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• Automatic save Printscreen video

  18 février 2014, par Erik Van de Ven

  I would like to save a screenshot of a video, as thumbnail image, as soon as someone uploads a video. They told me this is only possible on Windows servers. But now I read something about http://www.ffmpeg.org/download.html. It looks like it creates the possibility to do the same on Linux, is that possible ?
  And does someone have experience with this ?

• ffmpeg how convert audio files in other formats ?

  21 septembre 2012, par John Smith

  I download audio file and me need convert him on formats .mp3,.wav,.ogg.,acc.
  My script :

  if($ext=='wav'){
  
      shell_exec("ffmpeg -i $infile -acodec libmp3lame -ab 320 $outfile_mp3");
  
      shell_exec("ffmpeg -i $infile -acodec libvorbis -ab 320 $outfile_ogg");
  
      shell_exec("ffmpeg -i $infile -acodec libfaac -ab 320 $outfile_aac");
  
  }
  
  elseif($ext=='mp3'){
  
      shell_exec("ffmpeg -i $infile -ab 256 $outfile_wav");
  
      shell_exec("ffmpeg -i $infile -ab 256 $outfile_ogg");
  
      shell_exec("ffmpeg -i $infile -ab 256 $outfile_aac");
  
      move_uploaded_file($tmp, $path.$name2.'mp3');
  
  }
  
  elseif($ext=='ogg'){
  
      shell_exec("ffmpeg -i $infile -acodec libmp3lame $outfile_mp3");
  
      shell_exec("ffmpeg -i $infile $outfile_wav");
  
      shell_exec("ffmpeg -i $infile -acodec libfaac $outfile_aac");
  
  }
  
  elseif($ext=='aac'){
  
      shell_exec("ffmpeg -i $infile -acodec libmp3lame $outfile_mp3");
  
      shell_exec("ffmpeg -i $infile -acodec libvorbis $outfile_ogg");
  
      shell_exec("ffmpeg -i $infile -acodec libmp3lame $outfile_wav");
  
  }

  Help me please convert files :

  1. how convert file in format .mp3 in formats .wav, .ogg, .acc
  2. how convert file in format .wav in formats .mp3, .wav, .acc
  3. how convert file in format .ogg in formats .mp3, .ogg, .acc
  4. how convert file in format .acc in formats .mp3, .ogg, .wav

  I want to get good sound quality audio files...

• How to decode Full Rate GSM Audio file ?

  29 août 2012, par 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')