avisynth: how trim using for example 0:00:31.040000 ?

[marcorocchini]

Hi ****
please consider I have a mp4 file that have duration of 1 minute
but I would like trim it so that is have to encoded from 0 to 0:00:31.040000

can use time instead of frames?

I'm in a 25fps timebase, thanks

[poisondeathray]

I assume that is H:M:S.ms notation ?

You have to convert to frames. Obviously you cannot trim video on fraction of a frame

1/25 = 0.04
31 * 25 = 775
775+1 = 776 frames

[racer-x]

Encode with ffmpeg:

-t 00:00:31.04

[marcorocchini]

ah ok thanks

[marcorocchini]

Encode with ffmpeg:

-t 00:00:31.04

but I need use avisynth

please racer do you know is exist a batch that automatically convert the value:

00:00:31.04

or

0:00:31.040000

or

00:00:31.040

or

00:00:31,040 (etc.. but is the same time value)

into -------------> frame count @ 25 fps?

thank you

[racer-x]

use a calculator..................

31.04 x 25 = 776

Avisinth:

trim(0,775)

[marcorocchini]

use a calculator..................

but I'm inside a batch ^^

[Cornucopia]

Then script it with string parsing, saved to temporary memory values and then process & combine them. There are scores of excel code on the web for doing just this, and you should be able to port the ideas to a batch file, right?

Scott

[marcorocchini]

mm I can try but I don't know if I'm able: I am a cat

[Cornucopia]

Well, then I wouldn't worry about it: cats have no need for timecode.