change recording file programmatically in directshow

Question

I made a console application, using directshow, that record from a live source (now a webcam, then a tv capture card), add current date and time in overlay and then save aud

Answer 1

Well, I have the product (http://www.videophill.com) that does exactly what you described (its used for broadcast compliance recording purposes) - and I found that only way to do that is this:

• create a dshow graph that will be used only to capture the audio and video
• then, at the end of the graph, insert samplegrabber filters, both for audio and video
• then, use IWMWritter to create and save wmv file, using samples fetched from samplegrabber filters
• when time comes, close one IWMWritter and create another one.

That way, you won't lose single frame when switching the output files.

Of course, there is also question of queue-ing and storing the samples (when switching the writters) and properly re-aligning the audio/video timestamps, but from my research, that's the only 'normal' way to do it, and I used in practice.