ffmpeg.md 1.8 KB

ffmpeg

๋น„๋””์˜ค ๋ณ€ํ™˜ ๋„๊ตฌ. ๋” ๋งŽ์€ ์ •๋ณด: https://ffmpeg.org.

  • ๋น„๋””์˜ค์—์„œ ์‚ฌ์šด๋“œ๋ฅผ ์ถ”์ถœํ•˜์—ฌ MP3๋กœ ์ €์žฅ:

ffmpeg -i {{๊ฒฝ๋กœ/๋Œ€์ƒ/๋น„๋””์˜ค.mp4}} -vn {{๊ฒฝ๋กœ/๋Œ€์ƒ/์†Œ๋ฆฌ.mp3}}

  • FLAC ํŒŒ์ผ์„ Red Book CD ํ˜•์‹ (44100kHz, 16bit)์œผ๋กœ ํŠธ๋žœ์Šค์ฝ”๋”ฉ:

ffmpeg -i {{๊ฒฝ๋กœ/๋Œ€์ƒ/์ž…๋ ฅ_์†Œ๋ฆฌ.flac}} -ar 44100 -sample_fmt s16 {{๊ฒฝ๋กœ/๋Œ€์ƒ/์ถœ๋ ฅ_์†Œ๋ฆฌ.wav}}

  • ๋น„๋””์˜ค๋ฅผ GIF๋กœ ์ €์žฅํ•˜๊ณ , ๋†’์ด๋ฅผ 1000px๋กœ ์กฐ์ •ํ•˜๊ณ  ํ”„๋ ˆ์ž„ ์†๋„๋ฅผ 15๋กœ ์„ค์ •:

ffmpeg -i {{๊ฒฝ๋กœ/๋Œ€์ƒ/๋น„๋””์˜ค.mp4}} -vf 'scale=-1:{{1000}}' -r {{15}} {{path/to/output.gif}}

  • ๋ฒˆํ˜ธ๊ฐ€ ๋งค๊ฒจ์ง„ ์ด๋ฏธ์ง€ (frame_1.jpg, frame_2.jpg, etc) ๋ฅผ ๋น„๋””์˜ค ๋˜๋Š” GIF๋กœ ๊ฒฐํ•ฉ:

ffmpeg -i {{๊ฒฝ๋กœ/๋Œ€์ƒ/ํ”„๋ ˆ์ž„_%d.jpg}} -f image2 {{video.mpg|video.gif}}

  • ์ฃผ์–ด์ง„ ์‹œ์ž‘ ์‹œ๊ฐ„ mm:ss๋ถ€ํ„ฐ ์ข…๋ฃŒ ์‹œ๊ฐ„ mm2:ss2๊นŒ์ง€ ๋น„๋””์˜ค๋ฅผ ํŽธ์ง‘ (๋๊นŒ์ง€ ๋‹ค๋“ฌ์œผ๋ ค๋ฉด -to ํ”Œ๋ž˜๊ทธ ์ƒ๋žต):

ffmpeg -i {{๊ฒฝ๋กœ/๋Œ€์ƒ/์ž…๋ ฅ_๋น„๋””์˜ค.mp4}} -ss {{mm:ss}} -to {{mm2:ss2}} -codec copy {{๊ฒฝ๋กœ/๋Œ€์ƒ/์ถœ๋ ฅ_๋น„๋””์˜ค.mp4}}

  • AVI ๋น„๋””์˜ค๋ฅผ MP4๋กœ ๋ณ€ํ™˜. AAC ์˜ค๋””์˜ค @ 128kbit, h264 Video @ CRF 23:

ffmpeg -i {{๊ฒฝ๋กœ/๋Œ€์ƒ/์ž…๋ ฅ_๋น„๋””์˜ค}}.avi -codec:a aac -b:a 128k -codec:v libx264 -crf 23 {{๊ฒฝ๋กœ/๋Œ€์ƒ/์ถœ๋ ฅ_๋น„๋””์˜ค}}.mp4

  • ์˜ค๋””์˜ค ๋˜๋Š” ๋น„๋””์˜ค ์ŠคํŠธ๋ฆผ์„ ๋‹ค์‹œ ์ธ์ฝ”๋”ฉํ•˜์ง€ ์•Š๊ณ  MKV ๋น„๋””์˜ค๋ฅผ MP4๋กœ ๋ฆฌ๋จน์‹ฑ:

ffmpeg -i {{๊ฒฝ๋กœ/๋Œ€์ƒ/์ž…๋ ฅ_๋น„๋””์˜ค}}.mkv -codec copy {{๊ฒฝ๋กœ/๋Œ€์ƒ/์ถœ๋ ฅ_๋น„๋””์˜ค}}.mp4

  • MP4 ๋น„๋””์˜ค๋ฅผ VP9 ์ฝ”๋ฑ์œผ๋กœ ๋ณ€ํ™˜. ์ตœ์ƒ์˜ ํ’ˆ์งˆ์„ ์œ„ํ•ด์„œ๋Š”, CRF ๊ฐ’(๊ถŒ์žฅ ๋ฒ”์œ„ 15-35)์„ ์‚ฌ์šฉํ•˜๊ณ  -b:v๋Š” 0์ด์–ด์•ผ ํ•จ:

ffmpeg -i {{๊ฒฝ๋กœ/๋Œ€์ƒ/์ž…๋ ฅ_๋น„๋””์˜ค}}.mp4 -codec:v libvpx-vp9 -crf {{30}} -b:v 0 -codec:a libopus -vbr on -threads {{์Šค๋ ˆ๋“œ_์ˆ˜}} {{๊ฒฝ๋กœ/๋Œ€์ƒ/์ถœ๋ ฅ_๋น„๋””์˜ค}}.webm