级别: 骑士
- 注册时间:
- 2008-10-06
- 在线时间:
- 115小时
- 发帖:
- 319
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qtaac有名为"mode"的opt，faac没有。要么换qtaac，要么把--aextraopt mode=cbr去掉。在指定了--abitrate的情况下默认会自动转成abr的。aextraopt的用法倒是没问题，就是--aextraopt xxx=param这样用的。 另外2120+630的build内32位版可以用qtaac，只不过一时失误没显示出来qtaac的help，需要的看下面： - * qtaac encoder help
- --aquality VBR quality [63]
- Cannot be used for HE-AAC and possible values are:
- 0, 9 ,18 ,27 ,36 ,45 ,54 ,63 ,73, 82, 91, 100, 109, 118, 127
- 0 is lowest and 127 is highest.
- --abitrate Enables bitrate mode
- Bitrate should be one of the discrete preset values depending on
- profile, channels count, and samplerate.
- Examples for typical configurations
- - for 44100Hz or 48000Hz with 1ch
- LC: 32, 40, 48, 56, 64, 72, 80, 96, 112, 128, 144, 160, 192, 224, 256
- HE: 16, 24, 32, 40
- - for 44100Hz or 48000Hz with 2ch
- LC: 64, 72, 80, 96, 112, 128, 144, 160, 192, 224, 256, 288, 320
- HE: 32, 40, 48, 56, 64, 80
- - for 44100Hz or 48000Hz with 5.1ch
- LC: 160, 192, 224, 256, 288, 320, 384, 448, 512, 576, 640, 768
- HE: 80, 96, 112, 128, 160, 192
- The lower samplerate, the lower min/max values are applied
- --asamplerate Output samplerate
- LC: 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000
- HE: 32000, 44100, 48000
- Samplerate greater than input is not supported
- --acodec-quality Encoder's internal complexity [0]
- 0 (medium), 1 (high), 2 (highest)
- --aextraopt Profile and bitrate mode
- sbr : enable HE-AAC encoding [0]
- mode : bitrate control mode [abr]
- "abr", "cbr", "cvbr"
- --aquality/--abitrate setting may be changed inside codec due to its
- limitations and extreme resampling settings (e.g. 48000->8000) may not work.
- If something goes wrong, it will result in a failure of codec initialization.
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