CODEWITHSUNDEEP
videoffmpegvideo-streaming
yzhu
yzhu

Reputation: 93

How do i extract individual frames from videos using ffmpeg?

I have a bunch of videos downloaded from Youtube and I would like to extract frames from them. The current command I am using is:

ffmpeg -i input.mp4 -an -s qvga %06d.png

But I also want to set the -r and -t option. I want the fps to be the fps of each video, and the duration time is their duration. I know that if I don't set the -r option, the default is 25 fps.

So could anyone help? how to add the -r and -t option? and is there any better and accurate way to obtain individual frames from videos? Thanks a lot.

Upvotes: 5

Views: 6749

Answers (1)

llogan
llogan

Reputation: 133743

You do not need to set duration (-t) or frame rate (-r) when outputting images. By default ffmpeg will output all of the images.

Other notes:

  • If you want to limit the duration, such as only wanting the images from the first 3 seconds, then use -t 3.

  • If you want to limit the number of output frames, such as only wanting the first 100 frames, then use -frames:v 100.

  • Individual images do not have a frame rate. If you add -r, then ffmpeg will duplicate or drop frames if -r is different than the input frame rate. Omitting -r will output all images.

  • You don't need -an when outputting images.

  • Using the scale filter is more flexible than -s. It can prevent stretching because it can preserve the aspect ratio: -vf scale=320:-1

Upvotes: 6

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