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샤나인코더 4.0으로 webm vp9 코덱으로 인코딩하는 속도가 너무 느리길래 구글신에게 물어 봤더니, 매개변수에 저걸 추가해주면 빨라진다고 적혀 있더라구요.

-threads 8 -speed 4

에서 -threads 8 은 쓰레드 수가 8개라는 뜻이고,

-speed 4 는 가장 빠른 속도(4)로 인코딩 하겠다는 뜻이에요. -speed 0 이 가장 느리면서 좋은 화질 입니다.

 

덧붙임: -threads 8 로 설정해도 실제로 인코딩 해보시면 CPU 쓰레드 한개만 사용하는 문제점이 있더군요. 해결 방법을 모르겠습니다. 해결 방법을 알아낼 때 까지는 샤나인코더를 여러개 띄워놓고 여러 파일을 동시에 인코딩하는 방법 밖에는 없을 것 같아요. 

 

 

출처: https://sites.google.com/a/webmproject.org/wiki/ffmpeg/vp9-encoding-guide


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