Hi Wei Su,
>From your query, it appears that you are trying to add multiple media
>sub-sessions to a media sub-session. There is a previous post on the same
>topic. Kindly refer to
>http://www.mail-archive.com/live-devel@lists.live555.com/msg03995.html for the
>same.
Please let me know if thi
Huang,
while transmitting the same, NALU headers need to be removed.
NALU header ? you do not mean start code ?
Yes, you are correct. I meant the start code only i.e. 0x00 00 00 01.
Ganesh
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For Quicktime, at beginning, you need to ensure that you send SPS and PPS as
sprop_parameter_sets. Do note that while transmitting the same, NALU headers
need to be removed.
Hope this helps,
Ganesh
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Steve,
My answers below:
>On the receiver end:
>- You need to gather SPS and PPS from SDP once your media sub-session is
>created, which involved base64 decoding and adding a NALU start code
>(dependent on the decoder connected at the output
> of receiver
So I should write it at the beginnin
Hi Tao,
>From RFC 3984, (sprop-parameter-sets)
The value of the parameter is the base64 [6] representation of the initial
parameter set NAL units
as specified in sections 7.3.2.1 and 7.3.2.2 of [1]
This refers to SPS and PPS in H.264 standard. This post shows the description
of sprop_paramet
Hi Steve,
While implementing a streamer out and streamer in for H.264, you need to ensure
the following:
On Server:
- SPS and PPS are used to generate sprop_parameter_sets. The 2 parameter sets
i.e. SPS and PPS should be encoded in base-64 format with a comma separating
the two. Do note that S
Hello Deepti,
MPA means that the media sub-session is of MPEG Audio type (MPEG-1,2,3). For
more information, refer RFC 3555 sec 4.1.7.
Hope this helps,
Ganesh
From: "deepti.saras...@sdc.canon.co.in"
To: LIVE555 Streaming Media - development & use
Sent: Thur
Hi Ross,
>From your previous post,
> The standard solution to this problem is for the RTSP server to include the
> data for these special PPS/SPS NAL units in the SDP description > that gets
> returned in response to a RTSP "DESCRIBE" command. (This is done in a
> "a=fmtp:" line, using the
Hi Khalid,
I analyzed the file provided by you separately and found following potential
issues:
1) The profile_and_level_indication after the VOS Start code is F5 which is
reserved (refer Table G-1 in the MPEG4 Standard). I tried streaming after
modifying this too, but same issues.
2) In you
Dear Experts,
I am trying to stream out an audio and a video stream in a single SDP sessions
and would like add these as two separate media sub-sessions. Based on my
understanding, I plan to try the following:
sms = ServerMediaSession::createNew()
sms->addSubsession(AudioMediaSubsession::c
Dear Experts,
Does the current livemedia library support HTTP streaming (as compared to
RTSP)? My objective is to transmit an XML file and hence, I am look for more
details on the same.
Is there any example implementation in Livemedia package which I can refer for
more information?
Thanks,
Ga
Hi Khalid,
You can refer to the openRTSP example which provides a good starting point for
the receiver. However, there is a catch. In case of MPEG4, some additional data
is received initially, which requires to be added to the bitstream. Does your
application cater to the same? I presume you ar
Hi Kamil,
In Livemedia exmaple applications, you attach a 0x00 00 00 01 after you receive
the packet. In the packet which you received, the first octet is as per the
standard which has F, NRI, NALU Type. Attaching the pattern above (which is
actually NALU start code) is for file dump cases.
D
Dear all,
I have finally been able to get H.264 Streaming working with Quicktime, thanks
to Ross' inputs. There was an inherent issue in my implementation which QT was
not able to ignore. While transmitting NALUs, 2 points have to be remembered.
One is to remove the NALU start code and another
Dear Experts,
I am currently building a real-time system where in an encoder is connected to
a streaming server. The encoded data in H.264 format is streamed out using
Livemedia library.
For the same, I have implemented a class which derives FramedSource. In
"doGetNextFrame" function of my cla
Hi Ross,
Many thanks for your input. I could understand how H264VideoFileSink was
inserting the start code. However, I want to confirm one small doubt. NALU
start code wasn't found in the incoming stream as the server didn't insert in
the streamed out data and "not" because livemedia library st
Dear Experts,
I am trying to demux an incoming stream into individual video and audio
streams. I have created 2 sinks for the same and am able to set it up also.
However, I am facing a small issue.
When I dump the video stream and observe the same, I observe that I am able to
get SPS, PPS and
Dear Experts,
I have a doubt. When I am trying to debug RTSP streaming with QT (which I am
still unable to achieve), I found one difference between QT and VLC setup.
The SDP information when I connected using QT is as follows:
a=rtpmap:96 H264/9
a=fmtp:96
packetization-mode=1;profile-leve
Dear Experts,
I am trying to decode an incoming stream over RTSP. When I checked the SDP
description, I observed that there are 2 media subsessions like H.264 and
G.711. To decode the same, I am trying to connect 2 separate sinks for each of
the individual sub-sessions.
Is my idea of implement
I tried one more experiment couple of days back. I dumped a stream prepared for
RTSP streaming using QT Pro and analyzed the same. When I analyzed the stream,
I found that after sprop_parameter_sets, some elements of "hinf" atom from QTFF
were present in the stream. I am not sure if this is real
and height. However, I observe a green screen and unable to
view the video. Has anyone faced this issue before and solved the same?
Thanks.
____
From: Ganesh V
To: live-de...@ns.live555.com
Sent: Wednesday, May 6, 2009 9:28:56 PM
Subject: [Live-devel] H.264 RTSP Stre
Dear Experts,
Currently, I am trying to achieve generic RTSP H.264 Streaming functionality
based on Livemedia. Based on the available literature, I figured that my
application needs to generate sprop-parameter-sets for SDP. From livemedia
sources, I observed that in H264VideoRTPSink (constructo
Thank you, Ross. Windows firewall was indeed the issue. I switched off the
windows firewall and was able to play the streams in QT. I will proceed with
debugging my application with QT.
Thanks,
Ganesh
From: Ross Finlayson
To: LIVE555 Streaming Media - develo
Hello Ross,
Many thanks for your pointer. I enabled debug and retried my experiments with
VLC, QT and Windows Media Player. From the logs, I observed the following.
After connection is setup,
- both VLC and QT send DESCRIBE command with bytes and parseRTSPRequestString
returns DESCRIBE command
My device is a DSP chip but not a TI one. However, for my experiment with
live555MediaServer, I used my laptop to stream out the data and used VLC on my
laptop and other machines to test.
From: Vitor Carvalho
To: live-de...@ns.live555.com
Sent: Monday, May 4,
Dear Experts,
I am trying to stream out MPEG4/H.264 streams from my application on a device
using livemedia stack. I am able to play the streams without any issues using
VLC player and my own player based of Livemedia stack. However, when I try to
play the same using a Quicktime player, I obser
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