Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top
ffmpeg -i IMG_9353.JPG -pix_fmt yuv420p -y qqq.y4m
x264 qqq.y4m --preset placebo --tune stillimage --crf 33 -o qqq.mkv

How to extract the picture now? qqq.mkv is non-empty, size depends on "crf" option, but all players (mplayer -vo pnm, ffmpeg -i qqq.mkv -y qqq.ppm, vlc) consider the video as empty and does not show anything at all (not produce any output files).

share|improve this question
up vote 1 down vote accepted

Gstreamer works in this case

gst-launch filesrc location=qqq.mkv ! decodebin ! pnmenc  ! multifilesink location=r.ppm

If it fails, freezes or fails to produce files with "pnmenc" you can use "pngenc", "y4menc", "jpegenc" and other image codecs for saving.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.