DeepSpeech (C# Windows) - Error Incompatible Model

EternalAmbiguity · August 15, 2019, 4:10am

I downloaded the 0.5.1 nuget package for DeepSpeech, then set up a WPF project similar to the .Net example in the source. I also downloaded the 0.5.1 models from the appropriate release. I try to initialize with something like:

ds = new DeepSpeechClient.DeepSpeech();
ds.CreateModel(@“C:\Users???\Desktop\Deep Speech\deepspeech-0.5.1-models\output_graph.pbmm”, N_CEP, N_CONTEXT, @“C:\Users???\Desktop\Deep Speech\deepspeech-0.5.1-models\alphabet.txt”, BEAM_WIDTH);

When I hit that piece of the code I get a System.ArgumentException ‘Error incompatible model’. I’m not sure what this error means.

The model files are in the appropriate folder -

Any tips?

kdavis · August 15, 2019, 9:49am

@carlfm01 As you’re the windows expert, do you have any ideas?

lissyx · August 15, 2019, 10:14am

Can you share explicit stderr?

That error means you are loading a different model version than what is supported by the binary …

lissyx · August 15, 2019, 10:15am

github.com

mozilla/DeepSpeech/blob/v0.5.1/native_client/deepspeech.cc#L714


  return DS_ERR_FAIL_CREATE_SESS;
}


int graph_version = model->graph_def.version();
if (graph_version < DS_GRAPH_VERSION) {
  std::cerr << "Specified model file version (" << graph_version << ") is "
            << "incompatible with minimum version supported by this client ("
            << DS_GRAPH_VERSION << "). See "
            << "https://github.com/mozilla/DeepSpeech/#model-compatibility "
            << "for more information" << std::endl;
  return DS_ERR_MODEL_INCOMPATIBLE;
}


for (int i = 0; i < model->graph_def.node_size(); ++i) {
  NodeDef node = model->graph_def.node(i);
  if (node.name() == "input_node") {
    const auto& shape = node.attr().at("shape").shape();
    model->n_steps = shape.dim(1).size();
    model->n_context = (shape.dim(2).size()-1)/2;
    model->n_features = shape.dim(3).size();
    model->mfcc_feats_per_timestep = shape.dim(2).size() * shape.dim(3).size();

EternalAmbiguity · August 15, 2019, 1:05pm

Okay, I think I figured it out. I previously tried to use the latest 0.6.0 alpha 4 package but ran into trouble. I went back to the 0.5.1 nuget package but ran into the incompatible model issue.

I just cleaned and rebuilt my visual studio solution and it works. Thanks for all the help.