Avidemux Forum

Quote from: MarcusDeMan on Today at 01:22:23 PMHowever, I mean the main editing window still shows the video in landscape mode even after adding this rotation filter.

If you enable the button to the right of the info (i) button in the main window, you can playback with filter rotation applied.
Unfortunately, this only works during playback, so is not practical for frame by frame editing.

Presumably due to HDR -> SDR conversion, given the source video has color depth > 8 bit. There are various HDR tone mapping algorithms in the Video menu available, none perfect and all unaccelerated (performed on the CPU). Please try playing with settings to reduce saturation.

Quote from: MarcusDeMan on June 02, 2026, 05:52:25 PMDoes this happen because of the video decoder (Lavcodec RGB)?

Not in this case.

Unrelated: please consider switching from unaccelerated fallback "Qt" video display, indicated by the "RGB" label (it looks like you are using a pretty old Avidemux build as current 2.8.2 builds display information about decoder and display in the status bar) to a better option (all other options are better). The best and also the default video display in Avidemux on Windows is "DXVA2" (actually DirectX).

Quote from: MarcusDeMan on June 02, 2026, 05:54:39 PMI wanted to know if there is a way to rotate the preview video?

No. The feature is on the nice-to-have list.

Quote from: MarcusDeMan on June 02, 2026, 05:54:39 PMWhen capturing videos in portrait mode, avidemux shows / rotating them in landscape orientation.

Yes, by design, showing as coded and with square pixels, not applying any transformations either from container metadata or codec (except for crop directives from VUI, of course).

Hi Sark,

Thank you for your reply.

However, I mean the main editing window still shows the video in landscape mode even after adding this rotation filter.

I now use MKVToolnix to convert all my M2TS files to MKV before opening in any editing app. This has solved a number of issues with various apps I use, incluing Avidemux.

I've seen a few odd issues disappear after remuxing the source file first with a tool like ffmpeg and then opening the new file in Avidemux. Sometimes the container metadata is the culprit rather than the video stream itself. Might be worth a quick test if you haven't tried it already.

If you set The Transform/Rotate filter to rotate the video, filter previews will display rotated.

If you click the button to the right of the Info button, below the menu bar (a green dot should appear to confirm on), main window playback will show rotation (though not when paused).

You can disable or delete the Rotate filter before exporting if desired.

Hi all,

I wanted to know if there is a way to rotate the preview video?

When capturing videos in portrait mode, avidemux shows / rotating them in landscape orientation.

Would be helpful that I can rotate the video to make it easier to watch the previews.

Of course, I understand that when exporting the video I will still need to configure the rotation separately.

Hi all,

I've recently upgraded my phone to the Samsung s25 that supports HEVC recording.

When viewing the video with VLC the colors appear to be ok as captured.

But when I import the same video into Avidemux the colors are all very saturated.

Does this happen because of the video decoder (Lavcodec RGB)? If so, how can I change that?

If not, what can I do to make the colors appear the same as captured on my phone or when viewing with VLC?

I found the problem with the "cannot open muxer" error.
I was file name parsing problem with "\", "/" in the path.
Missing output directory can also show this error.