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FFmpeg

lossless cut video​

ffmpeg -i video.mp4 -codec: copy -ss 00:00:00 -t 00:00:30 output.mp4

VP9 (webm)​

ffmpeg.exe -i "in.mov" -speed 2 -c:v libvpx-vp9 -b:v 4M "out.webm"

macOS GPU acceleration​

ffmpeg -i in.mp4 -c:v h264_videotoolbox -c:a copy -vf scale=1280:720 -b:v 2000k out.mp4

to HLS​

ffmpeg -i video.mp4 -codec: copy -start_number 0 -hls_time 10 -hls_list_size 0 -f hls output/output.m3u8

FLAC to ALAC (https://www.reddit.com/r/AppleMusic/comments/wnrsc1/what_is_a_good_flac_to_alac_converter/)​

ffmpeg -i track.flac -acodec alac track.m4a

Batch cmd​

FLAC to ALAC​

for f in *.flac; do ffmpeg -i "$f" -acodec alac "${f%.flac}.m4a"; done