Updating recording documentation.

1 files changed, 32 insertions, 20 deletions

diff --git a/docs/user_guide/gaze_analysis_pipeline/recording.md b/docs/user_guide/gaze_analysis_pipeline/recording.md
index 26b7e82..826442f 100644
--- a/docs/user_guide/gaze_analysis_pipeline/recording.md
+++ b/docs/user_guide/gaze_analysis_pipeline/recording.md
@@ -1,31 +1,34 @@
 Record gaze analysis
 =================
 
-[ArFrame](../../argaze.md/#argaze.ArFeatures.ArFrame) and [ArLayer](../../argaze.md/#argaze.ArFeatures.ArLayer) analysis can be recorded by registering observers to their **look** method.
+[ArFrame](../../argaze.md/#argaze.ArFeatures.ArFrame) and [ArLayer](../../argaze.md/#argaze.ArFeatures.ArLayer) analyses can be recorded by registering observers for their **look** method.
 
 ## Export gaze analysis to CSV file
 
 [ArFrame](../../argaze.md/#argaze.ArFeatures.ArFrame) and [ArLayer](../../argaze.md/#argaze.ArFeatures.ArLayer) have an **observers** attribute to enable pipeline execution recording.
 
-Here is an extract from the JSON ArFrame configuration file where recording is enabled for the [ArFrame](../../argaze.md/#argaze.ArFeatures.ArFrame) and for one [ArLayer](../../argaze.md/#argaze.ArFeatures.ArLayer) by loaded classes from Python files:
+Here is an extract from the JSON ArFrame configuration file where recording is enabled for the [ArFrame](../../argaze.md/#argaze.ArFeatures.ArFrame) and for one [ArLayer](../../argaze.md/#argaze.ArFeatures.ArLayer) by loading classes from *my_recorders.py* Python file:
 
 ```json
 {
-    "name": "My FullHD screen",
-    "size": [1920, 1080],
-    "observers": {
-        "my_recorders.ScanPathAnalysisRecorder": {
-            "path": "./scan_path_metrics.csv"
+    "argaze.ArFeatures.ArFrame": {
+        "name": "My FullHD screen",
+        "size": [1920, 1080],
+        ...
+        "observers": {
+            "my_recorders.ScanPathAnalysisRecorder": {
+                "path": "scan_path_metrics.csv"
+            }
         },
-    ...
-    "layers": {
-        "MyLayer": {
-            "observers": {
-                "my_recorders.AOIScanPathAnalysisRecorder": {
-                    "path": "./aoi_scan_path_metrics.csv"
+        "layers": {
+            "MyLayer": {
+                ...
+                "observers": {
+                    "my_recorders.AOIScanPathAnalysisRecorder": {
+                        "path": "aoi_scan_path_metrics.csv"
+                    }
                 }
-            },
-            ...
+            }
         }
     }
 }
@@ -34,6 +37,9 @@ Here is an extract from the JSON ArFrame configuration file where recording is e
 !!! note
     [ArFrame](../../argaze.md/#argaze.ArFeatures.ArFrame) and its [ArLayers](../../argaze.md/#argaze.ArFeatures.ArLayer) automatically notify **look** method observers after each call.
 
+!!! note
+    The *scan_path_metrics.csv* and *aoi_scan_path_metrics.csv* are created relatively to the place where the Python script is executed.
+
 Here is *my_recorders.py* file:
 
 ```python
@@ -89,6 +95,9 @@ class AOIScanPathAnalysisRecorder(UtilsFeatures.FileWriter):
             self.write(data)
 ```
 
+!!! note
+    *my_recorders.py* file have to be in the same folder than the JSON ArFrame configuration file.
+
 Assuming that [ArGaze.GazeAnalysis.Basic](../../argaze.md/#argaze.GazeAnalysis.Basic) scan path analysis module is enabled for 'My FullHD screen' ArFrame, a ***scan_path_metrics.csv*** file would be created:
 
 |Timestamp (ms)|Duration (ms)|Steps number|
@@ -117,7 +126,7 @@ Assuming that [ArGaze.GazeAnalysis.NGram](../../argaze.md/#argaze.GazeAnalysis.N
 
 As explained in [pipeline steps visualization chapter](visualization.md), it is possible to get [ArFrame.image](../../argaze.md/#argaze.ArFeatures.ArFrame.image) once timestamped gaze positions have been processed by [ArFrame.look](../../argaze.md/#argaze.ArFeatures.ArFrame.look) method.
 
-Here is the JSON ArFrame configuration file where [ArFrame](../../argaze.md/#argaze.ArFeatures.ArFrame) observers are extended with a new my_recorders.VideoRecorder instance:
+Here is the JSON ArFrame configuration file where [ArFrame](../../argaze.md/#argaze.ArFeatures.ArFrame) observers are extended with a new my_recorders.FrameImageRecorder instance:
 
 ```json
 {
@@ -126,16 +135,19 @@ Here is the JSON ArFrame configuration file where [ArFrame](../../argaze.md/#arg
     "observers": {
         ...
         "my_recorders.FrameImageRecorder": {
-            "path": "./video.mp4",
+            "path": "video.mp4",
             "width": 1920,
             "height": 1080,
             "fps": 15
-        },
+        }
     ...
 }
 ```
 
-Here is *my_recorders.py* file extended with a new VideoRecorder class:
+!!! note
+    The *video.mp4* is created relatively to the place where the Python script is executed.
+
+Here is *my_recorders.py* file extended with a new FrameImageRecorder class:
 
 ```python
 ...
@@ -153,4 +165,4 @@ class FrameImageRecorder(UtilsFeatures.VideoWriter):
         self.write(ar_frame.image())
 ```
 
-Assuming that [ArFrame.image_parameters](../../argaze.md/#argaze.ArFeatures.ArFrame.image_parameters) are provided, ***video.mp4*** file would be created.
\ No newline at end of file
+Assuming that [ArFrame.image_parameters](../../argaze.md/#argaze.ArFeatures.ArFrame.image_parameters) are provided, ***video.mp4*** file would be created.