[FFmpeg-user] Slow speed when sub-clipping .mxf

[Media Mouth]

> On Jun 21, 2023, at 03:54, MediaMouth <communque at gmail.com> wrote:
> 
> 
> 
>> On Jun 21, 2023, at 00:45, Cecil Westerhof via ffmpeg-user <ffmpeg-user at ffmpeg.org> wrote:
>> 
>> Try:
>>   ffmpeg  -ss startSecs -t outputDuration -i srcPath.mxf -timecode stmptTc -c copy destPath.mxf
>> 
>> For timecode you probably nee to use stmptTc - startSecs.
> 
> Thanks Cecil,
> 
> The only difference I'm in your cli code is that you put -ss and -t before -i, correct?
> 
> Curious how that affects the process / why would that make a difference?
> 
>> For timecode you probably nee to use smpteTc - startSecs.
> Been using hh:mm:ss:ff format and it's been working. I assume that has no affect on the speed of the process?

Whoah, wow, amazing!  Thank you Cecil!
Indeed putting the -ss and -t before the -i made all the difference.
I'm still curious why / what the meaning is.  FFmpeg is quite the mystery box.

Again, huge thanks!