<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>

CC BY-SA 4.0
2020-09-11T08:21:27.950Z
`-vf` will still reencode the video stream, will it not?
v010dya
CC BY-SA 4.0
2020-09-11T08:32:13.067Z
Yes. I'll edit my answer and remove it. I've no other idea what tool to use at the moment.
Matt
CC BY-SA 4.0
2020-09-11T08:33:53.893Z
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.
v010dya
CC BY-SA 4.0
2020-09-11T08:39:54.317Z
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.
Matt
CC BY-SA 4.0
2020-09-11T08:41:31.797Z
Yeah, I currently use SeaMonkey, and it works there, but only if i put not only crop values, but also display values.
v010dya
CC BY-SA 4.0
2020-09-11T08:13:16.730Z
2020-09-11T08:27:22.790Z
2020-09-11T08:27:22.790Z
Matt
<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>

<mkv>
Is it possible to remove a border from a Webm video losslessly?
v010dya
# 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


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## 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.  

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