[Streamer] Build without deepstream, add CPU decoder (#1178)

build without deepstream

streamer/examples/video_decoder/cpp/README_CN.md

@@ -15,6 +15,7 @@ make -j
 
 3. 运行
 ```
-cp ../streamer_cfg.yml .
+# GPU解码（gpu.yml）或CPU解码（cpu.yml）
+cp ../gpu.yml streamer_cfg.yml
 ./video_decoder
 ```

streamer/examples/video_decoder/cpp/README_EN.md

@@ -15,6 +15,7 @@ make -j
 
 3. Run
 ```
-cp ../streamer_cfg.yml .
+# GPU decoding(gpu.yml) or CPU decoding(cpu.yml)
+cp ../gpu.yml streamer_cfg.yml
 ./video_decoder
 ```

streamer/examples/video_decoder/cpp/cpu.yml

@@ -0,0 +1,17 @@
+app:
+  type: video_decoder
+  enable-perf-measurement: true
+  perf-measurement-interval-sec: 5
+
+uridecodebin:
+  uri: file:///opt/nvidia/deepstream/deepstream/samples/streams/sample_ride_bike.mov
+
+videoconvert:
+
+capsfilter:
+  caps: video/x-raw,format=(string)BGR
+
+appsink:
+  sync: true
+  max-buffers: 60
+  drop: false