Introduction
FFmpeg is a free and open-source project consisting of a vast software suite of libraries and programs for handling video, audio, and other multimedia files and streams. It can be used to record, convert and stream audio and video.
Usage for Online Video Stream
Command:
ffmpeg -i "URL_FOR_m3u8_FILE" -bsf:a aac_adtstoasc -vcodec copy -c copy -crf 50 LOCAL_FILENAME.mp4
Explanation:
-bsf:a aac_adtstoasc
bsf = (bit stream filter)
use aac_adtstoasc bsf for a audio streams, this is need if .m3u8 file consists with .ts files and output is .mp4
reference https://ffmpeg.org/ffmpeg-bitstream-filters.html#aac_005fadtstoasc
-c copy -vcodec copy
skip codec (encode and decode), for demuxing and muxing
for video stream, using H.264 codec.
reference https://ffmpeg.org/ffmpeg.html#Stream-copy
-crf 50
0 is lossless, 23 is the default, and 51 is worst quality
reference https://trac.ffmpeg.org/wiki/Encode/H.264#CRFExample
Summary
This is just a note for myself. If you want to know more about this tool, search it on its official website. I bet you will like it.
References
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