Vid_20221215_105814_430.mp4.mkv (Proven ⚡)

MKV files can store rich metadata that MP4s cannot, such as "Writing Application" (e.g., mkvmerge v70.0.0 ) or "Writing Library" (e.g., libebml ). This reveals which software handled the file after it left the phone.

Use the command ffprobe -show_packets VID_20221215_105814_430.mp4.mkv to see if there are any dropped frames or timestamp gaps, which indicate the "health" of the video stream. VID_20221215_105814_430.mp4.mkv

Tools like MKVToolNix often wrap MP4s into MKV to edit without re-encoding. MKV files can store rich metadata that MP4s

If you have access to the file, I recommend running these tools to see the "deep features" for yourself: Tools like MKVToolNix often wrap MP4s into MKV

To truly analyze this file, you would look for the following internal "deep" characteristics:

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Likely a millisecond or sequence identifier used by the camera software to prevent naming collisions.