XPost: alt.comp.os.windows-11   
   From: nospam@needed.invalid   
      
   On Thu, 2/27/2025 10:31 AM, Frank Slootweg wrote:   
   > Paul  wrote:   
   >> 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   
   >   
   >   Thanks. So let's hope that File Explorer's Properties "Type of file:"   
   > is smarter than I thought it is, and is looking at the *content* of the   
   > file, not at the *extension*.   
   >   
   >   Could you do a (File Explorer) 'Properties' on your 'Nine.mp4' file   
   > and report what it says under "Type of file:"? That would tell us one   
   > way or the other whether (FE) 'Properties' is smart or dumb.   
   >   
   > [...]   
   >   
      
   I tried it. I named my sample file from the Internet   
      
      Nine.mp4   
      
   and File Explorer says   
      
      File Type:  MP4   
      
   That is because Windows "trusts" the file extension.   
      
   If I remove the extension entirely, File Explorer says   
      
      File Type:  file   
      
   so it hasn't a clue what it is then. The object-oriented   
   launching of an application, based on the file type, in Windows,   
   is centered around the declared extension.   
      
   *******   
      
   However, when I change the extension back to the original (download) value   
      
      Nine.ts   
      
   now, suddenly, doing a Properties in File Explorer, gives this   
      
      Video   
      
      Length:            00:01:02         (Sixty two seconds)   
      Frame width:       720   
      Frame height:      576              (Aussie PAL TV)   
      Data rate:         5291 kbps        (Must be on a multiplex, multiple   
   streams on one 6MHz channel)   
      Total bitrate:     5387 kbps   
      Frame rate:        25.00 frames/second   
      
      Audio   
      
      Bit rate:          96 kbps   
      Channels:          2 (stereo)   
      Audio Sample Rate: 48.000 kHz   
      
   And that means, Windows applied a TS specific filter, to collect   
   that metadata about the video. Such metadata would also show   
   up if you used Indexed Search and asked for "width=720"   
   and then that item would show up in the list.   
      
   When the file extension was MP4, it applied the MP4 filter   
   which failed to find anything.   
      
   And Windows doesn't have filters for everything, and even   
   applying the correct extension might elicit no useful response   
   at all. It's a "best effort" not a guarantee, and that's   
   true of most multimedia topics anyway.   
      
      Paul   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)