[FFmpeg-user] Output image sequence duplicate first image

[Mark Filipak]

Hi, Adam,

On 04/20/2020 10:28 AM, adam smith via ffmpeg-user wrote:
> Hi you lovely people,
> 
> I am trying to output a sequence of jpeg images from a video file. The command does indeed output a sequence of images, but the first and second are always duplicates, while the rest run in sequence until the maximum is reached or the file runs out.
> I am not sure what I have done wrong. I thought I have asked for -r 10/60 so 10 a minute regardless of frame rate.
> 
> Any ideas how to stop the duplicate being created?
> Thanks in advance
> 
> Here is my full terminal…
> 
> /usr/src/app # ffmpeg -y -i /data/vod-storage-dev/source/testfile.mxf -r 20/60 -s 283x159 -frames:v 10 -pix_fmt yuvj420p -c:v mjpeg  /data/vod-storage-dev/temp_out/1cq8tq69tkumv1es0zxeb0ty4qa_%03d.jpeg

May I suggest the following workaround?

Remove the 1st (duplicate) frame with a select filter:

ffmpeg -y -i /data/vod-storage-dev/source/testfile.mxf -vf select='not(eq(n\,0))' -r 20/60 -s 
283x159 -frames:v 10 -pix_fmt yuvj420p -c:v mjpeg 
/data/vod-storage-dev/temp_out/1cq8tq69tkumv1es0zxeb0ty4qa_%03d.jpeg

Untested.