Notes on using GST launch

In today's tx2 Connect the camera （ Microsoft's camera ）, You can directly use the following instructions ：

• gst-launch-1.0 v4l2src device=/dev/video0 ! autovideosink

later , Connect the camera to the notebook （macbook pro,parallel Use in ubuntu）, The corresponding device route , You will also report mistakes. , Then I tried autovideosink Switch to xvimagesink perhaps ximagesink Neither. , Will report some different errors , such as

ERROR: Pipeline doesn't want to pause.

ERROR: from element /GstPipeline:pipeline0/GstXvImageSink:xvimagesink0: Could not initialise Xv output

ERROR: Pipeline doesn't want to pause.

ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Could not negotiate format

 ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Internal data flow error.

later , Turn to this article  https://blog.csdn.net/meng_tianshi/article/details/80142005, It says

ffmpegcolorspace ： Plug in for color conversion Filter for converting multiple color formats , Camera device video data is usually used YUV Color format , The monitor usually uses RGB Color format

So use the following code , It's on my computer , The camera is finally working

gst-launch v4l2src device=/dev/video1 ! ffmpegcolorspace ! autovideosink 

P.S. gst-launch、gst-launch-0.1、gst-launch-1.0 I'm all over it ... As for those that can be installed differently , This remains to be studied ...