Hi Viet,
I tried it with DM6446 but not with DM355. I need to look into this further on why DM355 MPEG4 elementary stream does not work. What is the version of MPEG4 codec and DM355 DVSDK you are using? Regards, Prateek ________________________________ From: Viet Hoang [mailto:[EMAIL PROTECTED] Sent: Friday, April 04, 2008 3:43 AM To: Bansal, Prateek; Albert Burbea; António" Silva Cc: [email protected] Subject: RE: DM355 MPEG-4 Streaming Hi all, Prateek, did you really try this (using live555MediaServer)? Here are what I tried and failed: 1) Record a short .mpeg4 clip using DM355, change the file's extension to .m4e and copy the file to live555MediaServer's directory, run live555MediaServer and then on a Windows PC use VLC to play that file using RTSP: FAILED - I didn't see any data received at VLC site. 2) Copy file davincieffect_ntsc.mpeg4 from /opt/dvsdk/data/videos/ to live555MediaServer's directory, change the extension to m4e, run live555MediaServer and use VLC to play that file: FAILED. 3) Play back those 2 files using ffplay (from ffmpeg) on Fedora 5: OK. Play back those 2 files using VLC 0.8.6f on Windows: FAILED. 4) Try 1 and 2 using files from DM6446, work well. I think 1 & 2 are due to the one-time sent VOL header as Antonio said. Is this due to the Beta released version of DM355EVM and mpeg4 codec? Do you have any idea how to fix this? Regards, Viet Hoang. "Bansal, Prateek" <[EMAIL PROTECTED]> wrote: Albert, Anotonio, I will suggest looking at http://www.live555.com/mediaServer/ Open source C++ libraries under LGPL to support RTSP streaming. There are test programs that are available with this library that can be easily cross-compiled on Montavista Linux platform. You can use the test program to stream MPEG4 elementary stream file contents generated by DM355 encoder and can be played back using any PC client like VLC, Mplayer to playback the stream contents. Regards, Prateek ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Albert Burbea Sent: Wednesday, April 02, 2008 5:58 AM To: António Silva Cc: [email protected] Subject: Re: DM355 MPEG-4 Streaming Thanks but I would not like to go and build a new RTP/RTSP etc stack on my own... I an sure there are readymade stacks like these on the net. I have heard of live555 and others. Any ideas ? Albert On 4/1/08, António Silva <[EMAIL PROTECTED]> wrote: The most helpful resources are RFCs from IETF. I can point you out the most important rfc's about the subject you pretend. RTP: rfc1889 RTSP: rfc2326 SDP: rfc2327 (this is useful for rtsp or multicast streams) RTCP: rfc3550 Then, depending on which standard are you working at (MPEG-4 SP, AVC) you have to verify the corresponding RFC to see how to packetizes the encoded frame. Regards, A.Silva On Mon, Mar 31, 2008 at 11:03 PM, Albert Burbea <[EMAIL PROTECTED]> wrote: hi all can somebody explain a little about video streaming in general, or give us some pointers? Especially on rtp, rtsp, and different kind of media thanks all On 3/31/08, António Silva <[EMAIL PROTECTED]> wrote: Hi all, I am trying to perform a test which consists in perform an MPEG-4 Encoder & Streaming application using the board DM355. I already worked with an H.264 Encoder & Streaming application, and with H.264 we have sps and pps periodically transmited which allows a client to receive the stream even is the sender is not at the beggining of the transmission. In MPEG-4 we only have the MPEG-4 header (I think is VOL header) at the beggining an then we just have VOP headers. The receiver cannot receive the stream if he dows not get the VOL header. My question is, how can we do this using the MPEG-4 Encoder at DM355? Does anybody knows the size of the VOL header generated by the encoder at DM355?? Thanks in advance, A.Silva _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source -- Albert Burbea Harishonim 8 Ramat Gan 52502, Israel Tel/Fax + 972-3-7526016 Mobile: +972-52-3541842 -- Albert Burbea Harishonim 8 Ramat Gan 52502, Israel Tel/Fax + 972-3-7526016 Mobile: +972-52-3541842 _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source Send instant messages to your online friends http://uk.messenger.yahoo.com
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