In another frustrating scenario, we also found a story where the dash cam files seemed to be corrupted after an incident. Particularly, the actual clip of the accident is only a fraction of the file size, rendering it unplayable.
Dashcam file corruption can occur as a result of power outages, aside from using a faulty SD card and improper ejection from the dash cam. Errors in your video data's file system can hinder proper operations. Fortunately, the user was able to figure out how to “un-corrupt” their files. In this case, he discovered that playing the video back on the dash cam itself repairs the file, giving the camera another chance to fix the footage, now in a more stable situation.
Sometimes, the culprit behind lost dash cam footage is a faulty or low-quality memory card. If you want better performance, dash cams require high-endurance SD cards designed to handle constant read and write cycles. Using subpar cards may result in data corruption and loss. SD cards will eventually give out over time, so regular formats, and replacements when needed can help ensure reliability. Moreover, make sure to look for the footage in all possible folders, including over the computer, as a last resort. Any corruption in the file has the potential to make it end up somewhere other than it should be.