I have a series of png-images (actually they are taken from an mp4-file).
I want to crop the same region from all the images I have taken.
What tool is best for that, such that I can define the region first and then crop all the png images to the same region of interest.
Is there something to batch compress the resultant images (lossless)?
I tried apngasm, unfortunately the details to be shown in the series get optimized away - although apngasm is said to work lossless!
Since all the resultant images have great similarity: What is the best way to zip them to minimum size such that they can easily appended to an email such that the other person can look at them step by step to discuss the detail I want to show in them.