Açıklaması şöyle
An audio format is basically defined by three different things: sample rate, bit depth and compression type. The compression type can be either lossless (WAV, PCM, FLAC, ALAC) or "lossy" (AAC, MP3, OGG, MQA, etc). Lossy compression works by shaping the quantization noise so it's masked by the remaining content and inaudible. Lossy formats are characterized by their bit-rate: the higher the bit-rate, the less quantization is done.
AAC Format
Açıklaması şöyle
aac files are just a "raw" audio stream, they do not support MP3-style tag embedding because AAC is meant to be used with a separate "wrapper" container format to carry those tags instead. Typically MP4 container files (.mp4 or .m4a) are used for AAC audio.
Örnek
m4a olarak yeniden paketlemek için şöyle yaparız
ffmpeg -i Foo.aac -c:a copy Foo.m4a
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