[FFmpeg-user] File sizes after transcoding with ffmpeg.

Elliott Balsley elliottbalsley at gmail.com
Wed Dec 4 00:49:46 CET 2013

> Ok. I transcoded mp4 directly to PAL DVD format like so:
> ffmpeg -i in.mp4 -vf subtitles=sub.srt -target pal-dvd in.vob
> Now, the file-sizes are:
> in.mp4 - ~20MB
> in.vob - ~116MB
> dvd.iso - ~117MB
> The iso is now around 6 times the input mp4.

That’s normal.  DVD’s typically use between 3 and 8 Mbps.  MPEG-4 is a much more efficient format than MPEG-2.  

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