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  • Curator of the Samples Archive

    13 mai 2011, par Multimedia Mike — General

    Remember how I mirrored the world-famous MPlayerHQ samples archive a few months ago ? Due to a series of events, the original archive is no longer online. However, me and the people who control the mplayerhq.hu domain figured out how to make samples.mplayerhq.hu point to samples.multimedia.cx.

    That means... I’m the current owner and curator of our central multimedia samples repository. Such power ! This should probably be the fulfillment of a decade-long dream for me, having managed swaths of the archive, most notably the game formats section.

    How This Came To Be

    If you pay any attention to the open source multimedia scene, you might have noticed that there has been a smidge of turmoil. Heated words were exchanged, authority was questioned, some people probably said some things they didn’t mean, and the upshot is that, where once there was one project (FFmpeg), there are now 2 projects (also Libav). And to everyone who has wanted me to mention it on my blog— there, I finally broke my silence and formally acknowledged the schism.

    For my part, I was just determined to ensure that the samples archive remained online, preferably at the original samples.mplayerhq.hu address. There are 10 years worth of web links out there pointing into the original repository.

    Better Solution

    I concede that it’s not entirely optimal to host the repository here at multimedia.cx. While I can offer a crazy amount of monthly bandwidth, I can’t offer rsync (invaluable for keeping mirrors in sync), nor can the server provide anonymous FTP or allow me to offer accounts to other admins who can manage the repository.

    The samples archive is also mirrored at samples.libav.org/samples. I understand that service is provided by VideoLAN. Right now, both repositories are known to be static. I’m open to brainstorms about how to improve the situation.

  • FFMPEG Unable to Decode Quicktime QDMC Stream (No decoder for stream)

    23 août 2017, par mbmast

    We are using FFMPEG to convert iPhone video to MP4. This requires an AAC decoder which is not included in any binary distributions of FFMPEG (due to licensing issues). The solution is to download the FFMPEG source and compile it yourself. I’ve done this, apparently incorrectly, as I cannot decode the audio stream. I am getting this error :

    /usr/ffmpeg_builds/ffmpeg -y -i /home/domain/public_html/wp-content/uploads/celebs/main/step-2.mov -threads 12 -vcodec libx264 -acodec libfdk_aac -b:v 1000k -refs 6 -coder 1 -sc_threshold 40 -flags +loop -me_range 16 -subq 7 -i_qfactor 0.71 -qcomp 0.6 -qdiff 4 -trellis 1 -b:a 128k -pass 1 -passlogfile /tmp/ffmpeg-passes57a054ee917c4ahl3t/pass-57a054ee91965 /home/domain/public_html/wp-content/uploads/celebs/main/testing-5.mp4
    ffmpeg version N-81827-g81bab10 Copyright (c) 2000-2016 the FFmpeg developers
     built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-17)
     configuration: --prefix=/root/ffmpeg_build --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --pkg-config-flags=--static --enable-gpl --enable-nonfree --enable-libfdk-aac --enable-libfreetype --enable-libx264
     libavutil      55. 32.100 / 55. 32.100
     libavcodec     57. 60.100 / 57. 60.100
     libavformat    57. 51.102 / 57. 51.102
     libavdevice    57.  0.102 / 57.  0.102
     libavfilter     6. 63.100 /  6. 63.100
     libswscale      4.  1.100 /  4.  1.100
     libswresample   2.  2.100 /  2.  2.100
     libpostproc    54.  0.100 / 54.  0.100
    Guessed Channel Layout for Input Stream #0.1 : mono
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/domain/public_html/wp-content/uploads/celebs/main/step-2.mov':
     Metadata:
       creation_time   : 1998-11-04T16:40:13.000000Z
     Duration: 00:01:00.83, start: 0.000000, bitrate: 110 kb/s
       Stream #0:0(eng): Video: svq1 (SVQ1 / 0x31515653), yuv410p, 160x120, 90 kb/s, 7.51 fps, 7.50 tbr, 600 tbn, 600 tbc (default)
       Metadata:
         creation_time   : 1998-11-04T16:40:13.000000Z
         handler_name    : Apple Alias Data Handler
         encoder         : Sorenson Video
       Stream #0:1(eng): Audio: qdmc (QDMC / 0x434D4451), 44100 Hz, mono (default)
       Metadata:
         creation_time   : 1998-11-04T16:40:13.000000Z
         handler_name    : Apple Alias Data Handler
    No decoder for stream #0:1, filtering impossible
    Error opening filters!

    I suspect that I failed to compile and include the correct codec library when I built FFMPEG. The problem is I don’t know which library I should have built/included. I haven’t found anything that says to decode QDMC audio in FFMPEG you need the XXXXX library.

    Here’s the complete list of decoders that my build supports :

    /usr/ffmpeg_builds/ffmpeg -decoders
    ffmpeg version N-81827-g81bab10 Copyright (c) 2000-2016 the FFmpeg developers
     built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-17)
     configuration: --prefix=/root/ffmpeg_build --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --pkg-config-flags=--static --enable-gpl --enable-nonfree --enable-libfdk-aac --enable-libfreetype --enable-libx264
     libavutil      55. 32.100 / 55. 32.100
     libavcodec     57. 60.100 / 57. 60.100
     libavformat    57. 51.102 / 57. 51.102
     libavdevice    57.  0.102 / 57.  0.102
     libavfilter     6. 63.100 /  6. 63.100
     libswscale      4.  1.100 /  4.  1.100
     libswresample   2.  2.100 /  2.  2.100
     libpostproc    54.  0.100 / 54.  0.100
    Decoders:
    V..... = Video
    A..... = Audio
    S..... = Subtitle
    .F.... = Frame-level multithreading
    ..S... = Slice-level multithreading
    ...X.. = Codec is experimental
    ....B. = Supports draw_horiz_band
    .....D = Supports direct rendering method 1
    ------
    V....D 012v                 Uncompressed 4:2:2 10-bit
    V....D 4xm                  4X Movie
    V....D 8bps                 QuickTime 8BPS video
    V....D aasc                 Autodesk RLE
    VF...D aic                  Apple Intermediate Codec
    V....D alias_pix            Alias/Wavefront PIX image
    V....D amv                  AMV Video
    V....D anm                  Deluxe Paint Animation
    V....D ansi                 ASCII/ANSI art
    VF...D apng                 APNG (Animated Portable Network Graphics) image
    V....D asv1                 ASUS V1
    V....D asv2                 ASUS V2
    V....D aura                 Auravision AURA
    V....D aura2                Auravision Aura 2
    V....D avrn                 Avid AVI Codec
    V....D avrp                 Avid 1:1 10-bit RGB Packer
    V....D avs                  AVS (Audio Video Standard) video
    V....D avui                 Avid Meridien Uncompressed
    V....D ayuv                 Uncompressed packed MS 4:4:4:4
    V....D bethsoftvid          Bethesda VID video
    V....D bfi                  Brute Force & Ignorance
    V....D binkvideo            Bink video
    V....D bintext              Binary text
    V....D bmp                  BMP (Windows and OS/2 bitmap)
    V....D bmv_video            Discworld II BMV video
    V....D brender_pix          BRender PIX image
    V....D c93                  Interplay C93
    V....D cavs                 Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)
    V....D cdgraphics           CD Graphics video
    V....D cdxl                 Commodore CDXL video
    VF...D cfhd                 Cineform HD
    V....D cinepak              Cinepak
    V....D cljr                 Cirrus Logic AccuPak
    V....D cllc                 Canopus Lossless Codec
    V....D eacmv                Electronic Arts CMV video (codec cmv)
    V....D cpia                 CPiA video format
    V....D camstudio            CamStudio (codec cscd)
    V....D cyuv                 Creative YUV (CYUV)
    V.S..D dds                  DirectDraw Surface image decoder
    V....D dfa                  Chronomaster DFA
    V.S..D dirac                BBC Dirac VC-2
    VFS..D dnxhd                VC3/DNxHD
    V....D dpx                  DPX (Digital Picture Exchange) image
    V....D dsicinvideo          Delphine Software International CIN video
    V.S..D dvvideo              DV (Digital Video)
    V....D dxa                  Feeble Files/ScummVM DXA
    V....D dxtory               Dxtory
    VFS..D dxv                  Resolume DXV
    V....D escape124            Escape 124
    V....D escape130            Escape 130
    VFS..D exr                  OpenEXR image
    VFS..D ffv1                 FFmpeg video codec #1
    VF..BD ffvhuff              Huffyuv FFmpeg variant
    V.S..D fic                  Mirillis FIC
    V....D flashsv              Flash Screen Video v1
    V....D flashsv2             Flash Screen Video v2
    V....D flic                 Autodesk Animator Flic video
    V...BD flv                  FLV / Sorenson Spark / Sorenson H.263 (Flash Video) (codec flv1)
    VF...D fraps                Fraps
    V....D frwu                 Forward Uncompressed
    V....D g2m                  Go2Meeting
    V....D gif                  GIF (Graphics Interchange Format)
    V....D h261                 H.261
    V...BD h263                 H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2
    V...BD h263i                Intel H.263
    V...BD h263p                H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2
    VFS..D h264                 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
    VFS..D hap                  Vidvox Hap decoder
    VFS..D hevc                 HEVC (High Efficiency Video Coding)
    V....D hnm4video            HNM 4 video
    V....D hq_hqa               Canopus HQ/HQA
    V.S..D hqx                  Canopus HQX
    VF..BD huffyuv              Huffyuv / HuffYUV
    V....D idcinvideo           id Quake II CIN video (codec idcin)
    V....D idf                  iCEDraw text
    V....D iff                  IFF ACBM/ANIM/DEEP/ILBM/PBM/RGB8/RGBN (codec iff_ilbm)
    V....D indeo2               Intel Indeo 2
    V....D indeo3               Intel Indeo 3
    V....D indeo4               Intel Indeo Video Interactive 4
    V....D indeo5               Intel Indeo Video Interactive 5
    V....D interplayvideo       Interplay MVE video
    VFS..D jpeg2000             JPEG 2000
    V....D jpegls               JPEG-LS
    V....D jv                   Bitmap Brothers JV video
    V....D kgv1                 Kega Game Video
    V....D kmvc                 Karl Morton's video codec
    VF...D lagarith             Lagarith lossless
    V....D loco                 LOCO
    V....D m101                 Matrox Uncompressed SD
    V....D eamad                Electronic Arts Madcow Video (codec mad)
    VFS..D magicyuv             MagicYUV video
    VF...D mdec                 Sony PlayStation MDEC (Motion DECoder)
    VF...D mimic                Mimic
    V....D mjpeg                MJPEG (Motion JPEG)
    V....D mjpegb               Apple MJPEG-B
    V....D mmvideo              American Laser Games MM Video
    V....D motionpixels         Motion Pixels video
    V.S.BD mpeg1video           MPEG-1 video
    V.S.BD mpeg2video           MPEG-2 video
    V.S.BD mpegvideo            MPEG-1 video (codec mpeg2video)
    VF..BD mpeg4                MPEG-4 part 2
    V....D msa1                 MS ATC Screen
    V...BD msmpeg4v1            MPEG-4 part 2 Microsoft variant version 1
    V...BD msmpeg4v2            MPEG-4 part 2 Microsoft variant version 2
    V...BD msmpeg4              MPEG-4 part 2 Microsoft variant version 3 (codec msmpeg4v3)
    V....D msrle                Microsoft RLE
    V....D mss1                 MS Screen 1
    V....D mss2                 MS Windows Media Video V9 Screen
    V....D msvideo1             Microsoft Video 1
    V....D mszh                 LCL (LossLess Codec Library) MSZH
    V....D mts2                 MS Expression Encoder Screen
    V....D mvc1                 Silicon Graphics Motion Video Compressor 1
    V....D mvc2                 Silicon Graphics Motion Video Compressor 2
    V....D mxpeg                Mobotix MxPEG video
    V....D nuv                  NuppelVideo/RTJPEG
    V....D paf_video            Amazing Studio Packed Animation File Video
    V....D pam                  PAM (Portable AnyMap) image
    V....D pbm                  PBM (Portable BitMap) image
    V....D pcx                  PC Paintbrush PCX image
    V....D pgm                  PGM (Portable GrayMap) image
    V....D pgmyuv               PGMYUV (Portable GrayMap YUV) image
    V....D pictor               Pictor/PC Paint
    VF...D png                  PNG (Portable Network Graphics) image
    V....D ppm                  PPM (Portable PixelMap) image
    V.S..D prores               ProRes
    V.S..D prores_lgpl          Apple ProRes (iCodec Pro) (codec prores)
    V....D ptx                  V.Flash PTX image
    V....D qdraw                Apple QuickDraw
    V....D qpeg                 Q-team QPEG
    V....D qtrle                QuickTime Animation (RLE) video
    V....D r10k                 AJA Kona 10-bit RGB Codec
    V....D r210                 Uncompressed RGB 10-bit
    V..... rawvideo             raw video
    V....D rl2                  RL2 video
    V....D roqvideo             id RoQ video (codec roq)
    V....D rpza                 QuickTime video (RPZA)
    V....D rscc                 innoHeim/Rsupport Screen Capture Codec
    V....D rv10                 RealVideo 1.0
    V....D rv20                 RealVideo 2.0
    VF...D rv30                 RealVideo 3.0
    VF...D rv40                 RealVideo 4.0
    V....D sanm                 LucasArts SANM/Smush video
    V....D screenpresso         Screenpresso
    V....D sgi                  SGI image
    V....D sgirle               Silicon Graphics RLE 8-bit video
    VF...D sheervideo           BitJazz SheerVideo
    V....D smackvid             Smacker video (codec smackvideo)
    V....D smc                  QuickTime Graphics (SMC)
    V..... smvjpeg              SMV JPEG
    V....D snow                 Snow
    V....D sp5x                 Sunplus JPEG (SP5X)
    V....D sunrast              Sun Rasterfile image
    V....D svq1                 Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1
    V...BD svq3                 Sorenson Vector Quantizer 3 / Sorenson Video 3 / SVQ3
    V....D targa                Truevision Targa image
    V....D targa_y216           Pinnacle TARGA CineWave YUV16
    V....D tdsc                 TDSC
    V....D eatgq                Electronic Arts TGQ video (codec tgq)
    V....D eatgv                Electronic Arts TGV video (codec tgv)
    VF..BD theora               Theora
    V....D thp                  Nintendo Gamecube THP video
    V....D tiertexseqvideo      Tiertex Limited SEQ video
    VF...D tiff                 TIFF image
    V....D tmv                  8088flex TMV
    V....D eatqi                Electronic Arts TQI Video (codec tqi)
    V....D truemotion1          Duck TrueMotion 1.0
    V....D truemotion2          Duck TrueMotion 2.0
    V....D truemotion2rt        Duck TrueMotion 2.0 Real Time
    V....D camtasia             TechSmith Screen Capture Codec (codec tscc)
    V....D tscc2                TechSmith Screen Codec 2
    V....D txd                  Renderware TXD (TeXture Dictionary) image
    V....D ultimotion           IBM UltiMotion (codec ulti)
    VF...D utvideo              Ut Video
    V....D v210                 Uncompressed 4:2:2 10-bit
    V....D v210x                Uncompressed 4:2:2 10-bit
    V....D v308                 Uncompressed packed 4:4:4
    V....D v408                 Uncompressed packed QT 4:4:4:4
    V....D v410                 Uncompressed 4:4:4 10-bit
    V....D vb                   Beam Software VB
    VF...D vble                 VBLE Lossless Codec
    V....D vc1                  SMPTE VC-1
    V....D vc1image             Windows Media Video 9 Image v2
    V....D vcr1                 ATI VCR1
    V....D xl                   Miro VideoXL (codec vixl)
    V....D vmdvideo             Sierra VMD video
    V....D vmnc                 VMware Screen Codec / VMware Video
    VF..BD vp3                  On2 VP3
    V....D vp5                  On2 VP5
    V....D vp6                  On2 VP6
    V.S..D vp6a                 On2 VP6 (Flash version, with alpha channel)
    V....D vp6f                 On2 VP6 (Flash version)
    V....D vp7                  On2 VP7
    VFS..D vp8                  On2 VP8
    VF...D vp9                  Google VP9
    VF...D webp                 WebP image
    V...BD wmv1                 Windows Media Video 7
    V...BD wmv2                 Windows Media Video 8
    V....D wmv3                 Windows Media Video 9
    V....D wmv3image            Windows Media Video 9 Image
    V....D wnv1                 Winnov WNV1
    V....D vqavideo             Westwood Studios VQA (Vector Quantized Animation) video (codec ws_vqa)
    V....D xan_wc3              Wing Commander III / Xan
    V....D xan_wc4              Wing Commander IV / Xxan
    V....D xbin                 eXtended BINary text
    V....D xbm                  XBM (X BitMap) image
    V..... xface                X-face image
    V....D xwd                  XWD (X Window Dump) image
    V....D y41p                 Uncompressed YUV 4:1:1 12-bit
    V....D ylc                  YUY2 Lossless Codec
    V..... yop                  Psygnosis YOP Video
    V....D yuv4                 Uncompressed packed 4:2:0
    V....D zerocodec            ZeroCodec Lossless Video
    V....D zlib                 LCL (LossLess Codec Library) ZLIB
    V....D zmbv                 Zip Motion Blocks Video
    A....D 8svx_exp             8SVX exponential
    A....D 8svx_fib             8SVX fibonacci
    A....D aac                  AAC (Advanced Audio Coding)
    A....D aac_fixed            AAC (Advanced Audio Coding) (codec aac)
    A....D libfdk_aac           Fraunhofer FDK AAC (codec aac)
    A....D aac_latm             AAC LATM (Advanced Audio Coding LATM syntax)
    A....D ac3                  ATSC A/52A (AC-3)
    A....D ac3_fixed            ATSC A/52A (AC-3) (codec ac3)
    A....D adpcm_4xm            ADPCM 4X Movie
    A....D adpcm_adx            SEGA CRI ADX ADPCM
    A....D adpcm_afc            ADPCM Nintendo Gamecube AFC
    A....D adpcm_aica           ADPCM Yamaha AICA
    A....D adpcm_ct             ADPCM Creative Technology
    A....D adpcm_dtk            ADPCM Nintendo Gamecube DTK
    A....D adpcm_ea             ADPCM Electronic Arts
    A....D adpcm_ea_maxis_xa    ADPCM Electronic Arts Maxis CDROM XA
    A....D adpcm_ea_r1          ADPCM Electronic Arts R1
    A....D adpcm_ea_r2          ADPCM Electronic Arts R2
    A....D adpcm_ea_r3          ADPCM Electronic Arts R3
    A....D adpcm_ea_xas         ADPCM Electronic Arts XAS
    A....D g722                 G.722 ADPCM (codec adpcm_g722)
    A....D g726                 G.726 ADPCM (codec adpcm_g726)
    A....D g726le               G.726 ADPCM little-endian (codec adpcm_g726le)
    A....D adpcm_ima_amv        ADPCM IMA AMV
    A....D adpcm_ima_apc        ADPCM IMA CRYO APC
    A....D adpcm_ima_dat4       ADPCM IMA Eurocom DAT4
    A....D adpcm_ima_dk3        ADPCM IMA Duck DK3
    A....D adpcm_ima_dk4        ADPCM IMA Duck DK4
    A....D adpcm_ima_ea_eacs    ADPCM IMA Electronic Arts EACS
    A....D adpcm_ima_ea_sead    ADPCM IMA Electronic Arts SEAD
    A....D adpcm_ima_iss        ADPCM IMA Funcom ISS
    A....D adpcm_ima_oki        ADPCM IMA Dialogic OKI
    A....D adpcm_ima_qt         ADPCM IMA QuickTime
    A....D adpcm_ima_rad        ADPCM IMA Radical
    A....D adpcm_ima_smjpeg     ADPCM IMA Loki SDL MJPEG
    A....D adpcm_ima_wav        ADPCM IMA WAV
    A....D adpcm_ima_ws         ADPCM IMA Westwood
    A....D adpcm_ms             ADPCM Microsoft
    A....D adpcm_mtaf           ADPCM MTAF
    A....D adpcm_psx            ADPCM Playstation
    A....D adpcm_sbpro_2        ADPCM Sound Blaster Pro 2-bit
    A....D adpcm_sbpro_3        ADPCM Sound Blaster Pro 2.6-bit
    A....D adpcm_sbpro_4        ADPCM Sound Blaster Pro 4-bit
    A....D adpcm_swf            ADPCM Shockwave Flash
    A....D adpcm_thp            ADPCM Nintendo THP
    A....D adpcm_thp_le         ADPCM Nintendo THP (little-endian)
    A....D adpcm_vima           LucasArts VIMA audio
    A....D adpcm_xa             ADPCM CDROM XA
    A....D adpcm_yamaha         ADPCM Yamaha
    AF...D alac                 ALAC (Apple Lossless Audio Codec)
    A....D amrnb                AMR-NB (Adaptive Multi-Rate NarrowBand) (codec amr_nb)
    A....D amrwb                AMR-WB (Adaptive Multi-Rate WideBand) (codec amr_wb)
    A....D ape                  Monkey's Audio
    A....D atrac1               ATRAC1 (Adaptive TRansform Acoustic Coding)
    A....D atrac3               ATRAC3 (Adaptive TRansform Acoustic Coding 3)
    A....D atrac3plus           ATRAC3+ (Adaptive TRansform Acoustic Coding 3+) (codec atrac3p)
    A....D on2avc               On2 Audio for Video Codec (codec avc)
    A....D binkaudio_dct        Bink Audio (DCT)
    A....D binkaudio_rdft       Bink Audio (RDFT)
    A....D bmv_audio            Discworld II BMV audio
    A....D comfortnoise         RFC 3389 comfort noise generator
    A....D cook                 Cook / Cooker / Gecko (RealAudio G2)
    A..... dsd_lsbf             DSD (Direct Stream Digital), least significant bit first
    A..... dsd_lsbf_planar      DSD (Direct Stream Digital), least significant bit first, planar
    A..... dsd_msbf             DSD (Direct Stream Digital), most significant bit first
    A..... dsd_msbf_planar      DSD (Direct Stream Digital), most significant bit first, planar
    A....D dsicinaudio          Delphine Software International CIN audio
    A....D dss_sp               Digital Speech Standard - Standard Play mode (DSS SP)
    A....D dst                  DST (Digital Stream Transfer)
    A....D dca                  DCA (DTS Coherent Acoustics) (codec dts)
    A....D dvaudio              Ulead DV Audio
    A....D eac3                 ATSC A/52B (AC-3, E-AC-3)
    A....D evrc                 EVRC (Enhanced Variable Rate Codec)
    AF...D flac                 FLAC (Free Lossless Audio Codec)
    A....D g723_1               G.723.1
    A....D g729                 G.729
    A....D gsm                  GSM
    A....D gsm_ms               GSM Microsoft variant
    A....D iac                  IAC (Indeo Audio Coder)
    A....D imc                  IMC (Intel Music Coder)
    A....D interplay_dpcm       DPCM Interplay
    A....D interplayacm         Interplay ACM
    A....D mace3                MACE (Macintosh Audio Compression/Expansion) 3:1
    A....D mace6                MACE (Macintosh Audio Compression/Expansion) 6:1
    A....D metasound            Voxware MetaSound
    A....D mlp                  MLP (Meridian Lossless Packing)
    A....D mp1                  MP1 (MPEG audio layer 1)
    A....D mp1float             MP1 (MPEG audio layer 1) (codec mp1)
    A....D mp2                  MP2 (MPEG audio layer 2)
    A....D mp2float             MP2 (MPEG audio layer 2) (codec mp2)
    A....D mp3                  MP3 (MPEG audio layer 3)
    A....D mp3float             MP3 (MPEG audio layer 3) (codec mp3)
    A....D mp3adu               ADU (Application Data Unit) MP3 (MPEG audio layer 3)
    A....D mp3adufloat          ADU (Application Data Unit) MP3 (MPEG audio layer 3) (codec mp3adu)
    A....D mp3on4               MP3onMP4
    A....D mp3on4float          MP3onMP4 (codec mp3on4)
    A....D als                  MPEG-4 Audio Lossless Coding (ALS) (codec mp4als)
    A....D mpc7                 Musepack SV7 (codec musepack7)
    A....D mpc8                 Musepack SV8 (codec musepack8)
    A....D nellymoser           Nellymoser Asao
    A....D opus                 Opus
    A....D paf_audio            Amazing Studio Packed Animation File Audio
    A....D pcm_alaw             PCM A-law / G.711 A-law
    A....D pcm_bluray           PCM signed 16|20|24-bit big-endian for Blu-ray media
    A....D pcm_dvd              PCM signed 16|20|24-bit big-endian for DVD media
    A....D pcm_f32be            PCM 32-bit floating point big-endian
    A....D pcm_f32le            PCM 32-bit floating point little-endian
    A....D pcm_f64be            PCM 64-bit floating point big-endian
    A....D pcm_f64le            PCM 64-bit floating point little-endian
    A....D pcm_lxf              PCM signed 20-bit little-endian planar
    A....D pcm_mulaw            PCM mu-law / G.711 mu-law
    A....D pcm_s16be            PCM signed 16-bit big-endian
    A....D pcm_s16be_planar     PCM signed 16-bit big-endian planar
    A....D pcm_s16le            PCM signed 16-bit little-endian
    A....D pcm_s16le_planar     PCM signed 16-bit little-endian planar
    A....D pcm_s24be            PCM signed 24-bit big-endian
    A....D pcm_s24daud          PCM D-Cinema audio signed 24-bit
    A....D pcm_s24le            PCM signed 24-bit little-endian
    A....D pcm_s24le_planar     PCM signed 24-bit little-endian planar
    A....D pcm_s32be            PCM signed 32-bit big-endian
    A....D pcm_s32le            PCM signed 32-bit little-endian
    A....D pcm_s32le_planar     PCM signed 32-bit little-endian planar
    A....D pcm_s64be            PCM signed 64-bit big-endian
    A....D pcm_s64le            PCM signed 64-bit little-endian
    A....D pcm_s8               PCM signed 8-bit
    A....D pcm_s8_planar        PCM signed 8-bit planar
    A....D pcm_u16be            PCM unsigned 16-bit big-endian
    A....D pcm_u16le            PCM unsigned 16-bit little-endian
    A....D pcm_u24be            PCM unsigned 24-bit big-endian
    A....D pcm_u24le            PCM unsigned 24-bit little-endian
    A....D pcm_u32be            PCM unsigned 32-bit big-endian
    A....D pcm_u32le            PCM unsigned 32-bit little-endian
    A....D pcm_u8               PCM unsigned 8-bit
    A....D pcm_zork             PCM Zork
    A....D qcelp                QCELP / PureVoice
    A....D qdm2                 QDesign Music Codec 2
    A....D real_144             RealAudio 1.0 (14.4K) (codec ra_144)
    A....D real_288             RealAudio 2.0 (28.8K) (codec ra_288)
    A....D ralf                 RealAudio Lossless
    A....D roq_dpcm             DPCM id RoQ
    A....D s302m                SMPTE 302M
    A....D sdx2_dpcm            DPCM Squareroot-Delta-Exact
    A....D shorten              Shorten
    A....D sipr                 RealAudio SIPR / ACELP.NET
    A....D smackaud             Smacker audio (codec smackaudio)
    A....D sol_dpcm             DPCM Sol
    A..X.D sonic                Sonic
    AF...D tak                  TAK (Tom's lossless Audio Kompressor)
    A....D truehd               TrueHD
    A....D truespeech           DSP Group TrueSpeech
    AF...D tta                  TTA (True Audio)
    A....D twinvq               VQF TwinVQ
    A....D vmdaudio             Sierra VMD audio
    A....D vorbis               Vorbis
    A....D wavesynth            Wave synthesis pseudo-codec
    AF...D wavpack              WavPack
    A....D ws_snd1              Westwood Audio (SND1) (codec westwood_snd1)
    A....D wmalossless          Windows Media Audio Lossless
    A....D wmapro               Windows Media Audio 9 Professional
    A....D wmav1                Windows Media Audio 1
    A....D wmav2                Windows Media Audio 2
    A....D wmavoice             Windows Media Audio Voice
    A....D xan_dpcm             DPCM Xan
    A....D xma1                 Xbox Media Audio 1
    A....D xma2                 Xbox Media Audio 2
    S..... ssa                  ASS (Advanced SubStation Alpha) subtitle (codec ass)
    S..... ass                  ASS (Advanced SubStation Alpha) subtitle
    S..... dvbsub               DVB subtitles (codec dvb_subtitle)
    S..... dvdsub               DVD subtitles (codec dvd_subtitle)
    S..... cc_dec               Closed Caption (EIA-608 / CEA-708) Decoder (codec eia_608)
    S..... pgssub               HDMV Presentation Graphic Stream subtitles (codec hdmv_pgs_subtitle)
    S..... jacosub              JACOsub subtitle
    S..... microdvd             MicroDVD subtitle
    S..... mov_text             3GPP Timed Text subtitle
    S..... mpl2                 MPL2 subtitle
    S..... pjs                  PJS subtitle
    S..... realtext             RealText subtitle
    S..... sami                 SAMI subtitle
    S..... stl                  Spruce subtitle format
    S..... srt                  SubRip subtitle (codec subrip)
    S..... subrip               SubRip subtitle
    S..... subviewer            SubViewer subtitle
    S..... subviewer1           SubViewer1 subtitle
    S..... text                 Raw text subtitle
    S..... vplayer              VPlayer subtitle
    S..... webvtt               WebVTT subtitle
    S..... xsub                 XSUB

    Any idea what I did wrong when building FFMPEG ?

    Here’s a link to the video file that caused the problem : step-2.mov

  • What flags should enable to get maximum performance using ffpeg ?

    19 octobre 2017, par Sam

    I am using windows, my application is using opencv and for codecs, we have used ffmpeg. We see the performance is very slow, we want to improve it by compiling ffmpeg with all flags which could take hardware and GPU acceleation into consideration.
    I did ./configure --help inside the ffmpeg source, I see below list option, can you please tell which all can really imporve the performance. Note that we would like to take advantage of hardware and gpu capabilities.

    $ ./configure —help
    Usage : configure [options]
    Options : [defaults in brackets after descriptions]

    Help options :
    —help print this message
    —quiet Suppress showing informative output
    —list-decoders show all available decoders
    —list-encoders show all available encoders
    —list-hwaccels show all available hardware accelerators
    —list-demuxers show all available demuxers
    —list-muxers show all available muxers
    —list-parsers show all available parsers
    —list-protocols show all available protocols
    —list-bsfs show all available bitstream filters
    —list-indevs show all available input devices
    —list-outdevs show all available output devices
    —list-filters show all available filters

    Standard options :
    —logfile=FILE log tests and output to FILE [ffbuild/config.log]
    —disable-logging do not log configure debug information
    —fatal-warnings fail if any configure warning is generated
    —prefix=PREFIX install in PREFIX [/usr/local]
    —bindir=DIR install binaries in DIR [PREFIX/bin]
    —datadir=DIR install data files in DIR [PREFIX/share/ffmpeg]
    —docdir=DIR install documentation in DIR [PREFIX/share/doc/ffmpeg ]
    —libdir=DIR install libs in DIR [PREFIX/lib]
    —shlibdir=DIR install shared libs in DIR [LIBDIR]
    —incdir=DIR install includes in DIR [PREFIX/include]
    —mandir=DIR install man page in DIR [PREFIX/share/man]
    —pkgconfigdir=DIR install pkg-config files in DIR [LIBDIR/pkgconfig]
    —enable-rpath use rpath to allow installing libraries in paths
    not part of the dynamic linker search path
    use rpath when linking programs (USE WITH CARE)
    —install-name-dir=DIR Darwin directory name for installed targets

    Licensing options :
    —enable-gpl allow use of GPL code, the resulting libs
    and binaries will be under GPL [no]
    —enable-version3 upgrade (L)GPL to version 3 [no]
    —enable-nonfree allow use of nonfree code, the resulting libs
    and binaries will be unredistributable [no]

    Configuration options :
    —disable-static do not build static libraries [no]
    —enable-shared build shared libraries [no]
    —enable-small optimize for size instead of speed
    —disable-runtime-cpudetect disable detecting CPU capabilities at runtime (sma ller binary)
    —enable-gray enable full grayscale support (slower color)
    —disable-swscale-alpha disable alpha channel support in swscale
    —disable-all disable building components, libraries and programs
    —disable-autodetect disable automatically detected external libraries [no ]

    Program options :
    —disable-programs do not build command line programs
    —disable-ffmpeg disable ffmpeg build
    —disable-ffplay disable ffplay build
    —disable-ffprobe disable ffprobe build
    —disable-ffserver disable ffserver build

    Documentation options :
    —disable-doc do not build documentation
    —disable-htmlpages do not build HTML documentation pages
    —disable-manpages do not build man documentation pages
    —disable-podpages do not build POD documentation pages
    —disable-txtpages do not build text documentation pages

    Component options :
    —disable-avdevice disable libavdevice build
    —disable-avcodec disable libavcodec build
    —disable-avformat disable libavformat build
    —disable-swresample disable libswresample build
    —disable-swscale disable libswscale build
    —disable-postproc disable libpostproc build
    —disable-avfilter disable libavfilter build
    —enable-avresample enable libavresample build [no]
    —disable-pthreads disable pthreads [autodetect]
    —disable-w32threads disable Win32 threads [autodetect]
    —disable-os2threads disable OS/2 threads [autodetect]
    —disable-network disable network support [no]
    —disable-dct disable DCT code
    —disable-dwt disable DWT code
    —disable-error-resilience disable error resilience code
    —disable-lsp disable LSP code
    —disable-lzo disable LZO decoder code
    —disable-mdct disable MDCT code
    —disable-rdft disable RDFT code
    —disable-fft disable FFT code
    —disable-faan disable floating point AAN (I)DCT code
    —disable-pixelutils disable pixel utils in libavutil

    Individual component options :
    —disable-everything disable all components listed below
    —disable-encoder=NAME disable encoder NAME
    —enable-encoder=NAME enable encoder NAME
    —disable-encoders disable all encoders
    —disable-decoder=NAME disable decoder NAME
    —enable-decoder=NAME enable decoder NAME
    —disable-decoders disable all decoders
    —disable-hwaccel=NAME disable hwaccel NAME
    —enable-hwaccel=NAME enable hwaccel NAME
    —disable-hwaccels disable all hwaccels
    —disable-muxer=NAME disable muxer NAME
    —enable-muxer=NAME enable muxer NAME
    —disable-muxers disable all muxers
    —disable-demuxer=NAME disable demuxer NAME
    —enable-demuxer=NAME enable demuxer NAME
    —disable-demuxers disable all demuxers
    —enable-parser=NAME enable parser NAME
    —disable-parser=NAME disable parser NAME
    —disable-parsers disable all parsers
    —enable-bsf=NAME enable bitstream filter NAME
    —disable-bsf=NAME disable bitstream filter NAME
    —disable-bsfs disable all bitstream filters
    —enable-protocol=NAME enable protocol NAME
    —disable-protocol=NAME disable protocol NAME
    —disable-protocols disable all protocols
    —enable-indev=NAME enable input device NAME
    —disable-indev=NAME disable input device NAME
    —disable-indevs disable input devices
    —enable-outdev=NAME enable output device NAME
    —disable-outdev=NAME disable output device NAME
    —disable-outdevs disable output devices
    —disable-devices disable all devices
    —enable-filter=NAME enable filter NAME
    —disable-filter=NAME disable filter NAME
    —disable-filters disable all filters
    —disable-v4l2_m2m disable V4L2 mem2mem code [autodetect]

    External library support :

    Using any of the following switches will allow FFmpeg to link to the
    corresponding external library. All the components depending on that library
    will become enabled, if all their other dependencies are met and they are not
    explicitly disabled. E.g. —enable-libwavpack will enable linking to
    libwavpack and allow the libwavpack encoder to be built, unless it is
    specifically disabled with —disable-encoder=libwavpack.

    Note that only the system libraries are auto-detected. All the other external
    libraries must be explicitly enabled.

    Also note that the following help text describes the purpose of the libraries
    themselves, not all their features will necessarily be usable by FFmpeg.

    —disable-alsa disable ALSA support [autodetect]
    —disable-appkit disable Apple AppKit framework [autodetect]
    —disable-avfoundation disable Apple AVFoundation framework [autodetect]
    —enable-avisynth enable reading of AviSynth script files [no]
    —disable-bzlib disable bzlib [autodetect]
    —disable-coreimage disable Apple CoreImage framework [autodetect]
    —enable-chromaprint enable audio fingerprinting with chromaprint [no]
    —enable-frei0r enable frei0r video filtering [no]
    —enable-gcrypt enable gcrypt, needed for rtmp(t)e support
    if openssl, librtmp or gmp is not used [no]
    —enable-gmp enable gmp, needed for rtmp(t)e support
    if openssl or librtmp is not used [no]
    —enable-gnutls enable gnutls, needed for https support
    if openssl is not used [no]
    —disable-iconv disable iconv [autodetect]
    —disable-jack disable libjack support [autodetect]
    —enable-jni enable JNI support [no]
    —enable-ladspa enable LADSPA audio filtering [no]
    —enable-libass enable libass subtitles rendering,
    needed for subtitles and ass filter [no]
    —enable-libbluray enable BluRay reading using libbluray [no]
    —enable-libbs2b enable bs2b DSP library [no]
    —enable-libcaca enable textual display using libcaca [no]
    —enable-libcelt enable CELT decoding via libcelt [no]
    —enable-libcdio enable audio CD grabbing with libcdio [no]
    —enable-libdc1394 enable IIDC-1394 grabbing using libdc1394
    and libraw1394 [no]
    —enable-libfdk-aac enable AAC de/encoding via libfdk-aac [no]
    —enable-libflite enable flite (voice synthesis) support via libflite [ no]
    —enable-libfontconfig enable libfontconfig, useful for drawtext filter [no]
    —enable-libfreetype enable libfreetype, needed for drawtext filter [no]
    —enable-libfribidi enable libfribidi, improves drawtext filter [no]
    —enable-libgme enable Game Music Emu via libgme [no]
    —enable-libgsm enable GSM de/encoding via libgsm [no]
    —enable-libiec61883 enable iec61883 via libiec61883 [no]
    —enable-libilbc enable iLBC de/encoding via libilbc [no]
    —enable-libkvazaar enable HEVC encoding via libkvazaar [no]
    —enable-libmodplug enable ModPlug via libmodplug [no]
    —enable-libmp3lame enable MP3 encoding via libmp3lame [no]
    —enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no ]
    —enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
    —enable-libopencv enable video filtering via libopencv [no]
    —enable-libopenh264 enable H.264 encoding via OpenH264 [no]
    —enable-libopenjpeg enable JPEG 2000 de/encoding via OpenJPEG [no]
    —enable-libopenmpt enable decoding tracked files via libopenmpt [no]
    —enable-libopus enable Opus de/encoding via libopus [no]
    —enable-libpulse enable Pulseaudio input via libpulse [no]
    —enable-librsvg enable SVG rasterization via librsvg [no]
    —enable-librubberband enable rubberband needed for rubberband filter [no]
    —enable-librtmp enable RTMP[E] support via librtmp [no]
    —enable-libshine enable fixed-point MP3 encoding via libshine [no]
    —enable-libsmbclient enable Samba protocol via libsmbclient [no]
    —enable-libsnappy enable Snappy compression, needed for hap encoding [n o]
    —enable-libsoxr enable Include libsoxr resampling [no]
    —enable-libspeex enable Speex de/encoding via libspeex [no]
    —enable-libssh enable SFTP protocol via libssh [no]
    —enable-libtesseract enable Tesseract, needed for ocr filter [no]
    —enable-libtheora enable Theora encoding via libtheora [no]
    —enable-libtwolame enable MP2 encoding via libtwolame [no]
    —enable-libv4l2 enable libv4l2/v4l-utils [no]
    —enable-libvidstab enable video stabilization using vid.stab [no]
    —enable-libvmaf enable vmaf filter via libvmaf [no]
    —enable-libvo-amrwbenc enable AMR-WB encoding via libvo-amrwbenc [no]
    —enable-libvorbis enable Vorbis en/decoding via libvorbis,
    native implementation exists [no]
    —enable-libvpx enable VP8 and VP9 de/encoding via libvpx [no]
    —enable-libwavpack enable wavpack encoding via libwavpack [no]
    —enable-libwebp enable WebP encoding via libwebp [no]
    —enable-libx264 enable H.264 encoding via x264 [no]
    —enable-libx265 enable HEVC encoding via x265 [no]
    —enable-libxavs enable AVS encoding via xavs [no]
    —enable-libxcb enable X11 grabbing using XCB [autodetect]
    —enable-libxcb-shm enable X11 grabbing shm communication [autodetect]
    —enable-libxcb-xfixes enable X11 grabbing mouse rendering [autodetect]
    —enable-libxcb-shape enable X11 grabbing shape rendering [autodetect]
    —enable-libxvid enable Xvid encoding via xvidcore,
    native MPEG-4/Xvid encoder exists [no]
    —enable-libxml2 enable XML parsing using the C library libxml2 [no]
    —enable-libzimg enable z.lib, needed for zscale filter [no]
    —enable-libzmq enable message passing via libzmq [no]
    —enable-libzvbi enable teletext support via libzvbi [no]
    —disable-lzma disable lzma [autodetect]
    —enable-decklink enable Blackmagic DeckLink I/O support [no]
    —enable-libndi_newtek enable Newteck NDI I/O support [no]
    —enable-mediacodec enable Android MediaCodec support [no]
    —enable-libmysofa enable libmysofa, needed for sofalizer filter [no]
    —enable-openal enable OpenAL 1.1 capture support [no]
    —enable-opencl enable OpenCL code
    —enable-opengl enable OpenGL rendering [no]
    —enable-openssl enable openssl, needed for https support
    if gnutls is not used [no]
    —disable-sndio disable sndio support [autodetect]
    —disable-schannel disable SChannel SSP, needed for TLS support on
    Windows if openssl and gnutls are not used [autodetec t]
    —disable-sdl2 disable sdl2 [autodetect]
    —disable-securetransport disable Secure Transport, needed for TLS support
    on OSX if openssl and gnutls are not used [autodetect ]
    —disable-xlib disable xlib [autodetect]
    —disable-zlib disable zlib [autodetect]

    The following libraries provide various hardware acceleration features :
    —disable-audiotoolbox disable Apple AudioToolbox code [autodetect]
    —disable-cuda disable dynamically linked Nvidia CUDA code [autodete ct]
    —enable-cuda-sdk enable CUDA features that require the CUDA SDK [no]
    —disable-cuvid disable Nvidia CUVID support [autodetect]
    —disable-d3d11va disable Microsoft Direct3D 11 video acceleration code [autodetect]
    —disable-dxva2 disable Microsoft DirectX 9 video acceleration code [ autodetect]
    —enable-libdrm enable DRM code (Linux) [no]
    —enable-libmfx enable Intel MediaSDK (AKA Quick Sync Video) code via libmfx [no]
    —enable-libnpp enable Nvidia Performance Primitives-based code [no]
    —enable-mmal enable Broadcom Multi-Media Abstraction Layer (Raspbe rry Pi) via MMAL [no]
    —disable-nvenc disable Nvidia video encoding code [autodetect]
    —enable-omx enable OpenMAX IL code [no]
    —enable-omx-rpi enable OpenMAX IL code for Raspberry Pi [no]
    —enable-rkmpp enable Rockchip Media Process Platform code [no]
    —disable-vaapi disable Video Acceleration API (mainly Unix/Intel) co de [autodetect]
    —disable-vda disable Apple Video Decode Acceleration code [autodet ect]
    —disable-vdpau disable Nvidia Video Decode and Presentation API for Unix code [autodetect]
    —disable-videotoolbox disable VideoToolbox code [autodetect]

    Toolchain options :
    —arch=ARCH select architecture []
    —cpu=CPU select the minimum required CPU (affects
    instruction selection, may crash on older CPUs)
    —cross-prefix=PREFIX use PREFIX for compilation tools []
    —progs-suffix=SUFFIX program name suffix []
    —enable-cross-compile assume a cross-compiler is used
    —sysroot=PATH root of cross-build tree
    —sysinclude=PATH location of cross-build system headers
    —target-os=OS compiler targets OS []
    —target-exec=CMD command to run executables on target
    —target-path=DIR path to view of build directory on target
    —target-samples=DIR path to samples directory on target
    —tempprefix=PATH force fixed dir/prefix instead of mktemp for checks
    —toolchain=NAME set tool defaults according to NAME
    —nm=NM use nm tool NM [nm -g]
    —ar=AR use archive tool AR [ar]
    —as=AS use assembler AS []
    —ln_s=LN_S use symbolic link tool LN_S [ln -s -f]
    —strip=STRIP use strip tool STRIP [strip]
    —windres=WINDRES use windows resource compiler WINDRES [windres]
    —x86asmexe=EXE use nasm-compatible assembler EXE [nasm]
    —cc=CC use C compiler CC [gcc]
    —cxx=CXX use C compiler CXX [g++]
    —objcc=OCC use ObjC compiler OCC [gcc]
    —dep-cc=DEPCC use dependency generator DEPCC [gcc]
    —nvcc=NVCC use Nvidia CUDA compiler NVCC [nvcc]
    —ld=LD use linker LD []
    —pkg-config=PKGCONFIG use pkg-config tool PKGCONFIG [pkg-config]
    —pkg-config-flags=FLAGS pass additional flags to pkgconf []
    —ranlib=RANLIB use ranlib RANLIB [ranlib]
    —doxygen=DOXYGEN use DOXYGEN to generate API doc [doxygen]
    —host-cc=HOSTCC use host C compiler HOSTCC
    —host-cflags=HCFLAGS use HCFLAGS when compiling for host
    —host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
    —host-ld=HOSTLD use host linker HOSTLD
    —host-ldflags=HLDFLAGS use HLDFLAGS when linking for host
    —host-libs=HLIBS use libs HLIBS when linking for host
    —host-os=OS compiler host OS []
    —extra-cflags=ECFLAGS add ECFLAGS to CFLAGS []
    —extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS []
    —extra-objcflags=FLAGS add FLAGS to OBJCFLAGS []
    —extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS []
    —extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS []
    —extra-ldlibflags=ELDFLAGS add ELDFLAGS to LDLIBFLAGS []
    —extra-libs=ELIBS add ELIBS []
    —extra-version=STRING version string suffix []
    —optflags=OPTFLAGS override optimization-related compiler flags
    —nvccflags=NVCCFLAGS override nvcc flags [-gencode arch=compute_30,code=sm _30 -O2]
    —build-suffix=SUFFIX library name suffix []
    —enable-pic build position-independent code
    —enable-thumb compile for Thumb instruction set
    —enable-lto use link-time optimization
    —env="ENV=override" override the environment variables

    Advanced options (experts only) :
    —malloc-prefix=PREFIX prefix malloc and related names with PREFIX
    —custom-allocator=NAME use a supported custom allocator
    —disable-symver disable symbol versioning
    —enable-hardcoded-tables use hardcoded tables instead of runtime generation
    —disable-safe-bitstream-reader
    disable buffer boundary checking in bitreaders
    (faster, but may crash)
    —sws-max-filter-size=N the max filter size swscale uses [256]

    Optimization options (experts only) :
    —disable-asm disable all assembly optimizations
    —disable-altivec disable AltiVec optimizations
    —disable-vsx disable VSX optimizations
    —disable-power8 disable POWER8 optimizations
    —disable-amd3dnow disable 3DNow ! optimizations
    —disable-amd3dnowext disable 3DNow ! extended optimizations
    —disable-mmx disable MMX optimizations
    —disable-mmxext disable MMXEXT optimizations
    —disable-sse disable SSE optimizations
    —disable-sse2 disable SSE2 optimizations
    —disable-sse3 disable SSE3 optimizations
    —disable-ssse3 disable SSSE3 optimizations
    —disable-sse4 disable SSE4 optimizations
    —disable-sse42 disable SSE4.2 optimizations
    —disable-avx disable AVX optimizations
    —disable-xop disable XOP optimizations
    —disable-fma3 disable FMA3 optimizations
    —disable-fma4 disable FMA4 optimizations
    —disable-avx2 disable AVX2 optimizations
    —disable-aesni disable AESNI optimizations
    —disable-armv5te disable armv5te optimizations
    —disable-armv6 disable armv6 optimizations
    —disable-armv6t2 disable armv6t2 optimizations
    —disable-vfp disable VFP optimizations
    —disable-neon disable NEON optimizations
    —disable-inline-asm disable use of inline assembly
    —disable-x86asm disable use of standalone x86 assembly
    —disable-mipsdsp disable MIPS DSP ASE R1 optimizations
    —disable-mipsdspr2 disable MIPS DSP ASE R2 optimizations
    —disable-msa disable MSA optimizations
    —disable-mipsfpu disable floating point MIPS optimizations
    —disable-mmi disable Loongson SIMD optimizations
    —disable-fast-unaligned consider unaligned accesses slow

    Developer options (useful when working on FFmpeg itself) :
    —disable-debug disable debugging symbols
    —enable-debug=LEVEL set the debug level []
    —disable-optimizations disable compiler optimizations
    —enable-extra-warnings enable more compiler warnings
    —disable-stripping disable stripping of executables and shared libraries
    —assert-level=level 0(default), 1 or 2, amount of assertion testing,
    2 causes a slowdown at runtime.
    —enable-memory-poisoning fill heap uninitialized allocated space with arbitra ry data
    —valgrind=VALGRIND run "make fate" tests through valgrind to detect memo ry
    leaks and errors, using the specified valgrind binary .
    Cannot be combined with —target-exec
    —enable-ftrapv Trap arithmetic overflows
    —samples=PATH location of test samples for FATE, if not set use
    $FATE_SAMPLES at make invocation time.
    —enable-neon-clobber-test check NEON registers for clobbering (should be
    used only for debugging purposes)
    —enable-xmm-clobber-test check XMM registers for clobbering (Win64-only ;
    should be used only for debugging purposes)
    —enable-random randomly enable/disable components
    —disable-random
    —enable-random=LIST randomly enable/disable specific components or
    —disable-random=LIST component groups. LIST is a comma-separated list
    of NAME[:PROB] entries where NAME is a component
    (group) and PROB the probability associated with
    NAME (default 0.5).
    —random-seed=VALUE seed value for —enable/disable-random
    —disable-valgrind-backtrace do not print a backtrace under Valgrind
    (only applies to —disable-optimizations builds)
    —enable-osfuzz Enable building fuzzer tool
    —libfuzzer=PATH path to libfuzzer
    —ignore-tests=TESTS comma-separated list (without "fate-" prefix
    in the name) of tests whose result is ignored
    —enable-linux-perf enable Linux Performance Monitor API

    NOTE : Object files are built at the place where configure is launched.