I want to create a thumbnail from video url that user submits from video sites like youtube, google video, metacafe etc. For example user can submit this video url: http://video.google.com/videoplay?docid=6204903272262158881 I know that we can use ffmpeg to create the thumbnail but we have to get the video file (FLV) first, right? how to get the FLV from the site?
you could try keepvid.com. they have some sort of encryption, which doesn't allow to download videos to ordinary mortals, but just programs/sites, which decrypt the quite simple (I think javascript) encryption method. There are many more ways described here : mashable.com/2007/05/05/download-youtube-video/
No, i mean like ulinkx.com, if you're a member you can add video by entering the video url from any sites and they will capture the thumbnail of those videos. When I opened this thread I thought they download the video first, but I'm wrong, it seems they don't download because it will take a long time to download video just for getting the thumbnail. So, how do they do that?