On 05/24/2010 11:36 PM, Andy Savage wrote:
In the interests of keeping things together here is the link
<http://groups.google.com/group/android-developers/browse_thread/thread/f963e8f7ac35b75b>
for my thread I started in the developers thread just a few days ago
related to this.
I will file a bug request sometime soon unless anybody else can shed
any light (although I don't know if there will be much attention paid
to it). It is more a feature enhancement than a bug I think, but
it's definitely causing me difficulty.
The functionality to decode RTP streams is already built into OpenCore
but unfortunately you can't pass an SDP file to the MediaPlayer
(OpenCore Wrapper) unless it contains an RTSP stream link inside it.
This is a bit dumb really... what's the point in passing an SDP file
in that case? but ah.
RTSP is not a "stream". It's a command and control protocol. The SDP
announcement(s)
is the payload describing the media to be streamed. SIP also uses SDP.
The flow is:
RTSP/PLAY<------ client
RTSP/SDP -----> client
RTP---------------> client
Where you just listen for the UDP RTP packets on the port the SDP
announcement told you listen on.
Mike
There seems to be a limitation that means that it will only accept SDP
information with RTP streams inside if it gets them from the RTSP
stream (e.g. it gets this information from SETUP in the RTSP protocal).
Thus far it seems the only solution is to dump the RTP packets to a
file (periodically close the file and write a new one) then
periodically open these files in mediaplayer. A pretty ugly hack really!
--
"The greatest challenge to any thinker is stating the problem in a way
that will allow a solution"
- Bertrand Russell
Andy Savage
Cell Phone: +852 936 34341
Skype ID: andy_savage
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On Tue, May 25, 2010 at 2:19 PM, debelyoo <[email protected]
<mailto:[email protected]>> wrote:
Hi Andy,
Good to see that the problem is not only specific to my environment :)
And I hope we could find a solution, or at least one Android engineer
will take a look at this post.
I still stuck on it... I tried on Android 1.6 (G1) and Android 2.1
(HTC Desire). Both do not work.
I'm currently looking into the MediaPlayer sources, to see if I can
get more details about the error and maybe fix the bug myself.
Cheers
Jean
On May 24, 9:45 am, Andy Savage <[email protected]
<mailto:[email protected]>> wrote:
> Hi there,
>
> Any answer to this question? It's bugging me too. Jean, can you tell
> us what version you are testing this on? Have you tried 2.1?
>
> Cheers,
> Andy
>
> On May 6, 3:32 pm, debelyoo <[email protected]
<mailto:[email protected]>> wrote:
>
>
>
> > Hi dillirao,
>
> > I don't receive onPrepared callback.
>
> > After requesting the live stream through the SDP file (http://
> > server_ip/live.sdp) I receive the following callbacks:
> > - onBufferingUpdate --> Buffering 100%
> > - onErrorCallback --> Command PLAYER_INIT completed with an
error or
> > info PVMFErrCorrupt
>
> > My file is encoded in MPEG-4 part 2, audio is AAC, file format
> > is .mp4, resolution is 320x240. I have a bitrate of 700kbps but bw
> > should not be a problem since I'm on Wi-Fi.
> > I can stream the same file with a RTSP request from the Darwin
server.
> > It works smoothly.
>
> > Any idea why the device returns this error ? evn though it can
play
> > the same stream via RTSP ?
>
> > Jean
>
> > On May 5, 3:06 pm, dillirao malipeddi <[email protected]
<mailto:[email protected]>> wrote:
>
> > > did u received OnPrepared callback.
> > > Plz write a onErrorcallback and see, if you get error callback.
>
> > > whats video profile and audio profile you are using.
>
> > > use : h263/h264 15fps; 176x144 or 320x240 and use low bit
rate , on
> > > internet ; if lan, bw is not issu
> > > for audio: use aac/ again try low bit rate encoding;... amr/
is ok...
>
> > > Thanks
>
> > > On Thu, Apr 29, 2010 at 6:32 PM, debelyoo
<[email protected] <mailto:[email protected]>> wrote:
> > > > I try to play a live stream on my android phone using the
MediaPlayer
> > > > object. But I definitely see a black screen. Does anybody
have any
> > > > experience with streaming on Android ?
>
> > > > Here is what I'm doing:
> > > > I broadcast a stream with Darwin streaming server (via
> > > > PlaylistBroadcast) to my Android phone. The stream is sent
over RTP to
> > > > the IP of my device (unicast). A .sdp file describes my
stream.
>
> > > > In my app, I try to play the stream with the following
code where url
> > > > is "rtsp://server_ip/live.sdp"
>
> > > > private void playVideo(String url) {
> > > > try {
> > > > //media.setEnabled(false);
>
> > > > if (player==null) {
> > > > //System.out.println("create
MediaPlayer");
> > > > player=new MediaPlayer();
> > > > player.setScreenOnWhilePlaying(true);
> > > > } else {
> > > > player.stop();
> > > > player.reset();
> > > > }
>
> > > > player.setDataSource(url);
> > > > //holder.setFixedSize(320, 240);
> > > > player.setDisplay(holder);
>
> > > >
player.setAudioStreamType(AudioManager.STREAM_MUSIC);
> > > > player.setOnPreparedListener(this);
> > > > player.prepareAsync();
> > > > player.setOnBufferingUpdateListener(this);
> > > > player.setOnCompletionListener(this);
> > > > } catch (Throwable t) {
> > > > System.out.println("Exception in media prep:
> > > > "+t.toString());
> > > > }
> > > > }
>
> > > > public void onPrepared(MediaPlayer mp) {
> > > > //System.out.println("onPrepared");
>
> > > > int width=player.getVideoWidth();
> > > > int height=player.getVideoHeight();
>
> > > > if (width!=0 && height!=0) {
> > > > holder.setFixedSize(width, height);
> > > > player.start();
> > > > }
> > > > }
>
> > > > I always have a black screen, buffering remains at 0%.
> > > > I checked that I can play this live stream on VLC and QT
on a desktop,
> > > > and it works fine. If I request the same file via a direct
RTSP
> > > > request (rtsp://server_IP/myVideo.mp4) the file plays
correctly on my
> > > > android phone.
>
> > > > I also tried to request the .sdp file by an HTTP request
(http://
> > > > server_IP/live.sdp) but the result is the same (black screen).
>
> > > > Does anybody have already succeeded in playing a live
stream on an
> > > > android phone ?
>
> > > > Cheers
> > > > Jean
>
> > > > --
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> > > --
> > > Thank you,
> > > Dilli Rao. Mwww.arijasoft.com <http://Mwww.arijasoft.com>
>
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