Body: <p>I had a video file named file.mp4. I have tried many codecs/players to open it with no luck.</p>
  
  <p>Finally, I used a hex-editor to open the file, and here is what i have found.</p>
  
  <p>Any suggestions on how I can work with this file?</p>
  
  <p><a href="https://i.sstatic.net/suRBV.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/suRBV.png" alt="enter image description here"></a></p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-04-12T03:18:31.210Z
Comments.Text: The file type (ftyp) in your header is "isom". Try https://superuser.com/questions/311595/change-mp4-ftyp-from-isom-to-mp42
Comments.UserDisplayName: Peter Barton
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-04-12T07:57:35.213Z
Comments.Text: Thank you Peter. Please post an answer, so I can flag it as the correct answer.
Comments.UserDisplayName: m.nasim
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-04-12T10:31:16.087Z
Comments.Text: It's fine - if I try to post that as an answer, the site comes back with "trivial answer converted to comment". So there you go! Glad that it worked, it was really just a quick look through - I thought there might still be more to it than what I posted.
Comments.UserDisplayName: Peter Barton
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-04-12T10:33:41.557Z
Comments.Text: Trivial, but very helpful.
Comments.UserDisplayName: m.nasim
Tags: <file-formats>
Title: Unknown Video Format
UserDisplayName: m.nasim
ThreadText: # Unknown Video Format
  
  (Asked by: username_0 on 2020-04-11)
  
  I had a video file named file.mp4. I have tried many codecs/players to open it with no luck.
  
  Finally, I used a hex-editor to open the file, and here is what i have found.
  
  Any suggestions on how I can work with this file?
  
  [![enter image description here](https://i.sstatic.net/suRBV.png)](https://i.sstatic.net/suRBV.png)
  
  **Tags:** file-formats
  
  > **Comments:**
  > **username_1**: The file type (ftyp) in your header is "isom". Try https://superuser.com/questions/311595/change-mp4-ftyp-from-isom-to-mp42  
  > **username_0**: Thank you username_1. Please post an answer, so I can flag it as the correct answer.  
  > **username_1**: It's fine - if I try to post that as an answer, the site comes back with "trivial answer converted to comment". So there you go! Glad that it worked, it was really just a quick look through - I thought there might still be more to it than what I posted.  
  > **username_0**: Trivial, but very helpful.  
  
  ---
  
  ## 0 answers
  
  