Rendering to image skips images...

[Clems]

Hello,

I would like to use the "images output" module to get a set of images that are the frames sequence of a video. I configure the module as following :
image format : PNG
image width : 1024
image height : 576
ratio : 1

I have also deselected the "skip image" check box under the main video options panel.

My video has 25 frames per second but i notice that for one second, i do not have all the 25 frames ! Why ? is there a way to get all the frames, it's really important !

Or perhaps there's a way to move forward frame by frame and then i can use the snapshot tool...

Thanks in advance for your help.

(Since i'm using a french version, it's possible that some terms i use to describe options differ a little from the english version, i try to translate and i hope that the main purpose will be still understandable).