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Only download audio from source mp4 link

原文 2018-01-25 01:24:24 6 1 audio/ video/ web/ encoding/ mp4

I want to be able to download just the audio track of an mp4 file from a source url, without actually having to first download the mp4 file and then extracting the audio. Is this possible? The motivation is that downloading the audio has much much smaller file size while downloading the video is a whole lot more.

1 answers

Yes, It is possible. Just download the moov atom, looks at the chunks/chunk offsets for the audio track. Download those ranges and repackage into a suitable container for the codec.

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Only download audio from source mp4 link

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1 answers

solution1 0 ACCPTED 2018-01-25 05:52:18

solution1
0 ACCPTED 2018-01-25 05:52:18