Update Case_study.md

Log updates

Doc/Case_study.md

@@ -154,13 +154,35 @@ Info: Uncompressed file hashes (used by reversibility check) present.
 
 Reversibility was checked, no issue detected.
 ```
-
-The RAWcooked assessments themselves are lines of repeated data, counting from 0% to 100%. The FFmpeg encoding data contains sequence and FFV1 metadata, along with choices made by the software for the encoding process and logs of the fps for the encoding of the sequence. All this information is really important when there's an issue with the encoding. The final text review is generated by the RAWcooked assessment of the image sequence and the FFV1 Matroska. In this last section you will see different types of human readable message including:
+
+
+If an encoding has completed then in this last section you might see different types of human readable message including:
 * Warnings about the image sequence files
 * Errors experienced during encoding
-* Information about the RAWcooked encode (RAWcooked version, if checksum hashes are included)
-* Completion success or failure statement
+* Information about the RAWcooked encode (shown above)
+* Completion success or failure statement (shown above)
 
+Error example:
+```
+Reversibility was checked, issues detected, see below.
+
+Error: undecodable files are not same.
+       N_7192293_01of06/Scan01/2150x1582/00014215.dpx
+       N_7192293_01of06/Scan01/2150x1582/00014216.dpx
+       ...
+Error: undecodable files from output are not same as files from source.
+       N_7192293_01of06/Scan01/2150x1582/00014215.dpx
+       N_7192293_01of06/Scan01/2150x1582/00014216.dpx
+       ...
+At least 1 file is not conform to specifications.
+```
+
+Sometimes an encoding will not even start, and a single error message may be found in your log:
+```
+Error: unsupported DPX (non conforming) alternate end of line non padding
+Please contact [email protected] if you want support of such content.
+```
+
 The automation scripts used at the BFI National Archive look for any messages that have 'Error' in them. If any are found the FFV1 Matroska is deleted and the sequence is queued for a repeated encode attempt.  Likewise, if the completion statement suggests a failure then the FFV1 is deleted and the sequence is queued for a repeat encode. A successful completion statement should always read:
 ```Reversibility was checked, no issues detected.```