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Message from discussion About the RTSP
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Megha Joshi  
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 More options Mar 24 2008, 7:31 pm
From: "Megha Joshi" <mjo...@google.com>
Date: Mon, 24 Mar 2008 16:31:30 -0700
Local: Mon, Mar 24 2008 7:31 pm
Subject: Re: [android-challenge] Re: About the RTSP
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 Hi,

An update on the streaming feature in MediaPlayer. The MediaPlayer /
VideoView only support  "progressive streamable contents", which has to
satisfy two criterion:
1. the movie atom has to precede all the media data atoms;
2. the clip has to be reasonably interleaved;

Here is a simple way to tell whether a file is "progressive streamable
contents" type of content. If there are any "mdat" string before "moov"
string, then it is NOT progressive streamable contents. (As shown in the
examples here)

*Not progressive streamable content:*
$ strings /tmp/3.3gp |grep -n "mdat\|moov"
16:mdat
17:mdat
18:mdat
2278:WHmdat<c
2617:moov
*
Progressive streamable content:*
$ strings /sdcard/box.mp4 |grep -n "mdat\|moov"
3:#moov
99:mdat
101:mdat

A following test URLs that I received from this group earlier are not
Progressive Streamable Content.

1)
http://download-v5.streamload.com/x7Hxsaah~FI2O~568g~4Vxg~KO4LKISs-nr...<http://www.google.com/url?q=http%3A%2F%2Fdownload-v5.streamload.com%2...>
2) http://www.daily3gp.com/vids/3.3gp<http://www.google.com/url?q=http%3A%2F%2Fwww.daily3gp.com%2Fvids%2F3....>

Thanks,
Megha

On Sat, Mar 22, 2008 at 2:54 PM, Megha Joshi <mjo...@google.com> wrote:
> Hi,

> Streaming does not work for certain mp4 URLs that I got from this forum. I
> am not sure why this is happening yet, I have logged a bug internally with
> those test URLs included.

> Thanks,
> Megha

> On Sat, Mar 22, 2008 at 10:14 AM, q2dm1 <trevo.pa...@gmail.com> wrote:

> > As far as I know, nobody managed to get mp4 streaming working yet. Are
> > there any new insights?

> > On Mar 22, 2:41 pm, Jake <jakehsi...@gmail.com> wrote:
> > > Hi, Megha Joshi

> > > Thanks for your replying.
> > > The SDK is not going to support the RTSP , is it?
> > > Then, we would not be able to fix our problem.
> > > But, thanks anyway.
> > > Maybe we could find out any other solutions.
> > > Thank you very much.

> > > Jake

> > > On Mar 21, 8:37 am, Megha Joshi <androidsupp...@gmail.com> wrote:

> > > > No, it does not mean that :) I just wanted to explain why the Media
> > > > APIs did not support RTSP.

> > > > On Mar 20, 5:52 pm, "Cow Bay" <nmlg...@gmail.com> wrote:

> > > > > Does this imply that any protocol other than http/tcp should be
> > strictly
> > > > > avoided and submitted applications using procotol other than
> > http/tcp will
> > > > > have negative evalution for the challenge?

> > > > > ----- Original Message -----
> > > > > From: "Megha Joshi" <androidsupp...@gmail.com>
> > > > > To: "Android Challenge" <android-challenge@googlegroups.com>
> > > > > Sent: Thursday, March 20, 2008 1:52 PM
> > > > > Subject: [android-challenge] Re: About the RTSP

> > > > > > Hi,

> > > > > > Many carriers block the RTSP traffic, but they never block the
> > HTTP
> > > > > > traffic as its needed for the Internet applications like email,
> > chat
> > > > > > etc. to work. That is the reason, the framework supports HTTP
> > > > > > streaming only.

> > > > > > Thanks,
> > > > > > Megha

> > > > > > On Mar 19, 9:05 am, "Hsiao Hsu-ho" <jakehsi...@gmail.com> wrote:
> > > > > > > Dear Android-challenge

> > > > > > > We are facing a big problem about "Real Time Streaming
> > Protocol".
> > > > > > > We would like to use the protocol in our application. But
> > sadly, the SDK
> > > > > > > didn't support this protocol. Could you explain to us when the
> > SDK will
> > > > > > > support this protocol or why the SDK didn't support the
> > protocol?

> > > > > > > Best wishes,

> > > > > > > Jake


 
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