Changes between Version 6 and Version 7 of Encode/MP3


Ignore:
Timestamp:
Jan 27, 2014, 8:18:22 PM (5 years ago)
Author:
rogerdpack
Comment:

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  • Encode/MP3

    v6 v7  
    2222|| -V 9 || 65 || 45...85 || -q:a 9
    2323
    24 In our example above, we selected `-qscale:a 2`, meaning we used LAME's option `-V2`, which gives us a VBR MP3 audio stream with an average stereo bitrate of 170-210 kBit/s.
     24In our example above, we selected `-qscale:a 2`, meaning we used LAME's option `-V 2`, which gives us a VBR MP3 audio stream with an average stereo bitrate of 170-210 kBit/s.
    2525
    2626= CBR Encoding =
     
    2828If you need constant bitrate (CBR) MP3 audio, you need to use the `-b:a` option instead of `-qscale:a`. Here you can specify the number of bits per second, for example `-b:a 256k` if you want 256 Kbit/s (25.6 KB/s) audio.
    2929
     30== Troubleshooting ==
     31
     32Sometimes it will give you *less* bits per second than you request.  If you're doing CBR, it could be because you chose a value "in between" its allowable settings (if defaults down to the next lower).  If you're doing VBR, it could be because the input itself is already in a lower bitrate than the requested, in which case, it basically just re-encodes it at the bitrate the input already was.
     33
     34
    3035== Also see ==
    3136* [http://ffmpeg.org/ffmpeg-codecs.html#libmp3lame-1 FFmpeg Codecs Documentation for libmp3lame]