The VideoLAN Forums

Is it possible to force the aspect ratio for transcoding a video?
If so, what settings are required?

The height should be maintained. The width should be doubled.

The solution posted here is not suitable, it makes the video wider, but also higher and is then trimmed in the height.

Can no one say something about?

Check this thread: https://forum.videolan.org/viewtopic.ph ... 31#p380583
Try some different combinations of values.
If you will find out, that it does not work, file a bug report.

Hallo mederi,

probably the problem I have described no good and I shall therefore describe it in detail again.

A 3D video in side-by-side format to be converted to a 2D video.

Here is an example:



For this purpose, the right half of the image to be cut off.
This was achieved under the version 2.0.8 with the following command line string:
After the video from the example looks like this:



In a second step the video to be stretched to the original width.

For playback possible. They can be either

- in Preferences - All - Video the option Monitor pixel aspect ratio set on 0.5, or
- in Preferences - Simple - Video set for the option Force Aspect Ratio the originally aspect ratio (in this example 16:9).

So the video is played back:



How can the video be stored in this stretched form?

For the Croppadd filter I find no setting for stretching to double pixel width or forcing a fixed aspect ratio.

I can adjust the aspect ratio on the canvas video filter. But the adaptation to the given aspect ratio, while retaining the proportionality. When it is stretched in the width, is extended in the height.

How can I solve this problem?

Thanks for any help,
kodela

Can really no one say whether the transcoding with stretching is possible?

I tried to transcode a video sample with some resizing options, but could not get any good results.

Hello mederi,

thank you for your attempts.

It really seems to be such that the VLC can play a video stretched, but he can not save it stretched.

That is very unfortunate.

Hello mederi,

I have the solution, not the VLC, but about Handbrake.

Here's my approach with the example video (640x720 resolution):

Set in section Picture for Anamorphic Custom.
Set for DisplayWidth 1280.
Set for PAR Width 2.
Set for PAR Height 1.

The remaining settings can be left in place.

After converting the video has a resolution of 640x720 unchanged, but is displayed with 1280x720.

kodela