ffmpeg任意格式转码为M4A
$ffmpeg = 'bin/ffmpeg-2.8-64bit-static/ffmpeg';$neroAacEnc = 'bin/NeroAACCodec-1.5.1/linux/neroAacEnc';$input = "a.mp3";$rate = 320000;$output = "{$input}.m4a";$command = "{$ffmpeg} -vn -loglevel
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$ffmpeg = 'bin/ffmpeg-2.8-64bit-static/ffmpeg';
$neroAacEnc = 'bin/NeroAACCodec-1.5.1/linux/neroAacEnc';
$input = "a.mp3";
$rate = 320000;
$output = "{$input}.m4a";
$command = "{$ffmpeg} -vn -loglevel error -i {$input} -f wav - | {$neroAacEnc} -br {$rate} -ignorelength -if - -of {$output}";
exec($command, $message);
if (empty($message))
{
//逻辑
}
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