We are encountering a specific challenge in IBM Content Navigator related to the viewing of large audio and video files. When users attempt to open Audio/Video files that are greater than 2GB, we are getting an error message within the viewer. The key issue is that this error message is not a correct interpretation of the underlying problem (likely a size or streaming limitation), which is causing confusion for users.

Seeking guidance on how to implement either of the following solutions:

1) Is there a way to intercept opening of files and prevent the default viewer from opening if the file size exceeds a certain threshold (e.g., 2GB)?

2) If preventing the viewer from opening is not feasible or desirable, is there a supported method to customize the error message displayed inside the viewer itself to accurately reflect the size limitation?

OOTB you can update the viewer map for the desktop so that the mimetypes for videos go to a more suitable viewer

Original Message:
Sent: Wed July 09, 2025 06:04 AM
From: Nithin H R
Subject: IBM Content Navigator Viewer Issue: Incorrect Error for Audio/Video Files > 2GB - Need to Customize or Prevent Opening

We are encountering a specific challenge in IBM Content Navigator related to the viewing of large audio and video files. When users attempt to open Audio/Video files that are greater than 2GB, we are getting an error message within the viewer. The key issue is that this error message is not a correct interpretation of the underlying problem (likely a size or streaming limitation), which is causing confusion for users.

Seeking guidance on how to implement either of the following solutions:

1) Is there a way to intercept opening of files and prevent the default viewer from opening if the file size exceeds a certain threshold (e.g., 2GB)?

2) If preventing the viewer from opening is not feasible or desirable, is there a supported method to customize the error message displayed inside the viewer itself to accurately reflect the size limitation?

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Nithin H R
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Hi, you can alter the mime type if the file is > 2GB and set the viewer map for the ICN desktop as needed. If you are programmatically uploading the video files leave the content element mime as default but change the document mime to slightly different or custom if the file size is over the threshold. If users are adding the large files you could do a pre processor or direct db update post add (yes I said that) to alter the mime.  I know - I know, last resort issue is mime is immutable set on create so you can't use an update API call. If you wanted to be super nice you could copy the object to a new instance via workflow customer component and change the mime as I described. Last option develop a custom plugin maybe cleanest solution but more difficult. 

Original Message:
Sent: Wed July 09, 2025 06:04 AM
From: Nithin H R
Subject: IBM Content Navigator Viewer Issue: Incorrect Error for Audio/Video Files > 2GB - Need to Customize or Prevent Opening

We are encountering a specific challenge in IBM Content Navigator related to the viewing of large audio and video files. When users attempt to open Audio/Video files that are greater than 2GB, we are getting an error message within the viewer. The key issue is that this error message is not a correct interpretation of the underlying problem (likely a size or streaming limitation), which is causing confusion for users.

Seeking guidance on how to implement either of the following solutions:

1) Is there a way to intercept opening of files and prevent the default viewer from opening if the file size exceeds a certain threshold (e.g., 2GB)?

2) If preventing the viewer from opening is not feasible or desirable, is there a supported method to customize the error message displayed inside the viewer itself to accurately reflect the size limitation?

------------------------------
Nithin H R
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