I renamed it to
myStream.sdp and copied to the content folder, but the file doesn't show in the "stream files" list:
I tried to create a new file, the new stream file is created in the folder where SDP file is located. I even tried to use different folder as streaming file directory and put the sdp file there, but the result was the same. The stream from Elecard encoder is played back normally if I open the SDP file with VLC player.
If you are using an encoder that generates an .sdp file, you have to copy that file to the application's content folder, then use that file name as the stream name to start up. You will not need to create a .stream file. And the Wowza manager cannot really help with the .sdp file, except to start the stream, but the file that is generated by the encoder has to be copied to Wowza.
You have to also start the stream, as I mentioned and
shown in this guide. Look at the access log, find the publish event corresponding to the start of the stream, and below that you will see log messages that should show Wowza connecting to the stream and starting to packetize streams, per your configuration; or WARN and/or ERRROR messages.