Calculate nb_frames for MKV using duration and fps.

src/ffprobe-wasm-wrapper.cpp

@@ -178,15 +178,14 @@ FramesResponse get_frames(int offset) {
         if (video_stream_index == -1) {
           video_stream_index = i;
           nb_frames = pFormatContext->streams[i]->nb_frames;
+
+          // Calculate the nb_frames for MKV/WebM if nb_frames is 0.
+          if (nb_frames == 0) {
+            nb_frames = (pFormatContext->duration / 1000000) * pFormatContext->streams[i]->avg_frame_rate.num;
+          }
           pCodec = pLocalCodec;
           pCodecParameters = pLocalCodecParameters;
         }
-
-        printf("Video Codec: resolution %d x %d\n",
-          pLocalCodecParameters->width, pLocalCodecParameters->height);
-      } else if (pLocalCodecParameters->codec_type == AVMEDIA_TYPE_AUDIO) {
-        printf("Audio Codec: %d channels, sample rate %d\n",
-          pLocalCodecParameters->channels, pLocalCodecParameters->sample_rate);
       }
     }
 

www/package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "ffprobe-wasm",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {

www/package.json

@@ -1,6 +1,6 @@
 {
   "name": "ffprobe-wasm",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "scripts": {
     "serve": "vue-cli-service serve",
     "build": "vue-cli-service build",