avconv: make a video from a subset on images

Question

I am trying to make a bunch of png\'s into a video using avconv, the png\'s are numbered like filename_ so I usually just use the command:

Answer 1

avconv -r 10 -start_number 8 -i filename_%d.png -b:v 1000k test.mp4

You will need a recent 9.x version of avconv for the -start_number option; it is not in version 0.8.x. Alternatively you could use a recent version of ffmpeg. Or rename the files to start with a number between 0 and 4, as it will check for those names by default.