Mac osx ffmpeg aac

最新推荐文章于 2025-01-21 21:41:29 发布

转载最新推荐文章于 2025-01-21 21:41:29 发布 · 1k 阅读

MacOSX 专栏收录该内容

2 篇文章

订阅专栏

本文深入解析了FFmpeg命令用于音视频文件的转换与编码，包括使用不同参数实现Mono、Stereo音频格式，指定比特率、采样频率及线程数等操作。同时提供直接复制音频轨或转换为特定格式的方法。

# using libfaac on Mac OS X 10.6.8
# -vn : not copying video
# -acodec : specify codec used in flv file
# -ac : channels. 1 is for mono, 2 is for stereo
# -ab : specify bitrate for output file (note that rate is not kbps but bps)
# -ar : sampling frequency (Hz)
# -threads: number of threads for encoding
# "-strict experimental" is necessary to use libfaac
 
ffmpeg -y -i xxxxxxxxxxx.flv -vn -acodec aac -ac 2 -ab 128000 -ar 44100 -threads 4 -strict experimental xxxxx.m4a
 
# note that codec is 'libmp3lame'
ffmpeg -i xxxxxxxxxx.m4a -vn -acodec libmp3lame -ac 2 -ab 128 -ar 44100 -threads 4 -f mp3 zzzzzzzzzzz.mp3
 
# or you can directly convert audio track
ffmpeg -i xxxxxxxxxxx.flv -vn -acodec libmp3lame -ac 2 -ab 128000 -ar 44100 -threads 4 -f mp3  xxxxx.mp3
 
# for wav -acodec option is not necessary
ffmpeg -i xxxxxxxxxx.flv -vn -threads 4 -ac 1 -ar 44100 xxxxxx.wav
 
# for ogg
ffmpeg -i xxxxxxxxxx.flv -vn -threads 4 -acodec libvorbis -ac 2 -ar 44100 xxxxxxx.ogg
 
# 単純に音声をコピー
ffmpeg -i xxxxxxxxxx -vn -threads 4 -acodec copy output.filename

https://gist.github.com/ymotongpoo/1342656#file-gistfile1-sh-L1