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  1. I have a few, very old, videos. I tried converting with VLC, but the results were a drama.
    Went through the steps on https://www.howtogeek.com/14751/rotate-a-video-on-windows/
    However, persons were 'blown up' as VLC did not keep the original 4:3 size
    Also VLC went in some endless loop when converting, asking to overwrite the original. Had to 'kill' VLC.


    I figured out that in MPC-BE with alt-1 one can change the orientation.
    Results look okay. But I have not found a way to make this change 'stick', i.e. when I relaunch the file (.avi) it will still be sideways, it is not saved/converted.

    Maybe it is not possible with MPC-BE?

    I do not want to spend much time on it: it involves just 3-4 files. If it requires installing this and that whatever, I let it rest.

    Thanks.
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  2. The avi container does not allow quick and easy rotation.
    mp4 and mov can. If the codecs in your avi allow a simple remux to mp4 or mov, then you can also rotate the video without recoding it.
    Post a mediainfo report (text mode) of your avi file here and we'll see.
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  3. And MPC-BE is not a video editor. It is a player.
    Extraordinary claims require extraordinary evidence -Carl Sagan
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  4. Thanks for the replies and very sorry for the delay.

    There were some 3-4 videos (.AVI) only and I just now discovered that one of them -was- already rotated and converted to mkv many years ago but was stored in another folder.
    Frankly, I have no idea how I did this. Maybe I used TMPGenc Mastering Works for it.

    I tried the VLC method again just now and it worked out fine this time.
    It beats me why it did not work in the first time(s) ... Output then was resized to width of the player instead of keeping 4:3 size.
    (Followed the same steps, but maybe I forgot to click on 'Save' at some point, I don't know)

    Anyway, it is solved now.
    Thanks again for replying.
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  5. Originally Posted by vhwul62 View Post
    I have a few, very old, videos. I tried converting with VLC, but the results were a drama.
    Went through the steps on https://www.howtogeek.com/14751/rotate-a-video-on-windows/
    However, persons were 'blown up' as VLC did not keep the original 4:3 size
    Also VLC went in some endless loop when converting, asking to overwrite the original. Had to 'kill' VLC.


    I figured out that in MPC-BE with alt-1 one can change the orientation.
    Results look okay. But I have not found a way to make this change 'stick', i.e. when I relaunch the file (.avi) it will still be sideways, it is not saved/converted.

    Maybe it is not possible with MPC-BE?

    I do not want to spend much time on it: it involves just 3-4 files. If it requires installing this and that whatever, I let it rest.

    Thanks.
    When I tried rotating videos that you mentioned in that link with VLC, the videos are rotated fine when playing them with VLC. However, when playing them with Windows Media Player, the videos are NOT rotated. I don't want to be stuck to one video player. I would like to have them at least working with Windows Media Player. Do your rotated videos work with Windows Media Player? If not, then do you plan to use only VLC as your video player?
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  6. You can use LAV Filters in MPC-BE to apply a rotation to your video playback.
    this method will not permanently change the file; it will only affect playback.

    Step-by-Step Setup with LAV Filters
    In MPC-BE Go to File → Options.
    Select Filters
    In the left sidebar, navigate to Playback → Output.
    Configure LAV Filters
    Under the Video Decoder section, ensure LAV Video Decoder is selected.
    Click on LAV Video Decoder to access its settings.
    Set Rotation
    In the LAV Video Decoder settings, look for the Transform tab.
    Find the Rotation option. You can set it to 90 degrees clockwise.
    Click OK to save your settings.

    Playback
    Open your AVI file. The video should now play with the specified rotation.

    Note
    This method only affects playback and does not save the rotation to the file itself.
    If you want the rotation to be permanent, you will still need to re-encode the video
    using a tool like clever FFmpeg-GUI
    Last edited by videoAI; 29th Sep 2025 at 15:22.
    There is nothing wrong with my environment
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