avfilter/sr: process and output message when load_model is NULL

fix ticket: 7455

Reviewed-by: Pedro Arthur <bygrandao@gmail.com>
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/libavfilter/vf_sr.c b/libavfilter/vf_sr.c
index 077ccc799c..6423d2ea11 100644
--- a/libavfilter/vf_sr.c
+++ b/libavfilter/vf_sr.c
@@ -75,7 +75,12 @@ static av_cold int init(AVFilterContext *context)
         return AVERROR(EIO);
     }
     else{
-        sr_context->model = (sr_context->dnn_module->load_model)(sr_context->model_filename);
+        if (!sr_context->dnn_module->load_model) {
+            av_log(context, AV_LOG_ERROR, "load_model for network was not specified\n");
+            return AVERROR(EIO);
+        } else {
+            sr_context->model = (sr_context->dnn_module->load_model)(sr_context->model_filename);
+        }
     }
     if (!sr_context->model){
         av_log(context, AV_LOG_ERROR, "could not load DNN model\n");