update readme (#595)

[ROCm/rocdecode commit: 94356320b1]

projects/rocdecode/samples/videoDecodeBatch/README.md

@@ -32,4 +32,7 @@ make -j
 ./videodecodebatch -i <directory containing input video files [required]> 
                                    -t <number of threads [optional - default:4]>
                                    -d <Device ID (>= 0) [optional - default:0]>
+                                   -o Directory for output YUV files - optional
+                                   -m output_surface_memory_type - decoded surface memory; optional; default - 3 [0 : OUT_SURFACE_MEM_DEV_INTERNAL/ 1 : OUT_SURFACE_MEM_DEV_COPIED/ 2 : OUT_SURFACE_MEM_HOST_COPIED/ 3 : OUT_SURFACE_MEM_NOT_MAPPED]
+                                   -disp_delay -specify the number of frames to be delayed for display; optional; default: 1
 ```