[FFmpeg-user] Any way to make this 2GB file any smaller?

David Favor david at davidfavor.com
Sun Nov 17 14:36:52 CET 2013

Gilles wrote:
> On Fri, 15 Nov 2013 12:56:57 +0100, James Darnley
> <james.darnley at gmail.com> wrote:
>> Start with this again (always use the highest quality input) and use
>> "better" encoding options:
>> - slower compression settings
>> - lower resolution
>> - lower quality
>> - different audio format
>> - lower audio quality
>> - fewer audio channels
> Thanks the tips. Using the following, the original 10G MPG file was
> compressed down to 1GB, which is good enough:
> ffmpeg.exe -i input.mpg -c:v libx264 -b:v 900k -s 640x360 -strict
> experimental -c:a aac -ab 192k -ac 2 -ar 44100 -preset slower
> output.mp4

As an experiment, try -crf 20 -v:preset veryfast + check time to encode
along with resulting files size.

Also using libfaac instead of aac usually results in higher quality
audio at lower bitrates. Or for same bitrate smaller audio.

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