It does. M4A是存放AAC或ALACA音频的MP4集装箱,iTunes和苹果音乐文件默认值。. Matching inputs take a fast, lossless path; mismatched ones have to be reconciled to a common format, which is slower and costs one encode.
是的:free accounts process audio up to 15 MB per file, which at typical bitrates is several hours of material; ffmpeg does the decoding and encoding, exactly as it would on a desktop。这是网站在视频之后最慷慨的上限, 音频工作很少能进入它。
