Prateek,
Thanks for your reply.
Yes, please try to run live555MediaServer on DM355.
I am using dvsdk_1_30_00_23, and from the Release Notes of MPEG4 codec I can
see the version of MPEG4 Encoder is 1.06.000 and MPEG4 Decoder is 1.05.000.
I don't know clearly, but there are very much Limitations listed in the
Release Notes and Datasheets of MPEG4 Encoder/Decoder on DM355, and "the
limitations will not be removed in future realeases", also MPEG4 SP decoder can
only decode streams encoded with DM355 MPEG4 Encoder. Does this mean that MPEG4
Decoder on DM355 can never decode MPEG4 streams from other sources?
Albert, did live555MediaServer work with MPEG4 stream on DM355?
Regards,
Viet Hoang.
"Bansal, Prateek" <[EMAIL PROTECTED]> wrote: v\:*
{behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:*
{behavior:url(#default#VML);} .shape {behavior:url(#default#VML);}
st1\:*{behavior:url(#default#ieooui) } 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
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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
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