ffmpeg split avi into frames with known frame rate

Question

I posted this as comments under this related thread. However, they seem to have gone unnoticed =(

I've used 'ffmpeg -i myfile.avi -f image2 image-%05d.bmp' to split 'myfile.avi' into frames stored as .bmp files. It seemed to work except not quite. When recording my video, I recorded at a rate of 1000fps and the video turned out to be 2min29sec long. If my math is correct, that should amount to a total of 149,000 frames for the entire video. However, when I ran 'ffmpeg -i myfile.avi -f image2 image-%05d.bmp", I only obtained 4472 files. How can I get the original 149k frames?

I also tried to convert the frame rate of my original AVI to 1000fps by doing 'ffmpeg -i myfile.avi -r 1000 otherfile.avi' but this didn't seem to fix my concern.

Answer 1

ffmpeg -i myfile.avi -r 1000 -f image2 image-%07d.png

I am not sure outputting 150k bmp files will be a good idea. Perhaps png is good enough?