decode rtsp video stream from IP camera

[Stefan Ulbrich]

I tried the same commands with both cameras on Ubuntu 18.04 – here they
work perfectly fine (but it consumes quite a lot of resources–is there
hardware acceleration possible?).

Nevertheless, I would love to locate the error source and use a custom
build of gstreamer. How could I further debug into the problem?



On Tue, Jul 17, 2018 at 12:49 PM Stefan Ulbrich <stefan.ulbrich at acceptto.com>
wrote:

> Hi
>
> Thanks for the answer. That did not change the output at all. It seems
> that it is the input that comes into the decoder that is incompatible
>
> gst-launch-1.0 rtspsrc --gst-debug=3 [...] ! rtph264depay ! fakesink
> silent=false -v
>
> produces:
> > /GstPipeline:pipeline0/GstFakeSink:fakesink0: last-message = chain
>  ******* (fakesink0:sink) (12632 bytes, dts: none, pts: 0:00:03.014234812,
> duration: none, offset: -1, offset_end: -1, flags: 00002000 delta-unit ,
> meta: none) 0x7f1ea8076520
>
> Sometimes (nondeterministicly), I get "ERROR  libav :0:: no frame!"
>
> Best
> Stefan
>
> On Mon, Jul 16, 2018 at 9:59 PM Olivier Crête <olivier.crete at collabora.com>
> wrote:
>
>> Hi,
>>
>> Try doing "avdec_h264 ! videoconvert ! videoscale ! autovideosink", your
>> video sink may not support the color format or size of the video so you may
>> require a software conversion or scaling.
>>
>> Olivier
>>
>> On Mon, 2018-07-16 at 20:05 +0200, Stefan Ulbrich wrote:
>>
>> Hi
>>
>> I am trying to display a RTSP stream from two different onvif cameras
>> which I start with
>>
>> gst-launch-1.0 rtspsrc --gst-debug=3 user-id="admin" user-pw="admin"
>> location="rtsp://192.168.42.3:554/1/h264major" ! rtph264depay !
>> h264parse !  avdec_h264 ! autovideosink  # (with and w/h264parse)
>>
>> The output shows a repeating
>>
>> 0:00:05.663361958 11664 0x7f44600014a0 WARN            videodecoder
>> gstvideodecoder.c:732:gst_video_decoder_setcaps:<avdec_h264-0> Subclass
>> refused caps
>>
>> Both streams can be displayed with mplayer and vlc
>>
>> Any advice how to debug the problem?
>>
>> Best
>> Stefan
>>
>> PS:
>>
>>    - Ubuntu 16.04
>>    - Gst-Build (1.14 branch)
>>    - FFMPEG (release/3.4 branch, newer version failed to build)
>>
>>
>>
>> _______________________________________________
>>
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>>
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>>
>> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>
>>
>>
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