Most forensic video experts recommend MP4 (using H.264 or H.265 codecs) for a balance of quality and small file size.
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Investigators warn that if you receive an .mp4 file, it may not be the "original" proprietary format from the camera. Conversion can sometimes drop frames or distort the image, so it is often better to seek the original raw file for legal evidence. Most forensic video experts recommend MP4 (using H
Forensic video: 10 things every investigator should know - Axon.com cctv mp4