Thank you a lot!
I tried /-r 30/ but I placed it before the /-f concat/ and it failed!
Placing it after /-f concat/ and before/-i/...
it worked as expected!

Davide

On 19/08/2017 13:36, Evert Vorster wrote:
Hi there.

Just place -r 30 in front if the -i, and it all should work as you intend.

-Evert-

On 19 August 2017 at 10:47, Carl Eugen Hoyos <[email protected]> wrote:

2017-08-18 23:34 GMT+02:00 Davide <[email protected]>:
Dear you all,

I am trying to set the input framerate of a sequence of images:

if I am working with a single image sequence everything works properly:
*ffmpeg -framerate 30 -i folder01/img%05d.jpeg ......*

then, because I have more folders
(and I was unable to get the -i
concat:filesequence1|filesequence2 working)
Please elaborate, if the mjpeg demuxer is not
autodetected, force jpeg pipe with "-f jpeg_pipe".
(Or are these different files, not just jpeg?)

I tried to use:

*ffmpeg -framerate 30 -f concat -safe 0 -i filelist.txt .....
*but I receive a:
*Option framerate not found.

*then if I omit the "-framerate 30", everything runs smoothly, but ffmpeg
defaults to a 25 fps value for the input image sequences.

Any ideas on how to fix this?
You are describing a missing feature, the concat demuxer does
not allow to forward options to the actual demuxers.

Carl Eugen
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