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unable to view compressed image in web mjpeg_server

asked 2020-04-12 04:59:10 -0500

dinesh

932 ●201 ●254 ●280 http://vikatrobotics.com

I have installed and run the mjpeg_server in my pi 4b and ubuntu 18 machie. in pi i am using image_transport node to publish image. after that i ran mjpeg_server node in pi. But when i try to view the compressed image in web i can't access it.

I can easily view the raw image with given url in chromium browser:

http://192.168.4.1:8181/stream?topic=/camera/image

But i can't access the compressed image with url:

http://192.168.4.1:8181/stream?topic=/camera/image/compressed

So how should i view the compressed image topic in web which is running on the pi 4.

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What version of ROS are you using?

viktor.holova ( 2020-04-14 04:47:53 -0500 )edit

ros melodic.

dinesh ( 2020-04-14 12:33:19 -0500 )edit

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answered 2020-04-14 06:17:49 -0500

viktor.holova

201 ●9 ●10 https://www.ge.com/res...

Because you are using Ubuntu 18, I am assuming you are using ROS Melodic.

Starting with ROS Kinetic web_video_server is a replacement of mjpeg_server

Maybe that is not exactly what you are looking for but from my web_video_server experience I know you can view compressed image topic by adding &type=ros_compressed to the URL.

So I hope that following URL will also work for you in mjpeg_server case:

http://192.168.4.1:8181/stream?topic=/camera/image&type=ros_compressed

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is this also possible to stream audio instead of only video? what package? i'll try that in few moment by the way.

dinesh ( 2020-04-14 12:34:57 -0500 )edit

web_video_server is only video as far as I know. Not sure about audio

viktor.holova ( 2020-04-14 13:15:45 -0500 )edit

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Asked: 2020-04-12 04:59:10 -0500

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Last updated: Apr 14 '20

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