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  • 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
  • doc : delete viterbi.txt

    10 novembre 2013, par Timothy Gu
    doc : delete viterbi.txt
    

    The description has been moved to the FFmpeg wiki :
    https://trac.ffmpeg.org/wiki/ViterbiAlgorithm

    Signed-off-by : Timothy Gu <timothygu99@gmail.com>

    • [DH] doc/viterbi.txt
  • Methods For Retaining State

    26 décembre 2011, par Multimedia Mike — General, evernote, organization

    I jump around between projects. A lot. Over the years, I have employed various methods for retaining state or context as I switch to a different project. Here’s a quick survey and a general classification of their effectiveness.

    Good

    • Evernote : This is a cloud-based note-taking service that has a web client, Mac and Windows clients, and clients for just about ever mobile platform out there. I have an account and access it via the web interface as as the Windows, iOS, and Android clients. I really like it.


    Okay

    • Series of text files : I have been doing this for a very long time. I have many little note-filled directories here and there that are consistently migrated to new machines but generally forgotten about. This isn’t a terrible method but can be unwieldy when you work on lots of different machines. I’m still tracking down all these directories and importing them into Evernote.

    Bad

    • Layout of desktop windows : I have a habit of working on one project in a set of windows on one desktop space and another project in a second set of windows in another space, etc. Oh, this makes me shudder just thinking about it, mostly because of living in constant fear of a power failure or some other inadvertent reset (darn you, default config’d Windows Update) that wipes the state clean (sure, all of the work might have been saved, but I was relying on those windows to be set up in just the right manner to remind me of all the things I was working on). These days, I force myself to reboot at least once a week so I can’t get too deep into this habit. When it’s time to change projects, I write up exactly what I was doing and where I left off and stick it in Evernote.
    • Open browser windows : I guess it’s common to have many, many tabs open in one’s web browser in this day and age. Like many, I use open tabs as a stack of items to read. The state problem comes when a few of the open tabs represent TODO items. Then I start living in fear that the browser might crash or be restarted in an unexpected way and I struggle to recall what 3-5 important TODO items were that I had opened in separate tabs (on top of a stack of less important items). Again, I try to shut down the browser frequently in order to break this tendency. TODO items are better filed in Evernote.
    • Unsaved data in a text editor : Okay, this is just sloppy on my part, shoving temporary data into a text editor window thinking it’s supremely ephemeral. The problem comes when it’s linked to one of the many tasks on my desktop that might be bumped down a few priority levels ; when finally returning to the context-free data, I’m at a loss to explain what it’s for. Evernote gets it, once more, with a more thorough description of what was going on.
    • Email inbox : I make an effort to ensure that my email inbox has the fewest number of messages possible. Once things are dealt with, they get filed away elsewhere. This implies that things in my inbox require action. Some things have a habit of hanging around, though. Longer items now get described in better detail and filed away in Evernote.
    • Classic paper : Thanks to Derek in the comments for reminding me of this one. Paper is a reliable standby but it can get unwieldy when Post-It Notes litter your work area. Further, it can be problematic when you have multiple physical work areas.
    • Shell history : Another method I rely on entirely too often. This is when I count on a recipe of command line incantations living on in the history buffer of my Unix shell (generally Bash). What sequence of git commands allowed me to do XYZ ? Let’s check the shell history– I sure hope it’s still in there.

    Conclusion
    I guess what I’m trying to say here is that I really like Evernote. If you have similar troubles with retaining state, try it out. I hear there are many other services similar to it with slightly varying feature sets (people rave about Microsoft OneNote). So there are plenty of options and something out there is surely a fit.

    Evernote has a free tier and a premium tier. For my meager note-taking needs, I don’t come anywhere close to the free tier’s limit but I decided to pay for a premium subscription simply because I feel like I derive so much value from the service.

    One downside, however, is that I seem to be doing a lot less blogging since I got on Evernote earlier this year (though it is where I author most of these posts nowadays ; I especially like that I have a notebook labeled “Posted” whose incrementing count reminds me that I am getting some stuff out there). I originally started this blog as a sort of technical journal in order to organize notes and projects in a central location. It’s strange to think that if Evernote existed in 2005, I might never have had a reason to start this blog.