thank's all is fine now

François-marie
Le 09/07/2020 à 11:38, Gyan Doshi a écrit :


On 09-07-2020 02:50 pm, François-Marie BILLARD wrote:
Hello,

i'm new on this list and would use ffmpeg for making a video from pictures.

I have used this command line; with 54 pictures from DSC_0527.JPG :

ffmpeg -f image2 -i DSC_05%2d.JPG -start_number 0527 -r 12 -vcodec mpeg4 -b 15000k ouverture_four.mp4


i have this error, when i launch the command in the directory with the pictures :

[image2 @ 0x55b7146af8c0] Could find no file with path 'DSC_05%2d.JPG' and index in the range 0-4
DSC_05%2d.JPG: No such file or directory

It should be

    ffmpeg -f image2 -start_number 27 -i DSC_05%2d.JPG -r 12 -vcodec mpeg4 -b 15000k ouverture_four.mp4

`-start_number` qualifies the input so it belongs before the corresponding input `-i`

 In ` DSC_05%2d`, 05 is a literal and so not recognized as part of the numbering pattern.

Also, `-r 12` will cause ffmpeg to drop 13 out of every 25 images, since ffmpeg assumes a default frame rate of 25 for image sequences. You can override it by adding -framerate 12 for this input. (And then drop -r 12)

    ffmpeg -f image2 -start_number 27 -framerate 12 -i DSC_05%2d.JPG -c:v mpeg4 -b:v 15000k ouverture_four.mp4


Gyan
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--
François-Marie
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