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• How to decode Full Rate GSM Audio file?

  29 August 2012, by AndroidLearner

  I have to decode a full rate gsm audio file. Full Rate GSM Audio file is decoded using libgsm. I have used MSVC++ with windows nightly builds of ffmpeg and libav but unable to decode file correctly. Can anyone tell me the reason? I have tried decoding using following codecs:

  /* various PCM "codecs" */
  
  AV_CODEC_ID_FIRST_AUDIO = 0x10000,
  
  AV_CODEC_ID_PCM_S16LE = 0x10000,
  
  AV_CODEC_ID_PCM_S16BE,
  
  AV_CODEC_ID_PCM_U16LE,
  
  AV_CODEC_ID_PCM_U16BE,
  
  AV_CODEC_ID_PCM_S8,
  
  AV_CODEC_ID_PCM_U8,
  
  AV_CODEC_ID_PCM_MULAW,
  
  AV_CODEC_ID_PCM_ALAW,
  
  AV_CODEC_ID_PCM_S32LE,
  
  AV_CODEC_ID_PCM_S32BE,
  
  AV_CODEC_ID_PCM_U32LE,
  
  AV_CODEC_ID_PCM_U32BE,
  
  AV_CODEC_ID_PCM_S24LE,
  
  AV_CODEC_ID_PCM_S24BE,
  
  AV_CODEC_ID_PCM_U24LE,
  
  AV_CODEC_ID_PCM_U24BE,
  
  AV_CODEC_ID_PCM_S24DAUD,
  
  AV_CODEC_ID_PCM_ZORK,
  
  AV_CODEC_ID_PCM_S16LE_PLANAR,
  
  AV_CODEC_ID_PCM_DVD,
  
  AV_CODEC_ID_PCM_F32BE,
  
  AV_CODEC_ID_PCM_F32LE,
  
  AV_CODEC_ID_PCM_F64BE,
  
  AV_CODEC_ID_PCM_F64LE,
  
  AV_CODEC_ID_PCM_BLURAY,
  
  AV_CODEC_ID_PCM_LXF,
  
  AV_CODEC_ID_S302M,
  
  AV_CODEC_ID_PCM_S8_PLANAR,
  
  
  
  /* various ADPCM codecs */
  
  AV_CODEC_ID_ADPCM_IMA_QT = 0x11000,
  
  AV_CODEC_ID_ADPCM_IMA_WAV,
  
  AV_CODEC_ID_ADPCM_IMA_DK3,
  
  AV_CODEC_ID_ADPCM_IMA_DK4,
  
  AV_CODEC_ID_ADPCM_IMA_WS,
  
  AV_CODEC_ID_ADPCM_IMA_SMJPEG,
  
  AV_CODEC_ID_ADPCM_MS,
  
  AV_CODEC_ID_ADPCM_4XM,
  
  AV_CODEC_ID_ADPCM_XA,
  
  AV_CODEC_ID_ADPCM_ADX,
  
  AV_CODEC_ID_ADPCM_EA,
  
  AV_CODEC_ID_ADPCM_G726,
  
  AV_CODEC_ID_ADPCM_CT,
  
  AV_CODEC_ID_ADPCM_SWF,
  
  AV_CODEC_ID_ADPCM_YAMAHA,
  
  AV_CODEC_ID_ADPCM_SBPRO_4,
  
  AV_CODEC_ID_ADPCM_SBPRO_3,
  
  AV_CODEC_ID_ADPCM_SBPRO_2,
  
  AV_CODEC_ID_ADPCM_THP,
  
  AV_CODEC_ID_ADPCM_IMA_AMV,
  
  AV_CODEC_ID_ADPCM_EA_R1,
  
  AV_CODEC_ID_ADPCM_EA_R3,
  
  AV_CODEC_ID_ADPCM_EA_R2,
  
  AV_CODEC_ID_ADPCM_IMA_EA_SEAD,
  
  AV_CODEC_ID_ADPCM_IMA_EA_EACS,
  
  AV_CODEC_ID_ADPCM_EA_XAS,
  
  AV_CODEC_ID_ADPCM_EA_MAXIS_XA,
  
  AV_CODEC_ID_ADPCM_IMA_ISS,
  
  AV_CODEC_ID_ADPCM_G722,
  
  AV_CODEC_ID_ADPCM_IMA_APC,
  
  AV_CODEC_ID_VIMA       = MKBETAG('V','I','M','A'),
  
  
  
  /* AMR */
  
  AV_CODEC_ID_AMR_NB = 0x12000,
  
  AV_CODEC_ID_AMR_WB,
  
  
  
  /* RealAudio codecs*/
  
  AV_CODEC_ID_RA_144 = 0x13000,
  
  AV_CODEC_ID_RA_288,
  
  
  
  /* various DPCM codecs */
  
  AV_CODEC_ID_ROQ_DPCM = 0x14000,
  
  AV_CODEC_ID_INTERPLAY_DPCM,
  
  AV_CODEC_ID_XAN_DPCM,
  
  AV_CODEC_ID_SOL_DPCM,
  
  
  
  /* audio codecs */
  
  AV_CODEC_ID_MP2 = 0x15000,
  
  AV_CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
  
  AV_CODEC_ID_AAC,
  
  AV_CODEC_ID_AC3,
  
  AV_CODEC_ID_DTS,
  
  AV_CODEC_ID_VORBIS,
  
  AV_CODEC_ID_DVAUDIO,
  
  AV_CODEC_ID_WMAV1,
  
  AV_CODEC_ID_WMAV2,
  
  AV_CODEC_ID_MACE3,
  
  AV_CODEC_ID_MACE6,
  
  AV_CODEC_ID_VMDAUDIO,
  
  AV_CODEC_ID_FLAC,
  
  AV_CODEC_ID_MP3ADU,
  
  AV_CODEC_ID_MP3ON4,
  
  AV_CODEC_ID_SHORTEN,
  
  AV_CODEC_ID_ALAC,
  
  AV_CODEC_ID_WESTWOOD_SND1,
  
  AV_CODEC_ID_GSM, ///< as in Berlin toast format
  
  AV_CODEC_ID_QDM2,
  
  AV_CODEC_ID_COOK,
  
  AV_CODEC_ID_TRUESPEECH,
  
  AV_CODEC_ID_TTA,
  
  AV_CODEC_ID_SMACKAUDIO,
  
  AV_CODEC_ID_QCELP,
  
  AV_CODEC_ID_WAVPACK,
  
  AV_CODEC_ID_DSICINAUDIO,
  
  AV_CODEC_ID_IMC,
  
  AV_CODEC_ID_MUSEPACK7,
  
  AV_CODEC_ID_MLP,
  
  AV_CODEC_ID_GSM_MS, /* as found in WAV */
  
  AV_CODEC_ID_ATRAC3,
  
  AV_CODEC_ID_VOXWARE,
  
  AV_CODEC_ID_APE,
  
  AV_CODEC_ID_NELLYMOSER,
  
  AV_CODEC_ID_MUSEPACK8,
  
  AV_CODEC_ID_SPEEX,
  
  AV_CODEC_ID_WMAVOICE,
  
  AV_CODEC_ID_WMAPRO,
  
  AV_CODEC_ID_WMALOSSLESS,
  
  AV_CODEC_ID_ATRAC3P,
  
  AV_CODEC_ID_EAC3,
  
  AV_CODEC_ID_SIPR,
  
  AV_CODEC_ID_MP1,
  
  AV_CODEC_ID_TWINVQ,
  
  AV_CODEC_ID_TRUEHD,
  
  AV_CODEC_ID_MP4ALS,
  
  AV_CODEC_ID_ATRAC1,
  
  AV_CODEC_ID_BINKAUDIO_RDFT,
  
  AV_CODEC_ID_BINKAUDIO_DCT,
  
  AV_CODEC_ID_AAC_LATM,
  
  AV_CODEC_ID_QDMC,
  
  AV_CODEC_ID_CELT,
  
  AV_CODEC_ID_G723_1,
  
  AV_CODEC_ID_G729,
  
  AV_CODEC_ID_8SVX_EXP,
  
  AV_CODEC_ID_8SVX_FIB,
  
  AV_CODEC_ID_BMV_AUDIO,
  
  AV_CODEC_ID_RALF,
  
  AV_CODEC_ID_IAC,
  
  AV_CODEC_ID_ILBC,
  
  AV_CODEC_ID_FFWAVESYNTH = MKBETAG('F','F','W','S'),
  
  AV_CODEC_ID_8SVX_RAW    = MKBETAG('8','S','V','X'),
  
  AV_CODEC_ID_SONIC       = MKBETAG('S','O','N','C'),
  
  AV_CODEC_ID_SONIC_LS    = MKBETAG('S','O','N','L'),
  
  AV_CODEC_ID_PAF_AUDIO   = MKBETAG('P','A','F','A'),
  
  AV_CODEC_ID_OPUS        = MKBETAG('O','P','U','S')

• mkv: Force the full parsing of mp3

  6 February 2016, by Luca Barbato

  mkv: Force the full parsing of mp3
  Some muxer might or might not fit incomplete mp3 frames in
  
  their packets.
  Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
  

  • [DBH] libavformat/matroskadec.c

• Do ffmpeg create thumbnail download all of file via URL nodejs?

  11 November 2019, by Nam Nguyễn

  I am creating a thumbnail from video URL by ffmpeg.

  This is my code:

  function createThumbnail(videoURL, keyFileThumb) {
  
      return new Promise((resolve, reject) => {
  
          let tmpFile = createWriteStream(`./${keyFileThumb}`)
  
          const ffmpeg = spawn(ffmpegPath, [
  
              '-ss',
  
              '00:00:01.000',
  
              '-i',
  
              videoURL,
  
              '-frames:v',
  
              '1',
  
              '-f',
  
              'image2',
  
              '-c:v',
  
              'mjpeg',
  
              'pipe:1'
  
          ])
  
  
  
          ffmpeg.stdout.pipe(tmpFile)
  
  
  
          ffmpeg.on('close', function (code) {
  
              tmpFile.end()
  
              resolve(code)
  
          })
  
  
  
          ffmpeg.on('error', function (err) {
  
              console.log(err)
  
              reject(err)
  
          })
  
      })
  
  }

  I just want to create thumbnail from stream video URL then disconnect. I do not want download all of file to generate thumbnail in few second of video.