IWMWriterSink::OnDataUnit Doubt patilchinmay[ at ]gmail.com 6/29/2007 6:28:20 PM Hi, I am new to WMF SDK and still in the learning process. My app is trying to write a WMV file from uncompressed video. One of the requirements of my application is I need to send back encoded packets to a SDK I am using. Now, the problems is when I send back the encoded packet, I also need to specify the input(audio or video stream). Is there a way to figure this out from OnDataUnit callback? If not, Is it a good way to maintain some sort of buffer in front when I send the packet to writer? Thanks, Chinmay

Re: IWMWriterSink::OnDataUnit Doubt "Alessandro Angeli" <nobody[ at ]nowhere.in.the.net> 7/1/2007 2:13:03 AM From: "patilchinmay[ at ]gmail.com" [Quoted Text] > I am new to WMF SDK and still in the learning process. > My app is trying to write a WMV file from uncompressed > video. One of the requirements of my application is I > need to send back encoded packets to a SDK I am using. > Now, the problems is when I send back the encoded packet, > I also need to specify the input(audio or video stream). > Is there a way to figure this out from OnDataUnit > callback? The WMWriter creates an ASF transport stream ansd not elementary a/v streams so, IIRC, the buffer passed to your IWMWriterSink::OnDataUnit() can contain payloads of more than one elementary stream. If you need to process the elementary a/v streams, you should not use the WMWriter but the WMA/WMV DMO encoders. > If not, Is it a good way to maintain some sort > of buffer in front when I send the packet to writer? In front of what? -- // Alessandro Angeli // MVP :: DirectShow / MediaFoundation // mvpnews at riseoftheants dot com // http://www.riseoftheants.com/mmx/faq.htm