Advertisements

Archive for May 13th, 2014

Extracting Frames From A Video File

Using avconv (formerly ffmpeg):

avconv -ss 00:07:05 -i MAH00016.MP4 -t 2 -f image2 -q 1 Image-%03d.jpeg

The options:

  • -ss starting time in hh:mm:ss (or seconds)
  • -i input file
  • -t duration in seconds (or hh:mm:ss)
  • -f mux/demux for still images
  • -q quality (1 = best)

Use a video player to find the interesting section, then bracket it with the starting time and duration. Putting the -ss starting time before the -i input file lets the decoder skip through the file, rather than grinding through everything preceding the specified frames.

The -q 1 setting wrings the best quality out of the input video file. That’s why the camera captures 1920×1080 video @ 60 fps; I wish I could dial its compression back a bit, but that’s not an option.

So.

Do you think he didn’t quite kill me between bites or is that a K-Mart bag and he was yakking on a phone like everybody else?

Near Miss - Jackson Drive - 2014-05-03 - car interior

Near Miss – Jackson Drive – 2014-05-03 – car interior

Clicky for more dots. I compressed the image from the avconv output file, but it’s good enough.

Advertisements

4 Comments