Audio stream into Asf file pen <pan926[ at ]gmail.com> 10/6/2008 11:45:07 AM Hi, I use Windows Media Format SDK 9.5 to write a ASF Muxer filter, the filter can receive precompressed video and audio data. In addition, I have implemented a PCI based AVStream driver as a live source filter, it can send compressed video and audio data. The subtype of source filter's video capture pin is "H264", and the subtype of audio pin is "ADPCM". I use Graphedit to test, and the connection is as followig: For capturing file: (H264 data) video capture pin --> ASF muxer audio pin -- / (ADPCM data) For rendering file: WM ASF reader --> h264 decoder --> video render \--> ADPCM decoder -> sound render device My question is as below: The audio pin sends packets while capturing. However, when I render the ASF file, the packets list are out of order. Audio packet: 1->2->4->3->5... Does anyone know which factor will determine the audio packet list in ASF file? like.. 1.The vedio timestamp impacts on the audio? 2.Modify audio or vedio duration time ? pHeader->Duration = -Timelimit.QuardPart; 3.Modify audio bitrate ? otherwise Could I control the packet list by modifying my source filter or ASF muxer filter? Thanks a lot! Best Regards, pan.hsu

Re: Audio stream into Asf file "Alessandro Angeli" <nobody[ at ]nowhere.in.the.net> 10/6/2008 3:29:16 PM From: "pen" [...] [Quoted Text] > Could I control the packet list by modifying my source > filter or ASF muxer filter? If you use Microsoft's WMWriter to create the ASF and Microsoft's WM[Sync]Reader to parse it, you will receive the same samples and in the same order as you wrote them. If you use custom components, then you need to find out how those components behave. -- // Alessandro Angeli // MVP :: DirectShow / MediaFoundation // mvpnews at riseoftheants dot com // http://www.riseoftheants.com/mmx/faq.htm