Add support for the out-of-tree Jetson FFmpeg NVMPI decoders

https://github.com/jocover/jetson-ffmpeg

app/streaming/video/ffmpeg.cpp

@@ -670,6 +670,23 @@ bool FFmpegVideoDecoder::initialize(PDECODER_PARAMETERS params)
 #endif
 
 #ifdef Q_OS_LINUX
+        {
+            AVCodec* nvmpiDecoder;
+
+            if (params->videoFormat & VIDEO_FORMAT_MASK_H264) {
+                nvmpiDecoder = avcodec_find_decoder_by_name("h264_nvmpi");
+            }
+            else {
+                nvmpiDecoder = avcodec_find_decoder_by_name("hevc_nvmpi");
+            }
+
+            if (nvmpiDecoder != nullptr &&
+                    tryInitializeRenderer(nvmpiDecoder, params, nullptr,
+                                          []() -> IFFmpegRenderer* { return new SdlRenderer(); })) {
+                return true;
+            }
+        }
+
         {
             AVCodec* v4l2Decoder;