Video frame rate change from video to video

[abdelhady]

HI all ,

when I use labview 2013 I found some strange in acquiring avi video

 when I acquire video from my computer the fps change from video to another one

some video fps reach 800 fps and other reach 180 fps what is the problem 

[Erik-S]

Hello,

It could have to do with the codec that you are using. Here is a KB that goes through codecs in LabVIEW. Can you tell us what kind of camera you are using and any changes in your code that results in the slower frame rate?

-Erik S

[abdelhady]

Thank you for your replay

first I didn't use any camera, I play avi video from my computer

the video that reach 800 fps is downloaded from internet

but the videos that reach 200 fps , I converted them from mp4 to avi (MJPEG)

I understand from your answer if I change the the codecs , the fps could be accelerated <can you tell me the fastest codec that I can use? 

[Erik-S]

A lower frame rate is actually expected behavior if you are playing video through LabVIEW. This KB explains that LabVIEW analyzes the video one frame at a time and keeps it in the system memory on the CPU.  This can result in slower frame rates during playback. If you would like to simply view video through your front panel, it may be a good idea to embed Windows Media Player in the VI through an ActiveX control.

-Erik S

[newyear2016happy]

I use iDealshare VideoGo to change video frame rate from 1 to 60 especially among 23.97fps, 24fps, 25fps, 29.97fps, 30fps, 50i/p, 60i/p, 72p, 120p, 300p and etc;

It can change frame rate of video files of all variety like change AVI frame rate, change MP4 frame rate, change frame rate of MOV, Apple ProRes, R3D, AVCHD, WMV, MKV, VOB, DV, WTV, FLV, SWF, MXF, RMVB and more;

[Hatef.fouladi]

could you show your code that you use to acquiring avi video?