Why does my video go back to sideways after rotating it in VLC?
Effects and Filters only changes playback in VLC. To keep the rotation, convert the file with the transformation filter enabled, or rotate it with the tool on this page.
Quick answer: in VLC, go to Tools → Effects and Filters, open the Video Effects tab, then Geometry. Tick Transform, choose Rotate by 90 degrees (or 180 or 270), and close the window. The video turns immediately.
There's a catch: that only changes how VLC plays the video. The file itself stays sideways, so it will be wrong again in any other player or when you send it to someone. Saving a rotated video in VLC is possible, but it takes a detour through Convert/Save, explained below.
These steps are for VLC 3 on Windows and Linux. On a Mac, look for the same Geometry controls under Window → Video Effects. Labels can differ slightly between versions.
Play the video in VLC.
Go to Tools → Effects and Filters, or press Ctrl+E.
Select the Video Effects tab, then the Geometry tab.
Tick Transform and choose Rotate by 90 degrees, Rotate by 180 degrees or Rotate by 270 degrees. Flip horizontally and Flip vertically are in the same list.
Close the dialog. The video now plays rotated, in VLC only.
To make the rotation permanent, VLC has to re-encode the video with its transformation filter switched on. It's fiddly, but it works:
If the result still comes out sideways, check that the filter is ticked in both places and that the profile isn't keeping the original video track.
If you just need the file the right way up, the tool at the top of this page takes three steps: drop the video in, press Left or Right until it's upright, then select Export video. For 90°, 180° and 270° turns with the default Expand canvas, it changes only the file's rotation flag, so there's no re-encode and no quality loss. VLC, like other modern players, reads that flag and shows the video upright.
You can flip a video here too, with a high-quality re-encode. Nothing is uploaded and there's no watermark. It works in modern browsers on phones too; see the guides for iPhone and Android. On Windows without VLC? See how to rotate a video in Windows.
Effects and Filters only changes playback in VLC. To keep the rotation, convert the file with the transformation filter enabled, or rotate it with the tool on this page.
Go to Tools → Effects and Filters → Video Effects → Geometry, tick Transform, and choose Flip horizontally or Flip vertically. Like rotation, this is playback only unless you convert the file with the filter turned on.
Tick Rotate in the Geometry tab and drag the angle control. That is for playback, and odd angles leave the corners showing. To save a custom angle, use Fine angle in the tool above, with Fill or Blur corners.
Yes. Modern versions of VLC read the rotation flag that phone videos carry and show them upright. If a phone video still looks sideways in VLC, the flag itself is wrong; rotate it here to correct it.
It can, because VLC re-encodes the whole video. Quarter turns in the browser tool avoid that: only the rotation flag changes, so the video and audio are copied untouched.
Yes, for playback: open Window → Video Effects, go to Geometry and tick Transform. Saving a copy goes through File → Convert / Stream, which is laid out differently from Windows, so the browser tool is often simpler.