Question

1

FFmpeg multi pass encoding

rated 0 times [ 1] [ 0] / answers: 1 / hits: 4383 / 2 Years ago, wed, october 19, 2022, 1:53:50

Sorry, I am really new to this, and have problems doing some tasks without help.

So I have a terminal command:

ffmpeg 

-y 

-i '/media/levan/BEEA60D8EA608E89/Downloads/Videos/Tony Braxton - Un-Break My Heart.VOB' 

-s 1920x1080 

-aspect 16:9 

-r 25 

-b 15550k 

-bt 19792k 

-vcodec libtheora 

-acodec libvorbis 

-ac 2 

-ar 48000 

-ab 320k 

ddd.ogg

and I want to have 3 pass video in output video, but how do I accomplish this?

I found that I must write -pass n command some where, but where to write it I do not know. I tested this and wrote -pass 3 at the end but then the terminal just showed a > symbol.

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fectlyole

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2 Years ago

answered 2 Years ago oatglori · Accepted Answer

Using your parameters, and your "one option per line", a two pass encode looks like:

ffmpeg 

-y 

-i '/media/levan/BEEA60D8EA608E89/Downloads/Videos/Tony Braxton - Un-Break My Heart.VOB' 

-s 1920x1080 

-aspect 16:9 

-r 25 

-b 15550k 

-bt 19792k 

-vcodec libtheora 

-an 

-f ogg 

-pass 1 

/dev/null 

&& 

ffmpeg 

-y 

-i '/media/levan/BEEA60D8EA608E89/Downloads/Videos/Tony Braxton - Un-Break My Heart.VOB' 

-s 1920x1080 

-aspect 16:9 

-r 25 

-b 15550k 

-bt 19792k 

-vcodec libtheora 

-acodec libvorbis 

-ac 2 

-ar 48000 

-ab 320k 

-pass 2 

ddd.ogg

You can exclude the audio from the first pass and output to /dev/null (as in the example). I don't see any reason why you need three passes.