ffmpeg crop/trim video MP4 after update now is taking so much longer

BudiKusasi · 07-07-2022, 09:44 PM

Anyone may know

How come just for doing a crop/trim video MP4, after update, now ffmpeg is taking
so much longer, many more processes

Code:

$ ffmpeg -i "b.mp4" -to 0:2:20  a.mp4

used to do it nicely done in few seconds
Also
What's difference between ffmpeg and ffmpeg4.4 in Linux repo ?

teckk · 07-08-2022, 11:30 AM

Quote:

What's difference between ffmpeg and ffmpeg4.4

Are you using arch

Code:

pacman -Si ffmpeg

pacman -Si ffmpeg4.4

Quote:

ffmpeg -i "b.mp4" -to 0:2:20 a.mp4

You re-encoded it. If you want a section without re-encoding

Code:

ffmpeg -t 00:02:20 -i input.mp4 -c:a copy -c:v copy output.mp4

I'll let you read the man page to see what the default video codec for ffmpeg is.

Also a difference in speed between

Code:

ffmpeg -t 00:02:20 -i input.mp4 -c:a copy -c:v copy output.mp4

ffmpeg -i input.mp4 -t 00:02:20 -c:a copy -c:v copy output.mp4

First one is faster, second one is more accurate.

Read:
man ffmpeg
https://trac.ffmpeg.org/wiki/TitleIndex
https://ffmpeg.org/ffmpeg.html

I know that there is a lot of info there. We are talking about ffmpeg, does anything to a video, but you have to command it.

BudiKusasi · 07-08-2022, 11:47 AM

Quote:

Originally Posted by teckk

Are you using arch

Code:

pacman -Si ffmpeg

pacman -Si ffmpeg4.4

You re-encoded it. If you want a section without re-encoding

Code:

ffmpeg -t 00:02:20 -i input.mp4 -c:a copy -c:v copy output.mp4

I'll let you read the man page to see what the default video codec for ffmpeg is.

Also a difference in speed between

Code:

ffmpeg -t 00:02:20 -i input.mp4 -c:a copy -c:v copy output.mp4

ffmpeg -i input.mp4 -t 00:02:20 -c:a copy -c:v copy output.mp4

First one is faster, second one is more accurate.

Read:
man ffmpeg
https://trac.ffmpeg.org/wiki/TitleIndex
https://ffmpeg.org/ffmpeg.html

I know that there is a lot of info there. We are talking about ffmpeg, does anything to a video, but you have to command it.

I FORGOT, OF REALLY FORGOT, BTW that's human nature..

SOLVED! THANKS BILLION !!!