Gstreaming - two web cams over tcp
I'm trying to stream two web cams on a single gstreaming command, I'm able to start a single camera with :
gst-launch-1.0 v4l2src device=/dev/video0 ! videoconvert ! videoscale ! video/x-raw,width=320,height=240 ! vp8enc ! webmmux ! tcpserversink port=8080
The idea was to start another camera but on a different path, could be IP or PORT, but by standards i tried only different port:
gst-launch-1.0 tee name=stream v4l2src device=/dev/video0 ! video/x-raw,width=640,height=480,framerate=12/1 ! vp8enc ! webmmux ! tcpserversink port=8080 stream. v4l2src device=/dev/video2 ! video/x-raw,width=640,height=480,framerate=12/1 ! vp8enc ! webmmux ! tcpserversink port=8081 stream.
Using webm output and muxer is required
But i always get this error: Unexpected reference "stream" ignoring
Following this pattern i found here
gst-launch-1.0 tee name=stream v4l2src device=/dev/video0 ! image/jpeg,width=800,height=600,framerate=30/1 ! jpegparse ! jpegdec ! xvimagesink stream. v4l2src device=/dev/video1 ! image/jpeg,width=800,height=600,framerate=30/1 ! jpegparse ! jpegdec ! xvimagesink stream.
linux webcam gstreamer v4l2
asked Feb 4 at 18:40
Bruno CerkBruno Cerk
11
add a comment |
I'm trying to stream two web cams on a single gstreaming command, I'm able to start a single camera with :
gst-launch-1.0 v4l2src device=/dev/video0 ! videoconvert ! videoscale ! video/x-raw,width=320,height=240 ! vp8enc ! webmmux ! tcpserversink port=8080
The idea was to start another camera but on a different path, could be IP or PORT, but by standards i tried only different port:
gst-launch-1.0 tee name=stream v4l2src device=/dev/video0 ! video/x-raw,width=640,height=480,framerate=12/1 ! vp8enc ! webmmux ! tcpserversink port=8080 stream. v4l2src device=/dev/video2 ! video/x-raw,width=640,height=480,framerate=12/1 ! vp8enc ! webmmux ! tcpserversink port=8081 stream.
Using webm output and muxer is required
But i always get this error: Unexpected reference "stream" ignoring
Following this pattern i found here
gst-launch-1.0 tee name=stream v4l2src device=/dev/video0 ! image/jpeg,width=800,height=600,framerate=30/1 ! jpegparse ! jpegdec ! xvimagesink stream. v4l2src device=/dev/video1 ! image/jpeg,width=800,height=600,framerate=30/1 ! jpegparse ! jpegdec ! xvimagesink stream.
linux webcam gstreamer v4l2
asked Feb 4 at 18:40
Bruno CerkBruno Cerk
11
add a comment |
I'm trying to stream two web cams on a single gstreaming command, I'm able to start a single camera with :
gst-launch-1.0 v4l2src device=/dev/video0 ! videoconvert ! videoscale ! video/x-raw,width=320,height=240 ! vp8enc ! webmmux ! tcpserversink port=8080
The idea was to start another camera but on a different path, could be IP or PORT, but by standards i tried only different port:
gst-launch-1.0 tee name=stream v4l2src device=/dev/video0 ! video/x-raw,width=640,height=480,framerate=12/1 ! vp8enc ! webmmux ! tcpserversink port=8080 stream. v4l2src device=/dev/video2 ! video/x-raw,width=640,height=480,framerate=12/1 ! vp8enc ! webmmux ! tcpserversink port=8081 stream.
Using webm output and muxer is required
But i always get this error: Unexpected reference "stream" ignoring
Following this pattern i found here
gst-launch-1.0 tee name=stream v4l2src device=/dev/video0 ! image/jpeg,width=800,height=600,framerate=30/1 ! jpegparse ! jpegdec ! xvimagesink stream. v4l2src device=/dev/video1 ! image/jpeg,width=800,height=600,framerate=30/1 ! jpegparse ! jpegdec ! xvimagesink stream.
linux webcam gstreamer v4l2
asked Feb 4 at 18:40
Bruno CerkBruno Cerk
11
I'm trying to stream two web cams on a single gstreaming command, I'm able to start a single camera with :
gst-launch-1.0 v4l2src device=/dev/video0 ! videoconvert ! videoscale ! video/x-raw,width=320,height=240 ! vp8enc ! webmmux ! tcpserversink port=8080
The idea was to start another camera but on a different path, could be IP or PORT, but by standards i tried only different port:
gst-launch-1.0 tee name=stream v4l2src device=/dev/video0 ! video/x-raw,width=640,height=480,framerate=12/1 ! vp8enc ! webmmux ! tcpserversink port=8080 stream. v4l2src device=/dev/video2 ! video/x-raw,width=640,height=480,framerate=12/1 ! vp8enc ! webmmux ! tcpserversink port=8081 stream.
Using webm output and muxer is required
But i always get this error: Unexpected reference "stream" ignoring
Following this pattern i found here
gst-launch-1.0 tee name=stream v4l2src device=/dev/video0 ! image/jpeg,width=800,height=600,framerate=30/1 ! jpegparse ! jpegdec ! xvimagesink stream. v4l2src device=/dev/video1 ! image/jpeg,width=800,height=600,framerate=30/1 ! jpegparse ! jpegdec ! xvimagesink stream.
linux webcam gstreamer v4l2
linux webcam gstreamer v4l2
asked Feb 4 at 18:40
Bruno CerkBruno Cerk
11
asked Feb 4 at 18:40
Bruno CerkBruno Cerk
11
asked Feb 4 at 18:40
Bruno CerkBruno Cerk
11
asked Feb 4 at 18:40
Bruno CerkBruno Cerk
11
asked Feb 4 at 18:40
Bruno CerkBruno Cerk
11
11
add a comment |
add a comment |
1 Answer
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I'd recommend reading the gst-launch syntax (https://gstreamer.freedesktop.org/documentation/tools/gst-launch.html) to get a better understanding of the error there. You create an element and give it a name: stream. Then you use this reference throughout your pipeline description.
Let's look at this part:
jpegdec ! xvimagesink stream. v4l2src device=/dev/video1 ! image/jpeg,width=800,height=600,framerate=30/1
You are linking a jpegdec to xvimagesink and then you have a reference to stream right there. Then you are creating a v4l2src and linking to a capsfilter. The "stream" element you just referenced there in the middle isn't doing anything sitting there, not being linked to anyone. So this is invalid syntax and it fails.
I believe you actually don't want the tee element, so you could entirely remove it and its references. This is what tee is useful for: https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-plugins/html/gstreamer-plugins-tee.html
Additionally, you could also have 2 separate pipelines, one for each camera. Doing it on one or two depends on how you want to manage and if they need to share some pipeline-related data, such as a clock. But that depends on your use case which I don't know deeply.
answered Feb 5 at 21:51
thiagossthiagoss
1011
Thanks for your answer, the piece of code you commented about is from the topic that i linked, its not mine, i just used it as a base to create mine
– Bruno Cerk
Feb 7 at 12:09
The sample you mentioned (the 2nd one). Also contains the stream element.
– thiagoss
Feb 7 at 20:19
add a comment |
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1 Answer
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1 Answer
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I'd recommend reading the gst-launch syntax (https://gstreamer.freedesktop.org/documentation/tools/gst-launch.html) to get a better understanding of the error there. You create an element and give it a name: stream. Then you use this reference throughout your pipeline description.
Let's look at this part:
jpegdec ! xvimagesink stream. v4l2src device=/dev/video1 ! image/jpeg,width=800,height=600,framerate=30/1
You are linking a jpegdec to xvimagesink and then you have a reference to stream right there. Then you are creating a v4l2src and linking to a capsfilter. The "stream" element you just referenced there in the middle isn't doing anything sitting there, not being linked to anyone. So this is invalid syntax and it fails.
I believe you actually don't want the tee element, so you could entirely remove it and its references. This is what tee is useful for: https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-plugins/html/gstreamer-plugins-tee.html
Additionally, you could also have 2 separate pipelines, one for each camera. Doing it on one or two depends on how you want to manage and if they need to share some pipeline-related data, such as a clock. But that depends on your use case which I don't know deeply.
answered Feb 5 at 21:51
thiagossthiagoss
1011
Thanks for your answer, the piece of code you commented about is from the topic that i linked, its not mine, i just used it as a base to create mine
– Bruno Cerk
Feb 7 at 12:09
The sample you mentioned (the 2nd one). Also contains the stream element.
– thiagoss
Feb 7 at 20:19
add a comment |
I'd recommend reading the gst-launch syntax (https://gstreamer.freedesktop.org/documentation/tools/gst-launch.html) to get a better understanding of the error there. You create an element and give it a name: stream. Then you use this reference throughout your pipeline description.
Let's look at this part:
jpegdec ! xvimagesink stream. v4l2src device=/dev/video1 ! image/jpeg,width=800,height=600,framerate=30/1
You are linking a jpegdec to xvimagesink and then you have a reference to stream right there. Then you are creating a v4l2src and linking to a capsfilter. The "stream" element you just referenced there in the middle isn't doing anything sitting there, not being linked to anyone. So this is invalid syntax and it fails.
I believe you actually don't want the tee element, so you could entirely remove it and its references. This is what tee is useful for: https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-plugins/html/gstreamer-plugins-tee.html
Additionally, you could also have 2 separate pipelines, one for each camera. Doing it on one or two depends on how you want to manage and if they need to share some pipeline-related data, such as a clock. But that depends on your use case which I don't know deeply.
answered Feb 5 at 21:51
thiagossthiagoss
1011
Thanks for your answer, the piece of code you commented about is from the topic that i linked, its not mine, i just used it as a base to create mine
– Bruno Cerk
Feb 7 at 12:09
The sample you mentioned (the 2nd one). Also contains the stream element.
– thiagoss
Feb 7 at 20:19
add a comment |
I'd recommend reading the gst-launch syntax (https://gstreamer.freedesktop.org/documentation/tools/gst-launch.html) to get a better understanding of the error there. You create an element and give it a name: stream. Then you use this reference throughout your pipeline description.
Let's look at this part:
jpegdec ! xvimagesink stream. v4l2src device=/dev/video1 ! image/jpeg,width=800,height=600,framerate=30/1
You are linking a jpegdec to xvimagesink and then you have a reference to stream right there. Then you are creating a v4l2src and linking to a capsfilter. The "stream" element you just referenced there in the middle isn't doing anything sitting there, not being linked to anyone. So this is invalid syntax and it fails.
I believe you actually don't want the tee element, so you could entirely remove it and its references. This is what tee is useful for: https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-plugins/html/gstreamer-plugins-tee.html
Additionally, you could also have 2 separate pipelines, one for each camera. Doing it on one or two depends on how you want to manage and if they need to share some pipeline-related data, such as a clock. But that depends on your use case which I don't know deeply.
answered Feb 5 at 21:51
thiagossthiagoss
1011
I'd recommend reading the gst-launch syntax (https://gstreamer.freedesktop.org/documentation/tools/gst-launch.html) to get a better understanding of the error there. You create an element and give it a name: stream. Then you use this reference throughout your pipeline description.
Let's look at this part:
jpegdec ! xvimagesink stream. v4l2src device=/dev/video1 ! image/jpeg,width=800,height=600,framerate=30/1
You are linking a jpegdec to xvimagesink and then you have a reference to stream right there. Then you are creating a v4l2src and linking to a capsfilter. The "stream" element you just referenced there in the middle isn't doing anything sitting there, not being linked to anyone. So this is invalid syntax and it fails.
I believe you actually don't want the tee element, so you could entirely remove it and its references. This is what tee is useful for: https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-plugins/html/gstreamer-plugins-tee.html
Additionally, you could also have 2 separate pipelines, one for each camera. Doing it on one or two depends on how you want to manage and if they need to share some pipeline-related data, such as a clock. But that depends on your use case which I don't know deeply.
answered Feb 5 at 21:51
thiagossthiagoss
1011
answered Feb 5 at 21:51
thiagossthiagoss
1011
answered Feb 5 at 21:51
thiagossthiagoss
1011
answered Feb 5 at 21:51
thiagossthiagoss
1011
1011
Thanks for your answer, the piece of code you commented about is from the topic that i linked, its not mine, i just used it as a base to create mine
– Bruno Cerk
Feb 7 at 12:09
The sample you mentioned (the 2nd one). Also contains the stream element.
– thiagoss
Feb 7 at 20:19
add a comment |
Thanks for your answer, the piece of code you commented about is from the topic that i linked, its not mine, i just used it as a base to create mine
– Bruno Cerk
Feb 7 at 12:09
The sample you mentioned (the 2nd one). Also contains the stream element.
– thiagoss
Feb 7 at 20:19
Thanks for your answer, the piece of code you commented about is from the topic that i linked, its not mine, i just used it as a base to create mine
– Bruno Cerk
Feb 7 at 12:09
Thanks for your answer, the piece of code you commented about is from the topic that i linked, its not mine, i just used it as a base to create mine
– Bruno Cerk
Feb 7 at 12:09
The sample you mentioned (the 2nd one). Also contains the stream element.
– thiagoss
Feb 7 at 20:19
The sample you mentioned (the 2nd one). Also contains the stream element.
– thiagoss
Feb 7 at 20:19
add a comment |
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