将 mp3 转换为 iPhone 的 caf 文件
我正在尝试将mp3文件的采样率转换为caf格式。 afconvert -f caff -d LEI16@44100 ./friricatives_play_all.mp3 ./test.caf afconvert -f caff -d LEI16@22100 ./friricatives_play_all.mp3 ./test.caf afconvert -f caff -d LEI16@12000 ./friricatives_play_all.mp3 ./test.caf afconvert -f caff -d LEI16@20100 ./friricatives_play_all.mp3 ./test.caf afconvert -f caff -d LEI16@15100 ./friricatives_play_all.mp3 ./test.caf afconvert -f caff -d LEI16@14100 ./friricatives_play_all.mp3 ./test.caf afconvert -f caff -d LEI16@13100 ./friricatives_play_all.mp3 ./test.caf afconvert -f caff -d LEI16@44100 -c 1 ./friricatives_play_all.mp3 ./test.caf afconvert -f caff -d LEI16@13100 -c 1 ./friricatives_play_all.mp3 ./test.caf afconvert -f caff -d LEI16@22100 -c 1 ./test ./test2.caf
我使用了与上面不同的采样率来转换 mp3 文件 到咖啡馆文件。例如,对于 38.5 MB 文件:
采样率大小 15,100 72.6 MB 14,100 67.8 MB 13,100 63 MB
如您所见,文件大小随采样率降低而减小,但 质量逐渐下降。如果您能提供更多见解 解决这个问题,我真的很感激。
I am experimenting with the sampling rate of the mp3 file to convert it into caf format.
afconvert -f caff -d LEI16@44100 ./fricatives_play_all.mp3 ./test.caf
afconvert -f caff -d LEI16@22100 ./fricatives_play_all.mp3 ./test.caf
afconvert -f caff -d LEI16@12000 ./fricatives_play_all.mp3 ./test.caf
afconvert -f caff -d LEI16@20100 ./fricatives_play_all.mp3 ./test.caf
afconvert -f caff -d LEI16@15100 ./fricatives_play_all.mp3 ./test.caf
afconvert -f caff -d LEI16@14100 ./fricatives_play_all.mp3 ./test.caf
afconvert -f caff -d LEI16@13100 ./fricatives_play_all.mp3 ./test.caf
afconvert -f caff -d LEI16@44100 -c 1 ./fricatives_play_all.mp3 ./test.caf
afconvert -f caff -d LEI16@13100 -c 1 ./fricatives_play_all.mp3 ./test.caf
afconvert -f caff -d LEI16@22100 -c 1 ./test ./test2.caf
I have used different sampling rates as above for converting mp3 files
to caf files. For instance, for a 38.5 MB file :
Sampling Rate Size
15,100 72.6 MB
14,100 67.8 MB
13,100 63 MB
As you can see the file size reduces with the lower sampling rate but
the quality gradually decreases. If you could provide more insight
into this problem, I would really appreciate it.
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如果它是立体声文件,您可以将其转换为单声道。您还可以使用 IMA-4:1 压缩,这会将文件大小减少到 25%,但确实会稍微降低质量。
If it's a stereo file, you could convert it to mono. You can also use the IMA-4:1 compression, which reduces the file size to 25%, but it does reduce the quality somewhat.