Unable to stream images from a Basler camera about rc_genicam_api

[heikohimu]

The output of gc_stream shows that it successfully received buffers. gc_stream should either store images and show this on standard output, or produce an error message, e.g. if the image format is unknown. The only reason for not seeing either of it is that there is no image data contained in the buffer. I think that you should check if your camera is properly configured.

[smitesh-sutaria]

@heikohimu Thank you for the inputs.

When we change the settings for "ChunkModeActive" to 'False', get the below error :

$ ./gc_stream 22034422 ChunkModeActive=0
Package size: 1500

Exception: Invalid layout of buffer attached to chunk parser! : RuntimeException thrown (file 'ChunkAdapterGEV.cpp', line 97)

Does gc_stream work only when ChunkModeActive is 'True' ? If so, what should be the config value for "ChunkSelector"

[heikohimu]

Is there a reason for disabling chunks if they are available?

gc_stream checks if chunks a available and enables them if possible. This happens in this line https://github.com/roboception/rc_genicam_api/blob/master/tools/gc_stream.cc#L401 The user parameters are applied afterwards, so gc_stream expects chunks, but buffers do not contain any. I should change the code to check if the user explicitly disables chunks.

For the moment, you could just initialize chunkadapter with 0 in the code.

[smitesh-sutaria]

That worked. Thank you for the inputs.

Here is the diff for the reference :

diff --git a/tools/gc_stream.cc b/tools/gc_stream.cc
index e26191f..7a67560 100644
--- a/tools/gc_stream.cc
+++ b/tools/gc_stream.cc
@@ -398,8 +398,9 @@ int main(int argc, char *argv[])
         // get chunk adapter (this switches chunk mode on if possible and
         // returns a null pointer if this is not possible)

-        std::shared_ptr<GenApi::CChunkAdapter> chunkadapter=rcg::getChunkAdapter(nodemap, dev->getTLType());
+        //std::shared_ptr<GenApi::CChunkAdapter> chunkadapter=rcg::getChunkAdapter(nodemap, dev->getTLType());

+        std::shared_ptr<GenApi::CChunkAdapter> chunkadapter=0;
         // set values as given on the command line

         int n=1;

[heikohimu]

The problem with Basler cameras is fixed in rc_genicam_api release 2.5.0.