Changes between Version 26 and Version 27 of Encode/HighQualityAudio


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Timestamp:
Apr 13, 2013, 7:22:23 PM (5 years ago)
Author:
lithosza
Comment:

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  • Encode/HighQualityAudio

    v26 v27  
    140140 
    141141Please note that the bitrates listed here assumes the input audio channels is Stereo and the sample rate is >= 44.1Khz. Mono could require less bits.[[BR]] 
    142  
    143142- '''libopus''' Usable range >= 64Kbps. Recommended range '''>= 128Kbps'''[[BR]] 
    144143- '''libfdk_aac default LC-AAC profile.''' Recommended range '''(VBR level 3 to 5) or >= 128Kbps''' (http://ffmpeg.org/trac/ffmpeg/wiki/AACEncodingGuide). [[BR]] 
     
    163162The '''vorbis''', '''wmav1/wmav2''' and '''libvo_aacenc''' encoders are not worth using.[[BR]] 
    164163The '''wmav1/wmav2''' and '''libvo_aacenc''' encoders '''do not reach transparency at any bitrate'''.[[BR]] 
    165 The '''vorbis''' encoder does not use the bitrate specified in ffmpeg. On some samples it does sound reasonable, but the bitrate is very high.[[BR]] 
     164The '''vorbis''' encoder does not use the bitrate specified in ffmpeg. On some samples it does sound reasonable, but the bitrate is very high.[[BR]][[BR]] 
     165To calculate the bitrate to use for multi-channel audio: (bitrate for stereo) x (channels / 2).[[BR]] 
     166Example for 5.1(6 channels) Vorbis audio: 128Kbps x (6 / 2) = 384Kbps[[BR]] 
    166167---- 
    167168