<div dir="ltr"><div><div><div>I am trying to get it working on a copy of the same video so streams should have the exact same configuration.<br><br>The error I'm currently getting is the following.<br><br>ERROR: from element /GstPipeline:pipeline0/GstQTDemux:d2: GStreamer encountered a general stream error.<br>Additional debug info:<br>qtdemux.c(5520): gst_qtdemux_loop (): /GstPipeline:pipeline0/GstQTDemux:d2:<br>streaming stopped, reason not-negotiated<br><br></div>Before that it is printing about the sink and src pad for the audio concat c and it's caps filter (audio/mpeg). <br><br></div>Thanks for the help,<br></div>Ross O'Sullivan<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 28 November 2016 at 21:28, Sebastian Dröge <span dir="ltr"><<a href="mailto:sebastian@centricular.com" target="_blank">sebastian@centricular.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="HOEnZb"><div class="h5">On Mon, 2016-11-28 at 14:50 +0000, Ross O Sullivan wrote:<br>
> Hi,<br>
><br>
> I'm making a video editor with the gstreamer C api as part of a University project and I have been having trouble creating a concatenate feature for mp4 files without re-encoding. I was hoping you could point me in the direction of a solution.<br>
><br>
><br>
> My current design of the pipeline is as follows:<br>
><br>
> source1 source2<br>
> demux1 demux2<br>
> video audio video audio<br>
> \ \ / /<br>
> queue<br>
> \ \ / /<br>
> \ x /<br>
> concat Videos concat audio<br>
> \ /<br>
> muxer<br>
> |<br>
> filesink<br>
><br>
> I have tried to create a similar design in gst-launch with the following command but I keep getting stream errors. <br>
><br>
> gst-launch-1.0 -v mp4mux name=mp4 ! filesink location='out.mp4' \<br>
> concat name=c ! audio/mpeg ! mp4.audio_0 \<br>
> concat name=c2 ! video/x-h264 ! mp4.video_0 \<br>
> filesrc location='left.mp4' ! qtdemux name=d1 \<br>
> filesrc location='right.mp4' ! qtdemux name=d2 \<br>
> d1.audio_0 ! audio/mpeg ! queue ! c. \<br>
> d2.audio_0 ! audio/mpeg ! queue ! c. \<br>
> d1.video_0 ! video/x-h264 ! queue ! c2. \<br>
> d2.video_0 ! video/x-h264 ! queue ! c2.<br>
<br>
</div></div>You need to make sure that all streams have exactly the same<br>
configuration. Not just e.g. video width/height, but also the<br>
codec_data must be exactly the same. MP4 does not support changes in<br>
the middle of a stream.<br>
<br>
What kind of stream errors do you get, what do you see in the debug<br>
logs shortly before them?<br>
<span class="HOEnZb"><font color="#888888"><br>
--<br>
Sebastian Dröge, Centricular Ltd · <a href="http://www.centricular.com" rel="noreferrer" target="_blank">http://www.centricular.com</a></font></span><br>______________________________<wbr>_________________<br>
gstreamer-devel mailing list<br>
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<br></blockquote></div><br></div>
<br>
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