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FFmpeg

lossless cut video​

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

to HLS​

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

HW​

macOS GPU acceleration​

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

intel GPU （QSV）​

# 8bit 视觉无损(色彩可能不足)
ffmpeg -hwaccel qsv -i 输入文件.mp4 \
  -c:v hevc_qsv \
  -preset slow \
  -global_quality 22 \
  -b:v 0 \
  -look_ahead 1 \
  -c:a aac -b:a 192k \
  -tag:v hvc1 \
  输出文件.mp4
# 10bit 视觉无损
ffmpeg -init_hw_device vaapi=va:/dev/dri/renderD128 \
  -init_hw_device qsv=hw@va \
  -filter_hw_device hw \
  -hwaccel qsv -hwaccel_output_format qsv \
  -i 输入文件.mp4 \
  -vf "scale_qsv=format=p010le" \
  -c:v hevc_qsv \
  -profile:v main10 \
  -preset slow \
  -global_quality 22 \
  -b:v 0 \
  -look_ahead 1 \
  -c:a aac -b:a 192k \
  -tag:v hvc1 \
  -movflags +faststart \
  输出文件.mp4

VP9 (webm)​

Deprecated

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

Audio​

FLAC to ALAC​

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

batch convert​

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