A recording in the timeline and a video file on a computer can fail in different ways. First, determine where playback stops: on the recorder, in the app, or only after a file has been exported. This prevents unnecessary changes to the recording settings.
Choose one camera number and a clear time period. Check that fragment locally and through the regular viewing app. Note where it works and where it does not. If the recorder cannot play the fragment itself, that is a different investigation than a computer that does not recognize an export format.
Work with a copy when you are exploring playback options. Do not rename the file extension as a guess to create a different format: the content will not change. Check whether the export is complete and whether any associated files have been included.
The manufacturer may offer its own playback software for certain exports. Hikvision, for example, refers to VSPlayer for exported clips. Check the support for your recorder and file, rather than assuming that every standard video player can read the same thing.
If the recorder allows it, create a short test segment of a recent and clearly replayable moment. Open it on the desired computer. A successful test helps to pinpoint the problem, but does not prove that an older damaged file has been recovered.
Provide the model number, used client, time period, and the exact error message. Indicate whether the recordings on the recorder itself are playing and whether important data should be retained. Do not format or reset storage just to try to resolve a playback problem.
No. Changing the extension does not convert the video file into another format.
Not necessary. First, check whether the same fragment can still be viewed on the recorder.
