摘要：
method 1 : use =avconv= package in Linux e.g. to convert images (v_1.png, v_2.png ...) to 'velocity.mp4' avconv -i v_%d.png -b:v 1000k velocity.mp4 to 阅读全文
摘要：
Goal: I want to write a program for this: In a folder I have =n= number of files; first read one file and perform some operation then store result in 阅读全文