如何将 web 的视频转换为 ffmpeg

Question

I am trying to rescale, subclip and convert video for web (html5 video tag). Target browsers: Chrome, Safari, Firefox, Ya Browser.

I am using command like that (changing some params)

ffmpeg -i C.mp4 -ss 00:00:00 -t 10 -vf scale=312x104 -vcodec libx264 -strict -2 -movflags faststart -pix_fmt yuv420p -profile:v high -level 3 -r 25 -an -sn -dn d.mp4 -y

But every time video is not playing in some browser.

I would like to find some way to do that task fast (that's why I am using ffmpeg) and stable (so that any video passed would give me a valid video for all browsers)

I also tried to play with setsar, setdar params, but still no success

Answer 1

Thanks everyone, I guess I found smth suitable for my case

Ffmpeg -i C.mp4 -ss 00:00:00 -t 10 -vf scale=dstw=312:dsth=104:flags=accurate_rnd,setdar=3/1 -vcodec libx264  -level 21 -refs 2 -pix_fmt yuv420p -profile:v high -level 3.1 -color_primaries 1 -color_trc 1 -colorspace 1 -movflags +faststart -r 30 -an -sn -dn d.mp4