[FFmpeg-user] Why are these different?

[Mark Filipak]

On 08/02/2024 15.16, Paul B Mahol wrote:
> 
> I think, that one of variant use seeking (in container via demuxer) and
> other one use frame seeking by decoding everything from start using trim
> filters.

Nope. Neither is decoding -- too fast -- as though decoding would/should make a difference.

Here's '-ss' before '-i' (definitely using demuxer):
size=  247808kB time=00:01:02.90 bitrate=32273.5kbits/s speed=2.23x

Here's '-i' before '-ss':
size=  592384kB time=00:02:33.87 bitrate=31537.1kbits/s speed=4.35x

The '-i' before '-ss' case is actually faster.

--Mark.