_m_smp4 💯

Could you tell me or what software you were using when it appeared? This will help me give you a much more specific answer.

: Use a tool like MediaInfo or VLC Media Player to "Open" the file; these can often read the internal header to tell you the true codec, even if the file extension is non-standard. _m_smp4

: If this appeared after using a specific downloader or editing tool, check that software's "Export" or "Save" settings to see if the process was interrupted. Could you tell me or what software you