LEAD Support Forum   Resource to find answers and post technical questions about LEAD products. Search       Forums Home

Re: Playing Big size video files Started by harish@axsys-healthtech.com at 07-29-2008 6:13. Topic has 3 replies. LEAD Support Fo... » Developer » Multimedia » Re: Playing Big size video files

Search

07-29-2008, 6:13 harish@axsys-healthtech.com Joined on 04-27-2005 Posts 10 Playing Big size video files Hi All, I have a very big video file. I am saving that file in Database. Now i want to play that file in client side. Is ther any mechanism where i can fetch chunks of files and buffer them to Lead control. Best example i can give is that of Youtube where it fetches the video file on demand. I need ideas to implement this feature. Thanks and Regards, Harry    Report

07-29-2008, 11:42 Qasem Lubani Joined on 08-13-2006 Posts 1,187 Re: Playing Big size video files Harry, I'm afraid that we do not have an example that does this or a method that can access a file in a Database. However, one way to do this is by storing the video file to desk in a file format that supports seeking(Such as OGG) and store the file name in a Database. Then use our ltmmConvert upon the customers request to access the file and stream the portion of it that the client wants through the ltmmConvertCtrl.SelectionStart Property and the ltmmConvertCtrl.SelectionEnd properties. Qasem Al-Lubani LEAD Technical Support www.leadtools.com    Report

07-30-2008, 1:35 harish@axsys-healthtech.com Joined on 04-27-2005 Posts 10 Re: Playing Big size video files Hi Qasem , Thanks for you suggestion. While searching for the approach i came accross this one also where i can divide the main vidoe files into multiple files and save them indivisually in database. That we can do easily using ltmmConvertCtrl.SelectionStart  and ltmmConvertCtrl.SelectionEnd porpoerties, but my problem is coming when i want to play this file. Let us say I have one file of size 100KB named as MainFile.avi. I am dividing this file into four small size files of 25 KB each with diffrent names. Now for this first time i will load first part of file in ltmmPlay control, if user reaches the end of this file again i will request DB for next part of file and so on. But my problem is that how can i combine all these files once user reaches the end of last section. As we are providing slider to user, after reaching end of file he can go use slider to see any part of file. Regarding OSG, I dont have much idea. I hope you understood what exactly I want. If you feel that OSG can solve  my problem, please advise me how I can use OSG.   Thanks, Harish          Report

07-30-2008, 10:44 Qasem Lubani Joined on 08-13-2006 Posts 1,187 Re: Playing Big size video files This approach might work, but it will have its own problems. One of them is the jump from one of the smaller files to the next. Our ltmmConvert control at the transmitter side (server) will have to switch between files, which will cause a discontinuity in playback, and possibly a disconnection between client and server. You could program the application to re-connect, but the delay might not be acceptable.   About the OGG files, this is just a file format like AVI and WMV. However, OGG has better seeking capabilities than AVI, so it might be easier to jump from one position to another in the file. Qasem Al-Lubani LEAD Technical Support www.leadtools.com    Report

LEAD Support Fo... » Developer » Multimedia » Re: Playing Big size video files

(please select) Forums Home |- Search Forums |- Active Topics |- Unanswered Posts User Options |- Sign In |- Create a New Account |- Forgot Password General |- Feature Requests |- Example Requests |- Support Site Suggestions Enduser |- ePrint |-- FAQ |- Multimedia Codec's |- Capture & Convert |- Capture & Present |- Photoshop Plugins |- LEADViEW LEAD/Axtel Barcode SDK |- LEAD/Axtel FAQ |- Barcode Developer |- FAQ |- General |- Image Processing |- Image Compression |-- Examples |- Color Conversion |- Image Display |- Special Effects |- Multimedia |- Internet |-- Examples |- File Formats |- Scanning/Capture |- Common Dialogs |- Printing |- Annotations |- Database |- DICOM/Medical Imaging |- OCR |- JBIG |- Vector |- PDF |- ePrint API |- Multimedia Filter Pack API |- DotNet |-- COM Interop |-- WPF |- Deployment |- Forms Recognition |- JPIP