DirectShow Video Playback from memory
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Hi, Until now I used MCI to playback my videos directly from memory. I used this trick, because my avi's where inside a huge file archive, so I read them directly without any extraction. Now I want to update my code to use DirectShow for video playback, but it lacks a callback functionality like mmioInstallIOProc. Is there any approach in my situation ? Regards, George
sdancer75
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Hi, Until now I used MCI to playback my videos directly from memory. I used this trick, because my avi's where inside a huge file archive, so I read them directly without any extraction. Now I want to update my code to use DirectShow for video playback, but it lacks a callback functionality like mmioInstallIOProc. Is there any approach in my situation ? Regards, George
sdancer75
1. Google for DirectShow input filters that can read from memory OR 2. try writing your own filter to stream data from memory
> The problem with computers is that they do what you tell them to do and not what you want them to do. < > If it doesn't matter, it's antimatter.<
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1. Google for DirectShow input filters that can read from memory OR 2. try writing your own filter to stream data from memory
> The problem with computers is that they do what you tell them to do and not what you want them to do. < > If it doesn't matter, it's antimatter.<
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Yes, i suppose this is what I am gonna do..... I just wished to avoid time and effort in case there was something already out there that did the trick.
sdancer75
That's understandable, i tried googling around some too but didn't really find anything readymade either. I can think of two alternatives to writing your own source filter: 1. Extract your videos into some temporary files and play those from the file system, this can be a bit costy in both time and resource wise (you need time to extract the videos to temp files and you will need extra disk space for the videos) but i supose this is quite a straightforward solution. Alternatively you might try using a named pipe and specifying that as the source for the file reader filter, no idea if that would work or not, never tried, but i kinda suspect it wouldn't work. 2. Implement a "small" HTTP server in your application that can stream the video from your big file and try to render the stream with DirectShow like "http:\\localhost:12345\a.avi" or somesuch. This might be more work than just writing the filter though. Good luck.
> The problem with computers is that they do what you tell them to do and not what you want them to do. < > If it doesn't matter, it's antimatter.<
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That's understandable, i tried googling around some too but didn't really find anything readymade either. I can think of two alternatives to writing your own source filter: 1. Extract your videos into some temporary files and play those from the file system, this can be a bit costy in both time and resource wise (you need time to extract the videos to temp files and you will need extra disk space for the videos) but i supose this is quite a straightforward solution. Alternatively you might try using a named pipe and specifying that as the source for the file reader filter, no idea if that would work or not, never tried, but i kinda suspect it wouldn't work. 2. Implement a "small" HTTP server in your application that can stream the video from your big file and try to render the stream with DirectShow like "http:\\localhost:12345\a.avi" or somesuch. This might be more work than just writing the filter though. Good luck.
> The problem with computers is that they do what you tell them to do and not what you want them to do. < > If it doesn't matter, it's antimatter.<
Thanks for the reply. I already thought both of your solutions you suggest. The 1st is abandoned from the very beggining since the archive file is delivered in retail-DVD and as you can imagine the time needed to extract it in the hard disk is critical. The 2nd solution is also rejected, since this is a retail product and the configuration of end computer is unknown, any anti-virus or general other protection software may block my application to work as it expected. So I think a custom filter in my case is more than imperative. Thanks anyway,
sdancer75