# Setting specific FPS for video

I have a video that was recorded using my laptops webcam.

According to the mplayer tool, my FPS for this video is set to 29.75 FPS (using the mplayer -identify -frames 0 myfile.webm command).

In blender's video sequence editor, under Dimensions, FPS, I choose custom, and then type in 29.75 for my video, but when I press enter, it rounds up to 30FPS. My video and audio tracks don't line up.

Why doesn't it let me set the specific FPS? How can I best rectify this situation?

Thanks.

• What happens if you use the 29.97 preset? Is it still off? – TARDIS Maker Nov 23 '15 at 22:52
• Yes, at 29.97FPS I have 81002 audio frames and 80407 video frames, at 30FPS I have 81083 audio frames and 80407 video frames. – jevonearth Nov 23 '15 at 22:55
• After playing around with it a bit, I think it might just not be possible at the moment. Is there any chance that you could use an external video editor/video converter to bring the frame rate to 29.97 or 30? Also, I think this might be something worth talking to a dev about. It doesn't seem to good to be to limit frame rates. I just checked, and you can't add anything about 120 also, which could be pretty limiting. – TARDIS Maker Nov 23 '15 at 23:06
• I happened to test with some other video @120 FPS, and that does work fine. FYI. – jevonearth Nov 23 '15 at 23:56
• Have you tried to play with the framerate base? fps 60 with base 2.017 seems to set 29.75 fps, but I don't know if this works for you... this BA thread has similar issue, it seems blenderartists.org/forum/… – m.ardito Nov 24 '15 at 0:04

The easy way to get the right base value is to enter a calculation which is the set fps divided by the target rate. eg 30 / 29.75, when you then press enter it will show the value of 1.008 and the frame rate will show as Custom (29.75 fps)