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You're trying to force the output of decodebin to have a specific
pixel format, before any video conversion<br>
can take place, that's probably your issue here :)<br>
<br>
<div class="moz-cite-prefix">On 8/28/19 7:43 PM, Carl Karsten wrote:<br>
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cite="mid:CADmzSShqG_8yanQH__OTLAN+9fT+n8j6rtK4W0hNd=E3gZSv0Q@mail.gmail.com">
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<p>I encoded a 26min movie v1.mp4. Then I cut out 1 min from
9:00 to 10:00 and added fad out/in and encoded to v2.mp4<br>
</p>
<p>Now I have AV sync problems that I can see at 7:00 I was
doing some other work and noticed the video hiccup a little:
it paused then jumped and was back in sync.</p>
<p>To try and narrow down where the problem is, I’d like to
compare v1/v2 frame by frame and look for differences. There
shouldn’t be any until the fade at 9:00.</p>
<p>Which is why I am trying this, but stuck on an error:</p>
<pre>$ gst-launch-1.0 -e \
> filesrc location=v1.mp4 ! qtdemux ! decodebin ! \
> video/x-raw, format=RGBA ! videoconvert ! mix. \
> filesrc location=v2.mp4 ! qtdemux ! decodebin ! \
> video/x-raw, format=RGBA ! videoconvert ! mix. \
> frei0r-mixer-difference name=mix ! \
> fakesink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Redistribute latency...
Redistribute latency...
Redistribute latency...
ERROR: from element /GstPipeline:pipeline0/GstQTDemux:qtdemux1: Internal data stream error.
Additional debug info:
qtdemux.c(5850): gst_qtdemux_loop (): /GstPipeline:pipeline0/GstQTDemux:qtdemux1:
streaming stopped, reason not-negotiated (-4)
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...
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-- <br>
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data-smartmail="gmail_signature">
<div dir="ltr"><span>Carl K<br>
</span></div>
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