[gst-devel] Problem with clockrates in rtp stream

[Morris Ford]

I changed the pipeline to

./test-launch --gst-debug-level=0 "( ximagesrc use-damage=false endx=640
endy=640 startx=100 starty=100 ! video/x-raw-rgb,framerate=10/1 ! queue
max-size-buffers=5 ! ffmpegcolorspace ! videoscale !
video/x-raw-yuv,width=640,height=640 ! ffenc_mpeg4 ! queue ! rtpmp4vpay
name=pay0 pt=96  audiotestsrc is-live=true ! audio/x-raw-int ! faac !
audio/mpeg,mpegversion=4 ! queue ! rtpmp4apay name=pay1 pt=97 )"

There is no audio in the stream. I am using Quicktime on the client side so
I can easily examine the stream type and it shows no audio stream.

On Wed, May 5, 2010 at 9:44 AM, Wim Taymans <wim.taymans at gmail.com> wrote:

> On Wed, 2010-05-05 at 09:28 -0400, Morris Ford wrote:
> > I am trying to stream an mp4v / mp4a rtp stream. The pipeline is at
> > the moment:
> >
> > ./test-launch --gst-debug-level=0 "( ximagesrc use-damage=false
> > endx=640 endy=640 startx=100 starty=100 !
> > video/x-raw-rgb,framerate=10/1 ! queue max-size-buffers=5 !
> > ffmpegcolorspace ! videoscale ! video/x-raw-yuv,width=640,height=640 !
> > ffenc_mpeg4 ! queue ! rtpmp4vpay name=pay0 pt=96 ! rtpmux name=muxer
> > name=pay0 pt=96  audiotestsrc is-live=true !
> > audio/x-raw-int,rate=(int)90000 ! faac ! audio/mpegversion=4 ! queue !
> > rtpmp4apay name=pay1 pt=97 ! muxer. muxer. )"
> >
>
> Don't use rtpmux here, it's not needed and it confuses the server
> because it expects elements with names pay%d to be unlinked elements.
>
> Wim
>
> > The problem I am having is that the audio part is missing. If I remove
> > the caps after the faac plugin, the audio is in the stream. When I
> > look at the startup log I see a clock-rate of 44100 for the mp4a
> > stream and a clock rate of 90000 for the mp4v stream. I am pretty sure
> > this is what is wrong. If I stream with the caps for mpegversion=4
> > removed I see audio and video clockrates both = 90000.
> >
> > How do I get the clockrates to match up?
> >
> > I tried to increase the audio rate to 90000 but it increased to 88200.
> > I tried to reduce the video clock rate but I could not get it to
> > change.
> >
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