XPost: alt.comp.os.windows-11   
   From: nospam@needed.invalid   
      
   On Thu, 2/27/2025 8:57 AM, Frank Slootweg wrote:   
   > Paul  wrote:   
   >> On Thu, 2/27/2025 3:00 AM, Daniel70 wrote:   
   >>> On 27/02/2025 2:29 am, Frank Slootweg wrote:   
   > [...]   
   >>>>   Anyway, have you tried to just right-click the file in File Explorer,   
   >>>> select Properties and look at the 'Details' tab? For a normal video   
   >>>> file, File Explorer will mention the Length, Frame width and height,   
   >>>> Data rate, Total bitrate, Frame rate and Audio specs.   
   >>>   
   >>> General Details   
   >>> vid000.mp4 (name changed as suggested by others)   
   >>> Type of file:    TS file (.ts)   
   >>> Open with:    Media Player (Button "Change" which gives option to use   
   Media Player, VLC Media Player, Windows Media Player Legacy, Firefox, Notepad,   
   Word)   
   >>> Location: On a sub-directory of my USB Drive   
   >>> Size:    113MB (118,876,060 bytes)   
   >>> Size on Disk:    113MB (118,882,304 bytes)   
   >>> Created: Last Friday   
   >>> Modified:    Last Friday   
   >>> Accessed:    Yesterday   
   >>>   
   >>>>    If that does not help, the MediaInfo utility mentioned by Paul is   
   >>>> probably your best bet.   
   >>   
   >> If it was Transport Stream, and the "Type of file" field says .ts   
   >> then I would try an extension of .ts and feed it to VLC.   
   >>   
   >> https://recoverit.wondershare.com/video-recovery/what-is-ts-file.html   
   >   
   >   I don't think it's an actual Transport Stream file. AFAIK, the 'Type   
   > of file:' field in Properties of a file just echoes the *extension*, not   
   > the *content*.   
   >   
   >   For example, if I rename an actual MP4 file to .ts, Properties says   
   > "Type of file: TS file (.ts)", i.e. matching the extesion, not the   
   > actual content. The thumbnail in File Explorer changes (from showing the   
   > picture) to an Media Player icon. And when open the file, it plays just   
   > fine in Media Player.   
   >   
   >   So I don't understand why Daniel's vid000.mp4 file would say "Type of   
   > file: TS file (.ts)" in Properties.   
   >   
   >   Of course I *hope* I'm wrong and that a rename to .ts will solve   
   > Daniel's problem.   
   >   
   > [...]   
   >   
      
   Even when the file extension is .mp4, MediaInfo says it is MPEG-ts.   
   You have to stretch the window nice and wide, as the person who wrote the   
   program, wasn't too worried about formatting.   
      
      [Picture]   
      
       https://i.postimg.cc/bwBKGDcy/MPEG-ts-detection.gif   
      
   what's neat about this, is the Linux "file" command calls it "Data",   
   so the structure is irregular enough to not be detected. With no magic bytes,   
   and (usually) a 1024 byte sniffing range into the file, it would have needed   
   to read too much of the file to sync up to it. I'm not seeing 4CC codes in   
   MPEG2, and the "spectrum" when I used the hex editor, I'd never seen that   
   before. But I could tell instantly it wasn't encrypted, because there   
   was a bit of text in there that looked like Guide Data. Scrolling through it,   
   you can see the odd bit of padding added too.   
      
      Paul   
      
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