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List: gstreamer-devel
Subject: Re: Unsynced Audio and Video signals in RTSP Stream
From: vinod kesti via gstreamer-devel <gstreamer-devel () lists ! freedesktop ! org>
Date: 2024-04-23 15:46:31
Message-ID: 1735400834.1779776.1713887191343 () mail ! yahoo ! com
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Try sending SR report. The NTP timestamp in the SR report will help in audio and \
video synchronization.Check rtpbin examples which have SR and RR reort
Sent from Yahoo Mail. Get the app
On Monday, 22 April, 2024 at 03:20:51 pm GMT-5, cfd new via gstreamer-devel \
<gstreamer-devel@lists.freedesktop.org> wrote:
I guess you send out audio and video separately. If yes, you may try to send out \
audio first and then video. Joe
On Thursday, April 18, 2024, 08:13:43 a.m. EDT, Felix Sternkopf via \
gstreamer-devel <gstreamer-devel@lists.freedesktop.org> wrote:
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div.yiv4638044512WordSection1 {}--> Dear GST Community,
i have implemented a rtsp server with the gst-rtsp-server module. The server receives \
an audio signal via an interaudiosrc and a video signal via an intervideosrc:
intervideosrc channel=videosrc à videoconvertà vaapih264enc \
bitrate=5000 zerolatency=trueà rtph264pay pt=96 name=pay0
interaudiosrc channel=audiosrcà opusenc bitrate=64à queueà \
rtpopuspay pt=97 name=pay1
When I try to view the stream via an rtsp client, for example VLC Player the stream \
works, but the audio signal is about 1 second behind the video signal. I already \
tried different audio encoders and different queue parameters like buffer size and \
leaky queues, but nothing solved the problem.
When I start the same pipeline as above but mux both signals and write them into a \
filesink they are synchronized.
I know that the server module internally uses the multiudpsink element. Is there any \
possibility to edit multiudpsink parameters from outside?
Does anybody have any ideas about this problem? I already read every google result I \
could find about it.
Best Regards,
Felix Sternkopf
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<html><head></head><body><div class="ydpb1b69bc8yahoo-style-wrap" \
style="font-family:Helvetica Neue, Helvetica, Arial, \
sans-serif;font-size:13px;"><div><div dir="ltr" data-setdir="false">Try sending SR \
report. The NTP timestamp in the SR report will help in audio and video \
synchronization.</div><div dir="ltr" data-setdir="false">Check rtpbin examples which \
have SR and RR reort</div><div><br></div><div \
class="ydpb1b69bc8signature"><div><br></div><div><br></div><div>Sent from Yahoo Mail. \
<a href="https://yho.com/148vdq" rel="nofollow" target="_blank">Get the \
app</a></div></div></div> <div><br></div><div><br></div>
</div><div id="yahoo_quoted_4535870060" class="yahoo_quoted">
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On Monday, 22 April, 2024 at 03:20:51 pm GMT-5, cfd new via \
gstreamer-devel <gstreamer-devel@lists.freedesktop.org> wrote: </div>
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<div><div id="yiv4638044512"><div><div style="font-family:Helvetica \
Neue, Helvetica, Arial, sans-serif;font-size:13px;" \
class="yiv4638044512ydp78cdc2d0yahoo-style-wrap"><div></div> <div dir="ltr">I guess \
you send out audio and video separately. If yes, you may try to send out audio first \
and then video.</div><div dir="ltr"><br clear="none"></div><div \
dir="ltr"> Joe<br clear="none"></div><div><br clear="none"></div>
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On Thursday, April 18, 2024, 08:13:43 a.m. EDT, Felix \
Sternkopf via gstreamer-devel <gstreamer-devel@lists.freedesktop.org> wrote: \
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<p class="yiv4638044512MsoNormal"><span \
style="font-size:10.0pt;font-family:sans-serif;">Dear GST Community,</span></p> <p \
class="yiv4638044512MsoNormal"><span \
style="font-size:10.0pt;font-family:sans-serif;">i have implemented a rtsp server \
with the gst-rtsp-server module. The server receives an audio signal via an \
interaudiosrc and a video signal via an intervideosrc:</span></p> <p \
class="yiv4638044512MsoNormal"><span \
style="font-size:10.0pt;font-family:sans-serif;">
<i>intervideosrc channel=videosrc </i></span><i><span \
style="font-size:10.0pt;font-family:Wingdings;">Ã </span></i><i><span \
style="font-size:10.0pt;font-family:sans-serif;"> videoconvert </span></i><i><span \
style="font-size:10.0pt;font-family:Wingdings;">Ã </span></i><i><span \
style="font-size:10.0pt;font-family:sans-serif;"> vaapih264enc bitrate=5000 \
zerolatency=true </span></i><i><span \
style="font-size:10.0pt;font-family:Wingdings;">Ã </span></i><i><span \
style="font-size:10.0pt;font-family:sans-serif;"> rtph264pay pt=96 \
name=pay0</span></i></p> <p class="yiv4638044512MsoNormal"><i><span \
style="font-size:10.0pt;font-family:sans-serif;"> \
interaudiosrc channel=audiosrc </span></i><i><span \
style="font-size:10.0pt;font-family:Wingdings;">Ã </span></i><i><span \
style="font-size:10.0pt;font-family:sans-serif;"> opusenc bitrate=64 \
</span></i><i><span style="font-size:10.0pt;font-family:Wingdings;">Ã \
</span></i><i><span style="font-size:10.0pt;font-family:sans-serif;"> queue \
</span></i><i><span style="font-size:10.0pt;font-family:Wingdings;">Ã \
</span></i><i><span style="font-size:10.0pt;font-family:sans-serif;"> rtpopuspay \
pt=97 name=pay1</span></i></p> <p class="yiv4638044512MsoNormal"><span \
style="font-size:10.0pt;font-family:sans-serif;"> </span></p> <p \
class="yiv4638044512MsoNormal"><span \
style="font-size:10.0pt;font-family:sans-serif;">When I try to view the stream via an \
rtsp client, for example VLC Player the stream works, but the audio signal is about 1 \
second behind the video signal. I already tried different audio encoders and \
different queue parameters like buffer size and leaky queues, but nothing solved the \
problem.</span></p> <p class="yiv4638044512MsoNormal"><span \
style="font-size:10.0pt;font-family:sans-serif;">When I start the same pipeline as \
above but mux both signals and write them into a filesink they are \
synchronized.</span></p> <p class="yiv4638044512MsoNormal"><span \
style="font-size:10.0pt;font-family:sans-serif;"> </span></p> <p \
class="yiv4638044512MsoNormal"><span \
style="font-size:10.0pt;font-family:sans-serif;">I know that the server module \
internally uses the multiudpsink element. Is there any possibility to edit \
multiudpsink parameters from outside?</span></p> <p \
class="yiv4638044512MsoNormal"><span \
style="font-size:10.0pt;font-family:sans-serif;">Does anybody have any ideas about \
this problem? I already read every google result I could find about it.</span></p> \
<p class="yiv4638044512MsoNormal"><span \
style="font-size:10.0pt;font-family:sans-serif;"> </span></p> <p \
class="yiv4638044512MsoNormal"><span \
style="font-size:10.0pt;font-family:sans-serif;">Best Regards,</span></p> <p \
class="yiv4638044512MsoNormal"><span \
style="font-size:10.0pt;font-family:sans-serif;">Felix Sternkopf</span></p> </div>
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