Single software to extract audios from most video formats? Best video

— Extract raw audio stream from video file without re-encoding —


        First we must determine the type of audio in the video wrapper, so we run:

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            | ==>   ffmpeg -i video.flv
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        FFMPEG reports this to the console:

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            | Duration: 00:03:20.20, start: 0.000000, bitrate: 704 kb/s
            | Stream #0:0: Video: h264 (Main), yuv420p, 480x360 [SAR 1:1 DAR 4:3], 616 kb/
            | s, 25 tbr, 1k tbn, 2k tbc
            | Stream #0:1: Audio: aac, 44100 Hz, stereo, fltp, 96 kb/s
            | At least one output file must be specified
            +-------------------------------------------------------

        The audio is aac, so now can we run our extraction command:

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            | ==>   ffmpeg -i video.flv -vn -acodec copy audio.aac
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