Video play in backward

You will need to give more information as to how you're playing the video in the forward direction in the first place, before this question can be answered.

Actually , i just play forward video like below :

Video video = Video.FromFile("video.avi");
video.Play();

Here, i would like to know how about a video play backward?
Got any idea to do it?

Quote:

Original post by tiramisung Actually , i just play forward video like below : Video video = Video.FromFile("video.avi"); video.Play(); Here, i would like to know how about a video play backward? Got any idea to do it?

So what language is that written in? Did you write the code for Video? If not, where did you get get from?

Video is come from directX which is using Microsoft.DirectX.AudioVideoPlayback.
Language is c#.

Any idea?

The easiest option is to use a video editing program to create a second copy of the video that has the frames in reverse order.

The reason being that video compression is usually only designed to be able to play it back smoothly going forwards. You could try leaving it paused and using SeekCurrentPosition, but it probably won't work very well.

Thanks for reply.
I had try to using SeekCurrentPosition but sure play not well.
Any other idea?
Thanks...

Video streams consists of I frames and P Frames; each I frame is a standalone frame, but each P frame is relative to the frames before it (usually the last P/I frame before it). Since the data's not available, you can't really step backwards; it just doesn't have a P frame for "this frame -1"; you'd need to find the last I frame before it, then reconstruct all the P frames up to the frame you're looking for. That could get.. expensive.


Allan

What exactly are you trying to do? If you're writing some sort of video editing software, you should be storing the video uncompressed, so each frame is it's own uncompressed image.
If you have a specific video you want to play backwards, just re-encode a reverse version of the video.
If you want to reverse an arbitrary video, you'll probably find that you'll need to play the video forwards, capture each frame, and write it out in reverse (I.e. re-create the video file). As others have said, normal video codecs don't support playing the video backwards.