[uvch264src in 1.1.1.1] "Got data flow before segment event" warnings until crash

[Robert Krakora]

I was looking at the resizing of the GstBuffers that v4l2src does today...


On Tue, Jul 23, 2013 at 5:46 PM, Peter Rennert <p.rennert at cs.ucl.ac.uk>wrote:

> I tried today to have another look at the issue. I sent an email to
> Youness (the developer of the 0.10 version) and he came back to me
> yesterday, saying that neither he nor the person who ported it to 1.0 has a
> camera to test. So the problem will not get fixed "automatically". But he
> thinks that there is an issue with the negotiation. And it should not be a
> big deal. I have no idea how Gstreamer works internally, but I would like
> to give it a shot.
>
> I was also thinking about reasons why it always and consistently fails
> after 35sec. I have the suspicion that the camera sends at that time a
> keyframe. And that crashes the pipeline somehow. That might also be
> something that is different to MJPEG encoding which probably does not fail.
>
> I tried to confirm this, but I had problems to make uvch264src running in
> my (python) pipeline that I wanted to use for this simple testing. I will
> come back to this tomorrow. Stay tuned.
>
> krakorar <rob.krakora at messagenetsystems.com> wrote:
>>
>> Oops...had a type-o in the gst-launch-1.0 line...it still streams for about
>> 35 seconds and then this happens:
>>
>> ERROR: from element
>> /GstPipeline:pipeline0/GstUvcH264Src:src/GstUvcH264MjpgDemux:uvch264mjpgdemux0:
>> Not enough data to read marker content
>> Additional debug info:
>> gstuvch264_mjpgdemux.c(507): gst_uvc_h264_mjpg_demux_chain ():
>> /GstPipeline:pipeline0/GstUvcH264Src:src/GstUvcH264MjpgDemux:uvch264mjpgdemux0
>>
>>
>>
>> --
>> View this message in context: http://gstreamer-devel.966125.n4.nabble.com/uvch264src-in-1-1-1-1-Got-data-flow-before-segment-event-warnings-until-crash-tp4660982p4661224.html
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> --
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>
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-- 
Rob Krakora
MessageNet Systems
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