CODEWITHSUNDEEP
gstreamergstreamer-1.0
Jinu
Jinu

Reputation: 586

What does 0 (zero) framerate mean in GStreamer?

I'm trying to learn GStreamer and couldn't understand something.

I saw some test codes from other projects as following,

video/x-raw,format=RGB,framerate=0/1

What does the framerate=0/1 in the above caps mean?

I tried using autovideosink to understand it. I first expected it to terminate directly but I see this little flickering frame before it terminates.

So does the framerate=0/1 not imply zero frames per second?

Upvotes: 2

Views: 2142

Answers (1)

Florian Zwoch
Florian Zwoch

Reputation: 7383

It does say that there is not a constant frame rate set. E.g. it can be variable frame rate (it can still be a constant frame rate - just the information is not set).

This is mostly due to historic reasons. Modern file containers store a timestamp for each frame - so the information of framerate is of no real interest (you can get the approx. by checking how many frames you have and how long the video is).

Older containers like .avi require this information set as it is written in its header and none of the frames themselves contain a time information.

Upvotes: 3

Related Questions