You have to use the Camera module, not the raw ezbv4video module. The camera module has the recording built in, unless it's something you need full control over.

I will provide an example of both when I am in front of the computer in a few hours.

the camera.AVIStartRecording should work.

an example:

        private void StartOrStopVideoRecordingButton_Click(object sender, EventArgs e)
        {
            if (!this.camera.IsActive)
            {
                this.WriteDebug("ERROR: Camera not started");
                return;
            }

            //Note: .Tag = "Start Video Recording|Stop Video Recording
            var labels = this.StartOrStopVideoRecordingButton.Tag.ToString().Split(new[] { '|' });
            
            if (!this.camera.AVIIsRecording)
            {
                var filename = this.ImageFileNameTB.Text + ".avi";
                this.WriteDebug("AVI Start recording to file=" + filename+ " ." );

                const int framesPerSecond = 3;
                this.camera.AVIStartRecording(filename, Camera.VideoCodec.MPEG4, framesPerSecond);

                this.StartOrStopVideoRecordingButton.Text = labels[1];
            }
            else
            {
                this.WriteDebug("AVI Stop recording" );

                this.camera.AVIStopRecording();

                this.StartOrStopVideoRecordingButton.Text = labels[0];
            }
        }

It's simple and straight forward.

I've updated the Github repository. if you still have issues, you can check the example.

@DJ would u difference between them more clearly

@ptp there is no words enough to thank u

@DJ thanks for ur recommendation