Answers.Body: <p>See here <a href="https://www.webmproject.org/docs/container/" rel="nofollow noreferrer">https://www.webmproject.org/docs/container/</a> under section Track. There you find PixelCropBottom, PixelCropTop, PixelCropLeft and PixelCropRight - all of which are supported. These parameters should do what you want. They also exist for Matroska.</p>
  <p>Look for a tool that can manipulate those parameters.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-09-11T08:21:27.950Z
Answers.Text: `-vf` will still reencode the video stream, will it not?
Answers.UserDisplayName: v010dya
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-09-11T08:32:13.067Z
Answers.Text: Yes. I'll edit my answer and remove it. I've no other idea what tool to use at the moment.
Answers.UserDisplayName: Matt
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-09-11T08:33:53.893Z
Answers.Text: Thanks. I have checked it, and MKVtools can do that, and i guess i've been doing that.... however, the players simply do not respect that those parameters.
Answers.UserDisplayName: v010dya
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-09-11T08:39:54.317Z
Answers.Text: If you use a browser, like Chrome, and open the webm video there, does it work then? Maybe some or many players have not implemented this feature as it is probably not used much.
Answers.UserDisplayName: Matt
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-09-11T08:41:31.797Z
Answers.Text: Yeah, I currently use SeaMonkey, and it works there, but only if i put not only crop values, but also display values.
Answers.UserDisplayName: v010dya
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-09-11T08:13:16.730Z
Answers.LastActivityDate: 2020-09-11T08:27:22.790Z
Answers.LastEditDate: 2020-09-11T08:27:22.790Z
Answers.UserDisplayName: Matt
Body: <p>I know that Matroska does have a way to remove the border by editing its metadata, and i also know that Webm is a cheaper version of Matroska. I have tried using MKVtools to edit Webm and it appears to work, but then when i play the file nothing changes.</p>
  <p>So does Webm support metadata removal of border from the video? If it does what tool can i use to perform this task?</p>
  
Tags: <mkv>
Title: Is it possible to remove a border from a Webm video losslessly?
UserDisplayName: v010dya
ThreadText: # Is it possible to remove a border from a Webm video losslessly?
  
  (Asked by: username_0 on 2020-09-11)
  
  I know that Matroska does have a way to remove the border by editing its metadata, and i also know that Webm is a cheaper version of Matroska. I have tried using MKVtools to edit Webm and it appears to work, but then when i play the file nothing changes.
  
  So does Webm support metadata removal of border from the video? If it does what tool can i use to perform this task?
  
  **Tags:** mkv
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2020-09-11. Score: 1 | Accepted answer
  
  See here <https://www.webmproject.org/docs/container/> under section Track. There you find PixelCropBottom, PixelCropTop, PixelCropLeft and PixelCropRight - all of which are supported. These parameters should do what you want. They also exist for Matroska.
  
  Look for a tool that can manipulate those parameters.
  
  > **Comments:**
  > **username_0**: `-vf` will still reencode the video stream, will it not?  
  > **username_1**: Yes. I'll edit my answer and remove it. I've no other idea what tool to use at the moment.  
  > **username_0**: Thanks. I have checked it, and MKVtools can do that, and i guess i've been doing that.... however, the players simply do not respect that those parameters.  
  > **username_1**: If you use a browser, like Chrome, and open the webm video there, does it work then? Maybe some or many players have not implemented this feature as it is probably not used much.  
  > **username_0**: Yeah, I currently use SeaMonkey, and it works there, but only if i put not only crop values, but also display values.  
  
  ---
  
  