Here’s the method I’m using to create a set of images from a webcam (at 1920×1080) as reliably as possible.
I’m using a simple 2 step process:
First, I’m capturing from the webcam at a constant bitrate with a rather lossless quality
Duration is set to 15 seconds, writing to capture.mp4, overwriting existing files.
ffmpeg -f video4linux2 -input_format yuyv422 -an -i /dev/video0 -r 30 -c:v libx264 -qp 18 -t 15 capture.mp4 -y
Secondly, I’m simply converting the video clip to png:
ffmpeg -i capture.mp4 image_%04d.png
This gets problematic at this quality though:
My 15 seconds video clip is ~13 MB
The 450 png files total over 1.1 GB
The purpose for this is to eventually make animated gifs from a purpose built crank camera similar to Otto