[FFmpeg-cvslog] dnn_backend_openvino.c: add version mismatch reminder

[Guo, Yejun]

ffmpeg | branch: master | Guo, Yejun <yejun.guo at intel.com> | Mon Jan 18 15:27:23 2021 +0800| [0d5fd4999a2291d82fe5cc8a4c8157165536ba04] | committer: Guo, Yejun

dnn_backend_openvino.c: add version mismatch reminder

The OpenVINO model file format changes when OpenVINO goes to a new
release, it does not work if the versions between model file and
runtime are mismatched.

Signed-off-by: Guo, Yejun <yejun.guo at intel.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=0d5fd4999a2291d82fe5cc8a4c8157165536ba04
---

 libavfilter/dnn/dnn_backend_openvino.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/libavfilter/dnn/dnn_backend_openvino.c b/libavfilter/dnn/dnn_backend_openvino.c
index 8a7abb33f0..bb4ef3958f 100644
--- a/libavfilter/dnn/dnn_backend_openvino.c
+++ b/libavfilter/dnn/dnn_backend_openvino.c
@@ -544,8 +544,15 @@ DNNModel *ff_dnn_load_model_ov(const char *model_filename, const char *options,
         goto err;
 
     status = ie_core_read_network(ov_model->core, model_filename, NULL, &ov_model->network);
-    if (status != OK)
+    if (status != OK) {
+        ie_version_t ver;
+        ver = ie_c_api_version();
+        av_log(ctx, AV_LOG_ERROR, "Failed to read the network from model file %s,\n"
+                                  "Please check if the model version matches the runtime OpenVINO %s\n",
+                                   model_filename, ver.api_version);
+        ie_version_free(&ver);
         goto err;
+    }
 
     model->get_input = &get_input_ov;
     model->get_output = &get_output_ov;