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various image oprations
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| //dump jpeg | |
| curl "http://10.41.3.120/cgi-bin/faststream.jpg?stream=MxPEG&fps=0.1" | mxgconv_linux format=jpeg,of=img | |
| //split images | |
| find ./ | grep jpg |xargs -I@ convert -quality 100 -crop 640x480 @ @_cropped_%d.jpg | |
| //preserve original filename in images | |
| ls | xargs -I@ echo exiftool -Comment=@ @ | |
| //rename file to md5sum name | |
| ls | grep jpg$ | xargs -I@ sh -c "mv @ \$(sh -c \"md5sum @ | cut -f 1 -d ' '\").jpg" | |
| //create empty labels | |
| ls | cut -f 1 -d . | xargs -I @ echo @.txt | xargs touch | |
| //create labels for images using yolo | |
| find /path/to/images | grep jpg | ./darknet detector test darknet.data darknet-yolov3.cfg yolov3_best.weights -dont_show -save_labels | |
| //extract frames from video files | |
| find ./ -maxdepth 1 | xargs -I@ ffmpeg -i @ "@-%05d.png" | |
| //combine frames into video filer | |
| ffmpeg -i "10.0.29.108.mjpg-%05d.jpg" -c:v libx264 -vf "fps=15" 10.0.29.108.mp4 | |
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