes            showspectrumpic
apulsator               fspp                    showvolume
arealtime               gblur                   showwaves
aresample               geq                     showwavespic
areverse                gradfun                 shuffleframes
arnndn                  gradients               shufflepixels
asdr                    graphmonitor            shuffleplanes
asegment                grayworld               sidechaincompress
aselect                 greyedge                sidechaingate
asendcmd                guided                  sidedata
asetnsamples            haas                    sierpinski
asetpts                 haldclut                signalstats
asetrate                haldclutsrc             signature
asettb                  hdcd                    silencedetect
ashowinfo               headphone               silenceremove
asidedata               hflip                   sinc
asoftclip               highpass                sine
aspectralstats          highshelf               siti
asplit                  hilbert                 smartblur
astats                  histeq                  smptebars
astreamselect           histogram               smptehdbars
asubboost               hqdn3d                  sobel
asubcut                 hqx                     spectrumsynth
asupercut               hstack                  speechnorm
asuperpass              hsvhold                 split
asuperstop              hsvkey                  spp
atadenoise              hue                     sr
atempo                  huesaturation           ssim
atilt                   hwdownload              stereo3d
atrim                   hwmap                   stereotools
avectorscope            hwupload                stereowiden
avgblur                 hysteresis              streamselect
avsynctest              identity                super2xsai
axcorrelate             idet                    superequalizer
bandpass                il                      surround
bandreject              inflate                 swaprect
bass                    interlace               swapuv
bbox                    interleave              tblend
bench                   join                    telecine
bilateral               kerndeint               testsrc
biquad                  kirsch                  testsrc2
bitplanenoise           lagfun                  thistogram
blackdetect             latency                 threshold
blackframe              lenscorrection          thumbnail
blend                   life                    tile
blockdetect             limitdiff               tiltshelf
blurdetect              limiter                 tinterlace
bm3d                    loop                    tlut2
boxblur                 loudnorm                tmedian
bwdif                   lowpass                 tmidequalizer
cas                     lowshelf                tmix
cellauto                lumakey                 tonemap
channelmap              lut                     tpad
channelsplit            lut1d                   transpose
chorus                  lut2                    treble
chromahold              lut3d                   tremolo
chromakey               lutrgb                  trim
chromanr                lutyuv                  unpremultiply
chromashift             mandelbrot              unsharp
ciescope                maskedclamp             untile
codecview               maskedmax               v360
color                   maskedmerge             vaguedenoiser
colorbalance            maskedmin               varblur
colorchannelmixer       maskedthreshold         vectorscope
colorchart              maskfun                 vflip
colorcontrast           mcompand                vfrdet
colorcorrect            median                  vibrance
colorhold               mergeplanes             vibrato
colorize                mestimate               vif
colorkey                metadata                vignette
colorlevels             midequalizer            vmafmotion
colormap                minterpolate            volume
colormatrix             mix                     volumedetect
colorspace              monochrome              vstack
colorspectrum           morpho                  w3fdif
colortemperature        movie                   waveform
compand                 mpdecimate              weave
compensationdelay       mptestsrc               xbr
concat                  msad                    xcorrelate
convolution             multiply                xfade
convolve                negate                  xmedian
copy                    nlmeans                 xstack
cover_rect              nnedi                   yadif
crop                    noformat                yaepblur
cropdetect              noise                   yuvtestsrc
crossfeed               normalize               zoompan

Enabled bsfs:
aac_adtstoasc           h264_redundant_pps      opus_metadata
av1_frame_merge         hapqa_extract           pcm_rechunk
av1_frame_split         hevc_metadata           pgs_frame_merge
av1_metadata            hevc_mp4toannexb        prores_metadata
chomp                   imx_dump_header         remove_extradata
dca_core                mjpeg2jpeg              setts
dump_extradata          mjpega_dump_header      text2movsub
dv_error_marker         mov2textsub             trace_headers
eac3_core               mp3_header_decompress   truehd_core
extract_extradata       mpeg2_metadata          vp9_metadata
filter_units            mpeg4_unpack_bframes    vp9_raw_reorder
h264_metadata           noise                   vp9_superframe
h264_mp4toannexb        null                    vp9_superframe_split

Enabled indevs:
bktr                    sndio                   xcbgrab
lavfi                   v4l2

Enabled outdevs:
sndio                   v4l2                    xv

License: GPL version 2 or later

WARNING: gcc 4.2 is outdated and may miscompile FFmpeg. Please use a newer compiler.