CODEWITHSUNDEEP
ffmpegsize
debuti
debuti

Reputation: 683

Recoding in ffmpeg by size

Is there any way to recode in ffmpeg by setting the desired output size? I mean something like this

ffmpeg -i in.mp4 -size 650MB out.mp4

So ffmpeg (or a wrapper) calculates the size of the picture, codec, bitrate, and so..

Upvotes: 0

Views: 178

Answers (1)

llogan
llogan

Reputation: 133873

Note that file size = bitrate * duration and bitrate = file size / duration. You know your desired file size (650 MB) and your duration (see the output of ffmpeg -i in.mp4). Now read the two-pass ABR example in the FFmpeg and x264 Encoding Guide. The example really requires the associated explanation otherwise I'd include it here.

Upvotes: 1

Related Questions