[QUESTION] 'kvssink' plugin not built correctly

[hwanders97]

I followed the instructions to build the kvssink plugin on my Mac:

1. Install all of the dependency libraries (including gstreamer)
2. Run cmake .. -DBUILD_GSTREAMER_PLUGIN=TRUE in the build directory
3. Run make in the build directory
   • libgstkvssink.so is in the build directory
4. I set GST_PLUGIN_PATH correctly: /Users/hwanders/workplace/KVSDemo/amazon-kinesis-video-streams-producer-sdk-cpp/build
5. I set LD_LIBRARY_PATH correctly: /Users/hwanders/workplace/KVSDemo/amazon-kinesis-video-streams-producer-sdk-cpp/open-source/local/lib

Running gst-inspect-1.0 kvssink or any other gstreamer command with kvssink yields: No such element or plugin 'kvssink'

Can you let me know how I can fix this? Thank you!

[MushMal]

This is rather strange. Seems like you are using the proper instructions to set the paths defined here: https://github.com/awslabs/amazon-kinesis-video-streams-producer-sdk-cpp#loading-element

Don you happen to have an older GStreamer installed on the system somewhere?

[hwanders97]

Running gst-launch-1.0 --gst-version results in GStreamer Core Library version 1.16.2

I had previously tried running the install-script and min-install-script of the older version of this library. Could that have impacted my environment?

[MushMal]

It might have issues if you are running gst-launch from one version but linked the library to another. As I am out of ideas assuming you double checked the paths, I recommend wiping the old gstreamer out and starting from scratch

[hwanders97]

I ran brew uninstall gstreamer gst-plugins-base gst-plugins-good gst-plugins-bad gst-plugins-ugly gst-libav Then reinstalled gstreamer and gst-plugins-*. After cmake and make again I still see No such element or plugin 'kvssink'.

Can you tell me what version of the gstreamer I need? Or how I can check where the library is linked?

[MushMal]

otool -L will dump the dependent library linkage.

I am not sure why you are having such an issue. Just to double check a couple of things.. could you confirm

• You actually have the library in your build directory under file name libgstkvssink.so
• You have run the following command from the ROOT directory of your repository:

  export GST_PLUGIN_PATH=`pwd`/build
  export LD_LIBRARY_PATH=`pwd`/open-source/local/lib

Also, could you run gst-inspect-1.0 kvssink and include the output?

The version of the GStreamer that's used in the one in brew. Here is the line that installs the prerequisites from the Readme

$ brew install pkg-config openssl cmake gstreamer gst-plugins-base gst-plugins-good gst-plugins-bad gst-plugins-ugly log4cplus gst-libav

[hwanders97]

I got things working after following the advice in this issue: https://github.com/awslabs/amazon-kinesis-video-streams-producer-sdk-cpp/issues/550

Since I am using MacOS Catalina, I needed to turn off System Integrity Protection (SIP). I restarted my computer and followed the steps here: https://help.mulesoft.com/s/article/Variables-LD-LIBRARY-PATH-DYLD-LIBRARY-PATH-are-ignored-on-MAC-OS-if-System-Integrity-Protect-SIP-is-enable

I reinstalled all dependencies and rebuilt the sdk.

git-inspect-1.0 kvssink works along with the macos examples for streaming your Mac webcam to a KVS stream.

Thank you for your help!

[himadrii27]

on running the command cmake .. -DBUILD_GSTREAMER_PLUGIN=ON its giving me errors like 'this source directory doesnt appear to contain CMakeLists.txt ' can you help me with this?

[niyatim23]

I think you're not running cmake from the build folder. Please follow the steps on the readme or the CI: https://github.com/awslabs/amazon-kinesis-video-streams-producer-sdk-cpp/blob/49fa6cbb905958726fe54d98b837c3edf895025d/.github/workflows/ci.yml#L243-L278

[himadrii27]

Now i am getting this error. Do you have any idea how to fix this? CMake Error at dependency/libkvscproducer/kvscproducer-src/CMake/Utilities.cmake:93 (message): CMake step for libopenssl failed: 2 Call Stack (most recent call first): dependency/libkvscproducer/kvscproducer-src/CMakeLists.txt:74 (build_dependency)