[FFmpeg-user] ffmpeg generate the video from non-sequential images

[Ayush Narsaria]

Dear Moritz,

Thank you again for replying.

I managed to solve the problem b dividing my images into two parts based on
number of leading zeroes and then concat both of the generated video.
That also works. I will also try your method.

Thank you

Best,
Ayush


On Tue, Oct 30, 2018 at 10:12 AM Moritz Barsnick <barsnick at gmx.net> wrote:

> On Mon, Oct 29, 2018 at 17:29:29 +0100, Ayush Narsaria wrote:
> > When I try your suggestion I get this error:
>
> Sorry, as Carl Eugen kindly pointed out, I failed to place the
> "-start_number" option as an input option.
>
> > res_%d.png: No such file or directory
> >
> > So the filenames start from res_05.png till res_180.png but there are
> some
>
> Well, in honesty, you said the name would be res_5.png, not
> res_05.png. That's a difference for the "%d" operator. You need to
> force min two digits with filling zeros: "%02d".
>
> > files missing in between like res_13.png etc.
> > Would that be a problem?
>
> Yes. In that case, you would place the list of images in a text file:
> file res_05.png
> file res_07.png
> file res_12.png
>
> and use the concat demuxer:
> $ ffmpeg -r 5 -f concat -i in.txt -c:v libx264 output.mp4
>
> (Should work. ;-) I get peculiar DTS warnings though, must investigate.)
>
> Moritz
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-- 
Ayush Narsaria
PhD Student
VU University, Amsterdam