My video details : DV-PAL 720x576i , 25FPS , duration=20s , frames=500

I need to increase (double) the video frames without any duplicate frame.

I used the following commands to increase (double) frame rate of the video.

ffmpeg -i in.avi -r 50 out.avi
ffmpeg -i in.avi -r 50 -filter:v setpts=2*PTS out.avi

But not works properly.

Please tell me How to double video frames without any duplicate frames?

Note : tool (ffmpeg or mencoder or etc.) and the duration and speed are not matter for me, Because I want to extract frames.

1 Answer 1



ffmpeg -i in.avi -r 50 -filter:v "setpts=0.5*PTS" out.avi


ffmpeg -i in.avi -r 50 -filter:v "setpts=N/50/TB" out.avi

If you want to interpolate new frames, use

ffmpeg -i in.avi -r 50 -filter:v "yadif,framerate=50" out.avi

yadif is a deinterlacing filter, which is needed since the framerate filter does not operate on interlaced media.

  • Thanks for the reply,But the output of both your commands has 500 frames.(I need to get 1000 frames without any duplicate)
    – Maria
    Jun 6, 2016 at 12:02
  • I used this command to extract out.avi : ffmpeg -i out.avi -f image2 %d.png
    – Maria
    Jun 6, 2016 at 12:02
  • See new command.
    – Gyan
    Jun 6, 2016 at 12:23
  • Yes I want interpolate new frames , but the new frames quality is poor , I need something like this ,But I think that is impossible by ffmpeg (? maybe I'm wrong) ,So I'll accept your answer. Thank you very much.
    – Maria
    Jun 6, 2016 at 12:57
  • 1
    Try slowmovideo.
    – Gyan
    Jun 6, 2016 at 13:29

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