RTSP stream for android devices

Thu Aug 16 10:44:52 PDT 2012

Wireshark would help, and you can show "handshaking" RTSP negotiation.
 What happens in RTSP is a client sends a request which if you look @
the RTSP packets it looks like a URI with a specific format.  You'll
want to make sure that that URI looks correct and that the android
video rendering mechanism is configured to receive that specific media
and it's properties.  Also I'm not sure about what application you are
using on the Android side to request a RTSP session and render the
media.  But if you are using an app from Google play I'd read up on
the help if they have it.  Also have a read of RTSP RFC couldn't hurt
either.
/Loren

On Thu, Aug 16, 2012 at 1:37 PM, Chuck Crisler <ccrisler at mutualink.net> wrote:
> Sounds like a job for wireshark.
>
>
> On Thu, Aug 16, 2012 at 1:29 PM, Loren Rogers <loren.rogers at gmail.com>
> wrote:
>>
>> If the log is from the Android device, what it looks like is that the
>> Android device is missing the caps negotiation (probably SDP) that's
>> sent from the RTSP server.  OR the Android device is trying to open a
>> file with poorly formed stream information.
>>
>> On Thu, Aug 16, 2012 at 1:15 PM, John Ruemker <john.ruemker at gmail.com>
>> wrote:
>> > I was wondering if the alawenc audio encoder is the problem, considering
>> > the
>> > android doc states you should use AAC-LC.  However if I try to switch to
>> > ffenc_aac I can't get a stream that even vlc will play.  I'm not really
>> > sure
>> > with rtp payloader goes with ffenc_aac.  So ultimately, I decided to
>> > just
>> > remove the audio stream for now and see if I could get video working.
>> > VLC
>> > plays it fine, but android still won't, so the issue is likely somewhere
>> > in
>> > the x264enc part.
>> >
>> > The logs from the android MediaPlayer and VideoView classes are not very
>> > specific.
>> >
>> >
>> > 08-16 13:12:39.320: D/OpenGLRenderer(30587): Flushing caches (mode 0)
>> > 08-16 13:12:39.350: D/OpenGLRenderer(30587): Flushing caches (mode 1)
>> > 08-16 13:12:45.555: D/libEGL(30783): loaded
>> > /system/lib/egl/libEGL_mali.so
>> > 08-16 13:12:45.555: D/libEGL(30783): loaded
>> > /system/lib/egl/libGLESv1_CM_mali.so
>> > 08-16 13:12:45.560: D/libEGL(30783): loaded
>> > /system/lib/egl/libGLESv2_mali.so
>> > 08-16 13:12:45.635: D/OpenGLRenderer(30783): Enabling debug mode 0
>> > 08-16 13:12:45.645: D/MediaPlayer(30783): Couldn't open file on client
>> > side,
>> > trying server side
>> > 08-16 13:12:45.800: D/MediaPlayer(30783): getMetadata
>> > 08-16 13:12:45.905: E/MediaPlayer(30783): error (1, -2147483648)
>> > 08-16 13:12:45.905: E/MediaPlayer(30783): Error (1,-2147483648)
>> > 08-16 13:12:45.905: D/VideoView(30783): Error: 1,-2147483648
>> >
>> > I guess I'll have to try and play around with the resolution, bitrates,
>> > etc
>> > as you pointed out and see if I can make any progress there.
>> >
>> >
>> > Thanks for your help.
>> >
>> > -John
>> >
>> >
>> > On 08/16/2012 12:35 PM, Chuck Crisler wrote:
>> >
>> > I am not sure about the default x264enc parameters, but you need to
>> > insure
>> > that it is using baseline, width/height/frame/bit rates all as specified
>> > by
>> > the android. I suspect that the defaults are not what the Android wants
>> > and
>> > probably if any is wrong the Android would reject it but VLC will deal
>> > with
>> > it. Can you get a log from the Android to see what it doesn't like?
>> >
>> > On Thu, Aug 16, 2012 at 11:51 AM, John Ruemker <john.ruemker at gmail.com>
>> > wrote:
>> >>
>> >> On 08/15/2012 12:00 PM, John Ruemker wrote:
>> >>>
>> >>> Hello,
>> >>> I am trying to figure out a way to take a local video which may be in
>> >>> one
>> >>> of a few different formats (mkv, mp4, avi) and create an rtsp stream
>> >>> that
>> >>> can be viewed by android devices.  I've been playing around with
>> >>> gstreamer-rtsp-server, and using the test-readme.c example can create
>> >>> a
>> >>> stream from an mkv that is watchable in vlc, but android cannot
>> >>> process it:
>> >>>
>> >>>   gst_rtsp_media_factory_set_launch(factory, "( "
>> >>>   "filesrc location=/home/user/project/spider.mkv ! "
>> >>>   "decodebin name=dec dec. ! queue ! x264enc ! "
>> >>>   "rtph264pay name=pay0 pt=96 dec. ! queue ! audioresample !
>> >>> audioconvert
>> >>> ! "
>> >>>   "alawenc ! rtppcmapay name=pay1 pt=97 "
>> >>>   ")");
>> >>>
>> >>> I'm guessing the way its encoded is not supported by android:
>> >>>
>> >>>
>> >>>
>> >>> http://developer.android.com/guide/appendix/media-formats.html#recommendations
>> >>>
>> >>> While I have done a good bit of reading through the gstreamer docs and
>> >>> understand pipelines and such, I'll admit I don't know much about
>> >>> formats
>> >>> and codecs.  What sort of pipeline should I use to encode the video
>> >>> and
>> >>> audiostreams such that an android device would be able to play it
>> >>> back, per
>> >>> the requirements listed in the above link?
>> >>>
>> >>> Thanks for your help.
>> >>>
>> >>> -John
>> >>
>> >>
>> >> Hi,
>> >> Anyone have any ideas on the above?  I'm just not sure how to go about
>> >> encoding to meet the requirements that are laid out in the Android
>> >> development guide.  Any assistance would be greatly appreciated.
>> >>
>> >> Thanks
>> >>
>> >> -John
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>>
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>> never were and say why not?" - GBS
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"Some men see things as they are and say why. I dream things that
never were and say why not?" - GBS