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decode rtsp video stream from IP camera

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Stefan Ulbrich

decode rtsp video stream from IP camera

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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Olivier Crête-3

Re: decode rtsp video stream from IP camera

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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Olivier Crête
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Gst-Geek

Re: decode rtsp video stream from IP camera

In reply to this post by Stefan Ulbrich

Hi Stefan,

Use videoconvert and videoscale before the autovideosink for appropriate
conversion.

Also
rtsp decoding is slightly complicated. Use uridecodebin instead.
gst-launch-1.0 rtspsrc --gst-debug=3 uridecodebin
uri="rtsp://admin@admin:192.168.42.3:554/1/h264major" ! videoconvert !
videoscale !! autovideosink

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Stefan Ulbrich

Re: decode rtsp video stream from IP camera

In reply to this post by Olivier Crête-3

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 <[hidden email]> 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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Stefan Ulbrich

Re: decode rtsp video stream from IP camera

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 <[hidden email]> 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 <[hidden email]> 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)
_______________________________________________
gstreamer-devel mailing list
[hidden email]
https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

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gstreamer-devel mailing list
[hidden email]
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