[FFmpeg-user] Tips on compressing videos created by GoPro

Andrey Goreev aegoreev at gmail.com
Fri Oct 20 06:50:39 EEST 2017

Just tried with "-c:a copy" instead of "-c:a libfdk_aac -b:a 192k" and the 
output actually got slightly bigger... 

On Thursday, October 19, 2017 8:26:08 AM MDT, Kieran O Leary wrote:
> Hi,
> On Thu, Oct 19, 2017 at 2:33 PM, Andrey Goreev <aegoreev at gmail.com> wrote:
>> ffmpeg -i [INPUT-FILE]  -y -f mp4 -c:a libfdk_aac -b:a 192k -c:v libx264
>> -crf 23 -preset slow -map_metadata 0 [OUTPUT-FILE]
> On a side note: I think the internal ffmpeg aac encoder might as good
> if not better now than libfsk_aac, so you should be able to just use
> -c:a aac instead. BUT is there a reason why you are increasing the
> bitrate from 128kb/sec to 192kb/sec? You're just making the file
> bigger. Why not just copy that stream instead with -c:a copy.


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