Recherche avancée

Médias (91)

Autres articles (49)

  • Ajouter des informations spécifiques aux utilisateurs et autres modifications de comportement liées aux auteurs

    12 avril 2011, par

    La manière la plus simple d’ajouter des informations aux auteurs est d’installer le plugin Inscription3. Il permet également de modifier certains comportements liés aux utilisateurs (référez-vous à sa documentation pour plus d’informations).
    Il est également possible d’ajouter des champs aux auteurs en installant les plugins champs extras 2 et Interface pour champs extras.

  • De l’upload à la vidéo finale [version standalone]

    31 janvier 2010, par

    Le chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
    Upload et récupération d’informations de la vidéo source
    Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
    Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...)

  • Gestion générale des documents

    13 mai 2011, par

    MédiaSPIP ne modifie jamais le document original mis en ligne.
    Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
    Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...)

Sur d’autres sites (5409)

  • FFMPEG latest version for Wamp or Xampp

    28 septembre 2014, par Ÿüšhä Kĥãn

    I have seen the php ffmpeg project
    http://sourceforge.net/projects/ffmpeg-php/files/
    the last version was 0.6 in 2008 but I need ffmpeg 1.8 to work on a video sharing script. SO I googled it but came with no results. Anyone know how can I get the php_ffmpeg.dll (for windows i mean) latest version for working with it on my localhost on wamp or xampp ?

  • cannot convert FLV to MP4 despite compiling ffmpeg with all codecs

    1er novembre 2013, par Rubytastic

    Try to convert FLV to MP4 with below params, but it always fails. I included also list of codeces that are compiled in. Why It will not convert the FLV to MP4, who knows ?

     ffmpeg -y -i stream2.flv -acodec libmp3lame -ar 44100 -ac 1 -vcodec libx264 stream2.mp4;
    
ffmpeg version git-2013-11-01-64a0ed1 Copyright (c) 2000-2013 the FFmpeg developers
    
  built on Nov  1 2013 14:44:29 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-3)
    
  configuration: --prefix=/root/ffmpeg_build --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --extra-libs=-ldl --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264
    
  libavutil      52. 49.100 / 52. 49.100
    
  libavcodec     55. 40.100 / 55. 40.100
    
  libavformat    55. 20.100 / 55. 20.100
    
  libavdevice    55.  5.100 / 55.  5.100
    
  libavfilter     3. 90.100 /  3. 90.100
    
  libswscale      2.  5.101 /  2.  5.101
    
  libswresample   0. 17.104 /  0. 17.104
    
  libpostproc    52.  3.100 / 52.  3.100
    
Input #0, flv, from 'stream2.flv':
    
  Duration: 00:00:01.60, start: 0.000000, bitrate: 636 kb/s
    
    Stream #0:0: Video: h264 (Baseline), yuv420p(tv), 640x480 [SAR 1:1 DAR 4:3], 11.92 tbr, 1k tbn, 60 tbc
    
    Stream #0:1: Audio: speex, 16000 Hz, mono
    
[graph 1 input from stream 0:1 @ 0xb000d40] Invalid sample format (null)
    
Error opening filters!

    i followed the official compile documentation with all the codes, this is my full codec list :

    ffmpeg version git-2013-11-01-64a0ed1 Copyright (c) 2000-2013 the FFmpeg developers
    
  built on Nov  1 2013 14:44:29 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-3)
    
  configuration: --prefix=/root/ffmpeg_build --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --extra-libs=-ldl --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264
    
  libavutil      52. 49.100 / 52. 49.100
    
  libavcodec     55. 40.100 / 55. 40.100
    
  libavformat    55. 20.100 / 55. 20.100
    
  libavdevice    55.  5.100 / 55.  5.100
    
  libavfilter     3. 90.100 /  3. 90.100
    
  libswscale      2.  5.101 /  2.  5.101
    
  libswresample   0. 17.104 /  0. 17.104
    
  libpostproc    52.  3.100 / 52.  3.100
    
Codecs:
    
 D..... = Decoding supported
    
 .E.... = Encoding supported
    
 ..V... = Video codec
    
 ..A... = Audio codec
    
 ..S... = Subtitle codec
    
 ...I.. = Intra frame-only codec
    
 ....L. = Lossy compression
    
 .....S = Lossless compression
    
 -------
    
 D.VI.. 012v                 Uncompressed 4:2:2 10-bit
    
 D.V.L. 4xm                  4X Movie
    
 D.VI.S 8bps                 QuickTime 8BPS video
    
 .EVIL. a64_multi            Multicolor charset for Commodore 64 (encoders: a64multi )
    
 .EVIL. a64_multi5           Multicolor charset for Commodore 64, extended with 5th color (colram) (encoders: a64multi5 )
    
 D.V..S aasc                 Autodesk RLE
    
 D.VIL. aic                  Apple Intermediate Codec
    
 DEVIL. amv                  AMV Video
    
 D.V.L. anm                  Deluxe Paint Animation
    
 D.V.L. ansi                 ASCII/ANSI art
    
 DEVIL. asv1                 ASUS V1
    
 DEVIL. asv2                 ASUS V2
    
 D.VIL. aura                 Auravision AURA
    
 D.VIL. aura2                Auravision Aura 2
    
 D.V... avrn                 Avid AVI Codec
    
 DEVI.. avrp                 Avid 1:1 10-bit RGB Packer
    
 D.V.L. avs                  AVS (Audio Video Standard) video
    
 DEVI.. avui                 Avid Meridien Uncompressed
    
 DEVI.. ayuv                 Uncompressed packed MS 4:4:4:4
    
 D.V.L. bethsoftvid          Bethesda VID video
    
 D.V.L. bfi                  Brute Force & Ignorance
    
 D.V.L. binkvideo            Bink video
    
 D.VI.. bintext              Binary text
    
 DEVI.S bmp                  BMP (Windows and OS/2 bitmap)
    
 D.V..S bmv_video            Discworld II BMV video
    
 D.VI.S brender_pix          BRender PIX image
    
 D.V.L. c93                  Interplay C93
    
 D.V.L. cavs                 Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)
    
 D.V.L. cdgraphics           CD Graphics video
    
 D.VIL. cdxl                 Commodore CDXL video
    
 D.V.L. cinepak              Cinepak
    
 DEVIL. cljr                 Cirrus Logic AccuPak
    
 D.VI.S cllc                 Canopus Lossless Codec
    
 D.V.L. cmv                  Electronic Arts CMV video (decoders: eacmv )
    
 D.V... cpia                 CPiA video format
    
 D.V..S cscd                 CamStudio (decoders: camstudio )
    
 D.VIL. cyuv                 Creative YUV (CYUV)
    
 D.V.L. dfa                  Chronomaster DFA
    
 D.V.LS dirac                Dirac
    
 DEVIL. dnxhd                VC3/DNxHD
    
 DEVI.S dpx                  DPX (Digital Picture Exchange) image
    
 D.V.L. dsicinvideo          Delphine Software International CIN video
    
 DEVIL. dvvideo              DV (Digital Video)
    
 D.V..S dxa                  Feeble Files/ScummVM DXA
    
 D.VI.S dxtory               Dxtory
    
 D.V.L. escape124            Escape 124
    
 D.V.L. escape130            Escape 130
    
 D.VILS exr                  OpenEXR image
    
 DEV..S ffv1                 FFmpeg video codec #1
    
 DEVI.S ffvhuff              Huffyuv FFmpeg variant
    
 DEV..S flashsv              Flash Screen Video v1
    
 DEV.L. flashsv2             Flash Screen Video v2
    
 D.V..S flic                 Autodesk Animator Flic video
    
 DEV.L. flv1                 FLV / Sorenson Spark / Sorenson H.263 (Flash Video) (decoders: flv ) (encoders: flv )
    
 D.V..S fraps                Fraps
    
 D.VI.S frwu                 Forward Uncompressed
    
 D.V.L. g2m                  Go2Meeting
    
 DEV..S gif                  GIF (Graphics Interchange Format)
    
 DEV.L. h261                 H.261
    
 DEV.L. h263                 H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2
    
 D.V.L. h263i                Intel H.263
    
 DEV.L. h263p                H.263+ / H.263-1998 / H.263 version 2
    
 DEV.LS h264                 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (encoders: libx264 libx264rgb )
    
 D.V.LS hevc                 H.265 / HEVC
    
 D.V.L. hnm4video            HNM 4 video
    
 DEVI.S huffyuv              HuffYUV
    
 D.V.L. idcin                id Quake II CIN video (decoders: idcinvideo )
    
 D.VI.. idf                  iCEDraw text
    
 D.V.L. iff_byterun1         IFF ByteRun1 (decoders: iff )
    
 D.V.L. iff_ilbm             IFF ILBM (decoders: iff )
    
 D.V.L. indeo2               Intel Indeo 2
    
 D.V.L. indeo3               Intel Indeo 3
    
 D.V.L. indeo4               Intel Indeo Video Interactive 4
    
 D.V.L. indeo5               Intel Indeo Video Interactive 5
    
 D.V.L. interplayvideo       Interplay MVE video
    
 DEVILS jpeg2000             JPEG 2000
    
 DEVILS jpegls               JPEG-LS
    
 D.VIL. jv                   Bitmap Brothers JV video
    
 D.V.L. kgv1                 Kega Game Video
    
 D.V.L. kmvc                 Karl Morton's video codec
    
 D.VI.S lagarith             Lagarith lossless
    
 .EVI.S ljpeg                Lossless JPEG
    
 D.VI.S loco                 LOCO
    
 D.V.L. mad                  Electronic Arts Madcow Video (decoders: eamad )
    
 D.VIL. mdec                 Sony PlayStation MDEC (Motion DECoder)
    
 D.V.L. mimic                Mimic
    
 DEVIL. mjpeg                Motion JPEG
    
 D.VIL. mjpegb               Apple MJPEG-B
    
 D.V.L. mmvideo              American Laser Games MM Video
    
 D.V.L. motionpixels         Motion Pixels video
    
 DEV.L. mpeg1video           MPEG-1 video
    
 DEV.L. mpeg2video           MPEG-2 video (decoders: mpeg2video mpegvideo )
    
 DEV.L. mpeg4                MPEG-4 part 2
    
 ..V.L. mpegvideo_xvmc       MPEG-1/2 video XvMC (X-Video Motion Compensation)
    
 D.V.L. msa1                 MS ATC Screen
    
 D.V.L. msmpeg4v1            MPEG-4 part 2 Microsoft variant version 1
    
 DEV.L. msmpeg4v2            MPEG-4 part 2 Microsoft variant version 2
    
 DEV.L. msmpeg4v3            MPEG-4 part 2 Microsoft variant version 3 (decoders: msmpeg4 ) (encoders: msmpeg4 )
    
 D.V..S msrle                Microsoft RLE
    
 D.V.L. mss1                 MS Screen 1
    
 D.VIL. mss2                 MS Windows Media Video V9 Screen
    
 DEV.L. msvideo1             Microsoft Video 1
    
 D.VI.S mszh                 LCL (LossLess Codec Library) MSZH
    
 D.V.L. mts2                 MS Expression Encoder Screen
    
 D.VIL. mvc1                 Silicon Graphics Motion Video Compressor 1
    
 D.VIL. mvc2                 Silicon Graphics Motion Video Compressor 2
    
 D.V.L. mxpeg                Mobotix MxPEG video
    
 D.V.L. nuv                  NuppelVideo/RTJPEG
    
 D.V.L. paf_video            Amazing Studio Packed Animation File Video
    
 DEVI.S pam                  PAM (Portable AnyMap) image
    
 DEVI.S pbm                  PBM (Portable BitMap) image
    
 DEVI.S pcx                  PC Paintbrush PCX image
    
 DEVI.S pgm                  PGM (Portable GrayMap) image
    
 DEVI.S pgmyuv               PGMYUV (Portable GrayMap YUV) image
    
 D.VIL. pictor               Pictor/PC Paint
    
 DEV..S png                  PNG (Portable Network Graphics) image
    
 DEVI.S ppm                  PPM (Portable PixelMap) image
    
 DEVIL. prores               Apple ProRes (iCodec Pro) (decoders: prores prores_lgpl ) (encoders: prores prores_aw prores_ks )
    
 D.VIL. ptx                  V.Flash PTX image
    
 D.VI.S qdraw                Apple QuickDraw
    
 D.V.L. qpeg                 Q-team QPEG
    
 DEV..S qtrle                QuickTime Animation (RLE) video
    
 DEVI.S r10k                 AJA Kona 10-bit RGB Codec
    
 DEVI.S r210                 Uncompressed RGB 10-bit
    
 DEVI.S rawvideo             raw video
    
 D.VIL. rl2                  RL2 video
    
 DEV.L. roq                  id RoQ video (decoders: roqvideo ) (encoders: roqvideo )
    
 D.V.L. rpza                 QuickTime video (RPZA)
    
 DEV.L. rv10                 RealVideo 1.0
    
 DEV.L. rv20                 RealVideo 2.0
    
 D.V.L. rv30                 RealVideo 3.0
    
 D.V.L. rv40                 RealVideo 4.0
    
 D.V.L. sanm                 LucasArts SMUSH video
    
 DEVI.S sgi                  SGI image
    
 D.VI.S sgirle               SGI RLE 8-bit
    
 D.V.L. smackvideo           Smacker video (decoders: smackvid )
    
 D.V.L. smc                  QuickTime Graphics (SMC)
    
 D.V... smv                  Sigmatel Motion Video (decoders: smvjpeg )
    
 DEV.LS snow                 Snow
    
 D.VIL. sp5x                 Sunplus JPEG (SP5X)
    
 DEVI.S sunrast              Sun Rasterfile image
    
 DEV.L. svq1                 Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1
    
 D.V.L. svq3                 Sorenson Vector Quantizer 3 / Sorenson Video 3 / SVQ3
    
 DEVI.S targa                Truevision Targa image
    
 D.VI.. targa_y216           Pinnacle TARGA CineWave YUV16
    
 D.V.L. tgq                  Electronic Arts TGQ video (decoders: eatgq )
    
 D.V.L. tgv                  Electronic Arts TGV video (decoders: eatgv )
    
 D.V.L. theora               Theora
    
 D.VIL. thp                  Nintendo Gamecube THP video
    
 D.V.L. tiertexseqvideo      Tiertex Limited SEQ video
    
 DEVI.S tiff                 TIFF image
    
 D.VIL. tmv                  8088flex TMV
    
 D.V.L. tqi                  Electronic Arts TQI video (decoders: eatqi )
    
 D.V.L. truemotion1          Duck TrueMotion 1.0
    
 D.V.L. truemotion2          Duck TrueMotion 2.0
    
 D.V..S tscc                 TechSmith Screen Capture Codec (decoders: camtasia )
    
 D.V.L. tscc2                TechSmith Screen Codec 2
    
 D.VIL. txd                  Renderware TXD (TeXture Dictionary) image
    
 D.V.L. ulti                 IBM UltiMotion (decoders: ultimotion )
    
 DEVI.S utvideo              Ut Video
    
 DEVI.S v210                 Uncompressed 4:2:2 10-bit
    
 D.VI.S v210x                
    
 DEVI.. v308                 Uncompressed packed 4:4:4
    
 DEVI.. v408                 Uncompressed packed QT 4:4:4:4
    
 DEVI.S v410                 Uncompressed 4:4:4 10-bit
    
 D.V.L. vb                   Beam Software VB
    
 D.VI.S vble                 VBLE Lossless Codec
    
 D.V.L. vc1                  SMPTE VC-1
    
 D.V.L. vc1image             Windows Media Video 9 Image v2
    
 D.VIL. vcr1                 ATI VCR1
    
 D.VIL. vixl                 Miro VideoXL (decoders: xl )
    
 D.V.L. vmdvideo             Sierra VMD video
    
 D.V..S vmnc                 VMware Screen Codec / VMware Video
    
 D.V.L. vp3                  On2 VP3
    
 D.V.L. vp5                  On2 VP5
    
 D.V.L. vp6                  On2 VP6
    
 D.V.L. vp6a                 On2 VP6 (Flash version, with alpha channel)
    
 D.V.L. vp6f                 On2 VP6 (Flash version)
    
 DEV.L. vp8                  On2 VP8 (decoders: vp8 libvpx ) (encoders: libvpx )
    
 DEV.L. vp9                  Google VP9 (decoders: vp9 libvpx-vp9 ) (encoders: libvpx-vp9 )
    
 D.VILS webp                 WebP
    
 DEV.L. wmv1                 Windows Media Video 7
    
 DEV.L. wmv2                 Windows Media Video 8
    
 D.V.L. wmv3                 Windows Media Video 9
    
 D.V.L. wmv3image            Windows Media Video 9 Image
    
 D.VIL. wnv1                 Winnov WNV1
    
 D.V.L. ws_vqa               Westwood Studios VQA (Vector Quantized Animation) video (decoders: vqavideo )
    
 D.V.L. xan_wc3              Wing Commander III / Xan
    
 D.V.L. xan_wc4              Wing Commander IV / Xxan
    
 D.VI.. xbin                 eXtended BINary text
    
 DEVI.S xbm                  XBM (X BitMap) image
    
 DEVIL. xface                X-face image
    
 DEVI.S xwd                  XWD (X Window Dump) image
    
 DEVI.. y41p                 Uncompressed YUV 4:1:1 12-bit
    
 D.V.L. yop                  Psygnosis YOP Video
    
 DEVI.. yuv4                 Uncompressed packed 4:2:0
    
 D.V..S zerocodec            ZeroCodec Lossless Video
    
 DEVI.S zlib                 LCL (LossLess Codec Library) ZLIB
    
 DEV..S zmbv                 Zip Motion Blocks Video
    
 D.A.L. 8svx_exp             8SVX exponential
    
 D.A.L. 8svx_fib             8SVX fibonacci
    
 DEA.L. aac                  AAC (Advanced Audio Coding) (decoders: aac libfdk_aac ) (encoders: aac libfdk_aac )
    
 D.A.L. aac_latm             AAC LATM (Advanced Audio Coding LATM syntax)
    
 DEA.L. ac3                  ATSC A/52A (AC-3) (encoders: ac3 ac3_fixed )
    
 D.A.L. adpcm_4xm            ADPCM 4X Movie
    
 DEA.L. adpcm_adx            SEGA CRI ADX ADPCM
    
 D.A.L. adpcm_afc            ADPCM Nintendo Gamecube AFC
    
 D.A.L. adpcm_ct             ADPCM Creative Technology
    
 D.A.L. adpcm_dtk            ADPCM Nintendo Gamecube DTK
    
 D.A.L. adpcm_ea             ADPCM Electronic Arts
    
 D.A.L. adpcm_ea_maxis_xa    ADPCM Electronic Arts Maxis CDROM XA
    
 D.A.L. adpcm_ea_r1          ADPCM Electronic Arts R1
    
 D.A.L. adpcm_ea_r2          ADPCM Electronic Arts R2
    
 D.A.L. adpcm_ea_r3          ADPCM Electronic Arts R3
    
 D.A.L. adpcm_ea_xas         ADPCM Electronic Arts XAS
    
 DEA.L. adpcm_g722           G.722 ADPCM (decoders: g722 ) (encoders: g722 )
    
 DEA.L. adpcm_g726           G.726 ADPCM (decoders: g726 ) (encoders: g726 )
    
 D.A.L. adpcm_g726le         G.726 ADPCM little-endian (decoders: g726le )
    
 D.A.L. adpcm_ima_amv        ADPCM IMA AMV
    
 D.A.L. adpcm_ima_apc        ADPCM IMA CRYO APC
    
 D.A.L. adpcm_ima_dk3        ADPCM IMA Duck DK3
    
 D.A.L. adpcm_ima_dk4        ADPCM IMA Duck DK4
    
 D.A.L. adpcm_ima_ea_eacs    ADPCM IMA Electronic Arts EACS
    
 D.A.L. adpcm_ima_ea_sead    ADPCM IMA Electronic Arts SEAD
    
 D.A.L. adpcm_ima_iss        ADPCM IMA Funcom ISS
    
 D.A.L. adpcm_ima_oki        ADPCM IMA Dialogic OKI
    
 DEA.L. adpcm_ima_qt         ADPCM IMA QuickTime
    
 D.A.L. adpcm_ima_rad        ADPCM IMA Radical
    
 D.A.L. adpcm_ima_smjpeg     ADPCM IMA Loki SDL MJPEG
    
 DEA.L. adpcm_ima_wav        ADPCM IMA WAV
    
 D.A.L. adpcm_ima_ws         ADPCM IMA Westwood
    
 DEA.L. adpcm_ms             ADPCM Microsoft
    
 D.A.L. adpcm_sbpro_2        ADPCM Sound Blaster Pro 2-bit
    
 D.A.L. adpcm_sbpro_3        ADPCM Sound Blaster Pro 2.6-bit
    
 D.A.L. adpcm_sbpro_4        ADPCM Sound Blaster Pro 4-bit
    
 DEA.L. adpcm_swf            ADPCM Shockwave Flash
    
 D.A.L. adpcm_thp            ADPCM Nintendo Gamecube THP
    
 D.A.L. adpcm_xa             ADPCM CDROM XA
    
 DEA.L. adpcm_yamaha         ADPCM Yamaha
    
 DEA..S alac                 ALAC (Apple Lossless Audio Codec)
    
 D.A.L. amr_nb               AMR-NB (Adaptive Multi-Rate NarrowBand) (decoders: amrnb )
    
 D.A.L. amr_wb               AMR-WB (Adaptive Multi-Rate WideBand) (decoders: amrwb )
    
 D.A..S ape                  Monkey's Audio
    
 D.A.L. atrac1               ATRAC1 (Adaptive TRansform Acoustic Coding)
    
 D.A.L. atrac3               ATRAC3 (Adaptive TRansform Acoustic Coding 3)
    
 ..A.L. atrac3p              ATRAC3+ (Adaptive TRansform Acoustic Coding 3+)
    
 D.A.L. binkaudio_dct        Bink Audio (DCT)
    
 D.A.L. binkaudio_rdft       Bink Audio (RDFT)
    
 D.A.L. bmv_audio            Discworld II BMV audio
    
 ..A.L. celt                 Constrained Energy Lapped Transform (CELT)
    
 DEA.L. comfortnoise         RFC 3389 Comfort Noise
    
 D.A.L. cook                 Cook / Cooker / Gecko (RealAudio G2)
    
 D.A.L. dsicinaudio          Delphine Software International CIN audio
    
 DEA.LS dts                  DCA (DTS Coherent Acoustics) (decoders: dca ) (encoders: dca )
    
 ..A.L. dvaudio              
    
 DEA.L. eac3                 ATSC A/52B (AC-3, E-AC-3)
    
 D.A.L. evrc                 EVRC (Enhanced Variable Rate Codec)
    
 DEA..S flac                 FLAC (Free Lossless Audio Codec)
    
 DEA.L. g723_1               G.723.1
    
 D.A.L. g729                 G.729
    
 D.A.L. gsm                  GSM
    
 D.A.L. gsm_ms               GSM Microsoft variant
    
 D.A.L. iac                  IAC (Indeo Audio Coder)
    
 ..A.L. ilbc                 iLBC (Internet Low Bitrate Codec)
    
 D.A.L. imc                  IMC (Intel Music Coder)
    
 D.A.L. interplay_dpcm       DPCM Interplay
    
 D.A.L. mace3                MACE (Macintosh Audio Compression/Expansion) 3:1
    
 D.A.L. mace6                MACE (Macintosh Audio Compression/Expansion) 6:1
    
 D.A.L. metasound            Voxware MetaSound
    
 D.A..S mlp                  MLP (Meridian Lossless Packing)
    
 D.A.L. mp1                  MP1 (MPEG audio layer 1) (decoders: mp1 mp1float )
    
 DEA.L. mp2                  MP2 (MPEG audio layer 2) (decoders: mp2 mp2float )
    
 DEA.L. mp3                  MP3 (MPEG audio layer 3) (decoders: mp3 mp3float ) (encoders: libmp3lame )
    
 D.A.L. mp3adu               ADU (Application Data Unit) MP3 (MPEG audio layer 3) (decoders: mp3adu mp3adufloat )
    
 D.A.L. mp3on4               MP3onMP4 (decoders: mp3on4 mp3on4float )
    
 D.A..S mp4als               MPEG-4 Audio Lossless Coding (ALS) (decoders: als )
    
 D.A.L. musepack7            Musepack SV7 (decoders: mpc7 )
    
 D.A.L. musepack8            Musepack SV8 (decoders: mpc8 )
    
 DEA.L. nellymoser           Nellymoser Asao
    
 DEA.L. opus                 Opus (Opus Interactive Audio Codec) (decoders: libopus ) (encoders: libopus )
    
 D.A.L. paf_audio            Amazing Studio Packed Animation File Audio
    
 DEA.L. pcm_alaw             PCM A-law / G.711 A-law
    
 D.A..S pcm_bluray           PCM signed 16|20|24-bit big-endian for Blu-ray media
    
 D.A..S pcm_dvd              PCM signed 20|24-bit big-endian
    
 DEA..S pcm_f32be            PCM 32-bit floating point big-endian
    
 DEA..S pcm_f32le            PCM 32-bit floating point little-endian
    
 DEA..S pcm_f64be            PCM 64-bit floating point big-endian
    
 DEA..S pcm_f64le            PCM 64-bit floating point little-endian
    
 D.A..S pcm_lxf              PCM signed 20-bit little-endian planar
    
 DEA.L. pcm_mulaw            PCM mu-law / G.711 mu-law
    
 DEA..S pcm_s16be            PCM signed 16-bit big-endian
    
 DEA..S pcm_s16be_planar     PCM signed 16-bit big-endian planar
    
 DEA..S pcm_s16le            PCM signed 16-bit little-endian
    
 DEA..S pcm_s16le_planar     PCM signed 16-bit little-endian planar
    
 DEA..S pcm_s24be            PCM signed 24-bit big-endian
    
 DEA..S pcm_s24daud          PCM D-Cinema audio signed 24-bit
    
 DEA..S pcm_s24le            PCM signed 24-bit little-endian
    
 DEA..S pcm_s24le_planar     PCM signed 24-bit little-endian planar
    
 DEA..S pcm_s32be            PCM signed 32-bit big-endian
    
 DEA..S pcm_s32le            PCM signed 32-bit little-endian
    
 DEA..S pcm_s32le_planar     PCM signed 32-bit little-endian planar
    
 DEA..S pcm_s8               PCM signed 8-bit
    
 DEA..S pcm_s8_planar        PCM signed 8-bit planar
    
 DEA..S pcm_u16be            PCM unsigned 16-bit big-endian
    
 DEA..S pcm_u16le            PCM unsigned 16-bit little-endian
    
 DEA..S pcm_u24be            PCM unsigned 24-bit big-endian
    
 DEA..S pcm_u24le            PCM unsigned 24-bit little-endian
    
 DEA..S pcm_u32be            PCM unsigned 32-bit big-endian
    
 DEA..S pcm_u32le            PCM unsigned 32-bit little-endian
    
 DEA..S pcm_u8               PCM unsigned 8-bit
    
 D.A.L. pcm_zork             PCM Zork
    
 D.A.L. qcelp                QCELP / PureVoice
    
 D.A.L. qdm2                 QDesign Music Codec 2
    
 ..A.L. qdmc                 QDesign Music
    
 DEA.L. ra_144               RealAudio 1.0 (14.4K) (decoders: real_144 ) (encoders: real_144 )
    
 D.A.L. ra_288               RealAudio 2.0 (28.8K) (decoders: real_288 )
    
 D.A..S ralf                 RealAudio Lossless
    
 DEA.L. roq_dpcm             DPCM id RoQ
    
 DEA..S s302m                SMPTE 302M
    
 D.A..S shorten              Shorten
    
 D.A.L. sipr                 RealAudio SIPR / ACELP.NET
    
 D.A.L. smackaudio           Smacker audio (decoders: smackaud )
    
 ..A.L. smv                  SMV (Selectable Mode Vocoder)
    
 D.A.L. sol_dpcm             DPCM Sol
    
 DEA... sonic                Sonic
    
 .EA... sonicls              Sonic lossless
    
 ..A.L. speex                Speex
    
 D.A..S tak                  TAK (Tom's lossless Audio Kompressor)
    
 D.A..S truehd               TrueHD
    
 D.A.L. truespeech           DSP Group TrueSpeech
    
 DEA..S tta                  TTA (True Audio)
    
 D.A.L. twinvq               VQF TwinVQ
    
 D.A.L. vima                 LucasArts VIMA audio
    
 D.A.L. vmdaudio             Sierra VMD audio
    
 DEA.L. vorbis               Vorbis (decoders: vorbis libvorbis ) (encoders: vorbis libvorbis )
    
 ..A.L. voxware              Voxware RT29 Metasound
    
 D.A... wavesynth            Wave synthesis pseudo-codec
    
 DEA.LS wavpack              WavPack
    
 D.A.L. westwood_snd1        Westwood Audio (SND1) (decoders: ws_snd1 )
    
 D.A..S wmalossless          Windows Media Audio Lossless
    
 D.A.L. wmapro               Windows Media Audio 9 Professional
    
 DEA.L. wmav1                Windows Media Audio 1
    
 DEA.L. wmav2                Windows Media Audio 2
    
 D.A.L. wmavoice             Windows Media Audio Voice
    
 D.A.L. xan_dpcm             DPCM Xan
    
 ..D... dvd_nav_packet       DVD Nav packet
    
 ..D... klv                  SMPTE 336M Key-Length-Value (KLV) metadata
    
 DES... ass                  ASS (Advanced SSA) subtitle
    
 DES... dvb_subtitle         DVB subtitles (decoders: dvbsub ) (encoders: dvbsub )
    
 ..S... dvb_teletext         DVB teletext
    
 DES... dvd_subtitle         DVD subtitles (decoders: dvdsub ) (encoders: dvdsub )
    
 ..S... eia_608              EIA-608 closed captions
    
 D.S... hdmv_pgs_subtitle    HDMV Presentation Graphic Stream subtitles (decoders: pgssub )
    
 D.S... jacosub              JACOsub subtitle
    
 D.S... microdvd             MicroDVD subtitle
    
 DES... mov_text             MOV text
    
 D.S... mpl2                 MPL2 subtitle
    
 D.S... pjs                  PJS (Phoenix Japanimation Society) subtitle
    
 D.S... realtext             RealText subtitle
    
 D.S... sami                 SAMI subtitle
    
 DES... srt                  SubRip subtitle with embedded timing
    
 DES... ssa                  SSA (SubStation Alpha) subtitle
    
 DES... subrip               SubRip subtitle
    
 D.S... subviewer            SubViewer subtitle
    
 D.S... subviewer1           SubViewer v1 subtitle
    
 D.S... text                 raw UTF-8 text
    
 D.S... vplayer              VPlayer subtitle
    
 D.S... webvtt               WebVTT subtitle
    
 DES... xsub                 XSUB

  • On ALAC’s Open Sourcing

    1er novembre 2011, par Multimedia Mike — Codec Technology

    Apple open sourced their lossless audio codec last week. Pretty awesome ! I have a theory that, given enough time, absolutely every codec will be open source in one way or another.

    I know I shouldn’t bother reading internet conversation around any news related to multimedia technology. And if I do read it, I shouldn’t waste any effort getting annoyed about them. But here are some general corrections :

    • ALAC is not in the same league as — nor is it a suitable replacement for — MP3/AAC/Vorbis or any other commonly used perceptual audio codec. It’s not a matter of better or worse ; they’re just different families of codecs designed for different purposes.
    • Apple open sourced ALAC, not AAC– easy mistake, though there’s nothing to ‘open source’ about AAC (though people can, and will, argue about its absolute ‘open-ness’).
    • There’s not much technical room to argue between ALAC and FLAC, the leading open source lossless audio compressor. Both perform similarly in terms of codec speeds (screamingly fast) and compression efficiency (results vary slightly depending on source material).
    • Perhaps the most frustrating facet is the blithe ignorance about ALAC’s current open source status. While this event simply added an official “open source” status to the codec, ALAC has effectively been open source for a very long time. According to my notes, the ALAC decoding algorithm was reverse engineered in 2005 and added into FFmpeg in March of the same year. Then in 2008, Google — through their Summer of Code program — sponsored an open source ALAC encoder.

    From the multimedia-savvy who are versed in these concepts, the conversation revolves around which would win in a fight, ALAC or FLAC ? And who between Apple and FFmpeg/Libav has a faster ALAC decoder ? The faster and more efficient ALAC encoder ? I contend that these issues don’t really matter. If you have any experience working with lossless audio encoders, you know that they tend to be ridiculously fast to both encode and decode and that many different lossless codecs compress at roughly the same ratios.

    As for which encoder is the fastest : use whatever encoder is handiest and most familiar, either iTunes or FFmpeg/Libav.

    As for whether to use FLAC or ALAC — if you’ve already been using one or the other for years, keep on using it. Support isn’t going to vanish. If you’re deciding which to use for a new project, again, perhaps choose based on software you’re already familiar with. Also, consider hardware support– ALAC enjoys iPod support, FLAC is probably better supported in a variety of non-iPod devices, though that may change going forward due to this open sourcing event.

    For my part, I’m just ecstatic that the question of moral superiority based on open source status has been removed from the equation.

    Code-wise, I’m interested in studying the official ALAC code to see if it has any corner-case modes that the existing open source decoders don’t yet account for. The source makes mention of multichannel (i.e., greater than stereo) configurations, but I don’t know if that’s in FFmpeg/Libav.

Navigation