Recording video with Nvidia DSR

Installed GTX 1060 driver:

Selected DSR – Factors 4x:

Changed the resolution:

The resolution also changed in System Settings:

QML code for setting the main window size programmatically:

function resizeMainWindow(w, h)
{
    r = Screen.devicePixelRatio

    mainWindow.width = w / r
    mainWindow.height = h / r

    mainWindow.flags |= Qt.FramelessWindowHint
}

Menu
{
    title: mainTr("Windows Size")

    MenuItem {
        text: mainTr("iPhone 6.7 Screen")
        onTriggered: resizeMainWindow(1290, 2796)
    }

    MenuItem {
        text: mainTr("iPhone 5.5 Screen")
        onTriggered: resizeMainWindow(1242, 2208)
    }

    MenuItem {
        text: mainTr("iPad Screen")
        onTriggered: resizeMainWindow(2048, 2732)
    }

    MenuItem {
        text: mainTr("Mac OS Screen")
        onTriggered: resizeMainWindow(1280, 800)
    }

    MenuItem {
        text: mainTr("iPhone 6.7 Video")
        onTriggered: resizeMainWindow(886, 1920)
    }

    MenuItem {
        text: mainTr("iPhone 5.5 Video")
        onTriggered: resizeMainWindow(1080, 1920)
    }

    MenuItem {
        text: mainTr("iPad Video")
        onTriggered: resizeMainWindow(1200, 1600)
    }

    MenuItem {
        text: mainTr("Mac OS Video")
        onTriggered: resizeMainWindow(1920, 1080)
    }

    MenuItem {
        text: mainTr("Default")
        onTriggered: {
            mainWindow.width = nativeModel.windowWidth
            mainWindow.height = nativeModel.windowHeight
            mainWindow.flags &= ~Qt.FramelessWindowHint
        }
    }
}

I tried to record iPhone 6.7 video with Win + Alt + R, but it recorded it in 672×1440px resolution.

So I tried OBS. Its default resolution was 1920×1080:

I updated it as follows:

and set the encoder to MP4:

OBS recorded not 886x1920px but 884x1920px for some reason, but I was able to resize the video with VLC player:

Source file properties:

Converted file properties:

Apple App Store requirements (generated by AI):

Tried 24 FPS:

The right way to resize the video on Ubuntu 22.04 (Insert a setsar filter to reset the SAR to 1, so that the display resolution is the same as the stored resolution, see stackoverflow.com):

ffmpeg -i iphone884.mp4 -vf scale=886:1920,setsar=1 -c:a copy iphone884-c2.mp4
ffmpeg -i iphone884-ru.mp4 -vf scale=886:1920,setsar=1 -c:a copy iphone884-ru-c1.mp4
ffmpeg -i iphone884-zh.mp4 -vf scale=886:1920,setsar=1 -c:a copy iphone884-zh-c1.mp4

10 Responses to Recording video with Nvidia DSR

  1. dmitriano says:

    Are there any apps to resize videos in Ubuntu?
    https://askubuntu.com/questions/914066/are-there-any-apps-to-resize-videos-in-ubuntu
    sudo apt-get install mencoder
    mencoder iphone-src.mp4 -vf scale=886:1920 -ovc copy -oac copy -o iphone-c1.mp4

  2. dmitriano says:

    App Preview resolutions
    https://developer.apple.com/help/app-store-connect/reference/app-preview-specifications
    iphone 6.7 886×1920
    iphone 5.5 1080×1920
    ipad 1200×1600
    mac 1920×1080

  3. dmitriano says:

    How to resize a video to make it smaller with FFmpeg
    https://superuser.com/questions/624563/how-to-resize-a-video-to-make-it-smaller-with-ffmpeg
    ffmpeg -i iphone884.mp4 -s 886×1920 -c:a copy iphone884-c1.mp4

  4. dmitriano says:

    Resizing Video on macOS for Apple App Store Page
    https://stackoverflow.com/questions/77259038/resizing-video-on-macos-for-apple-app-store-page
    ffmpeg -f lavfi -i anullsrc=channel_layout=stereo:sample_rate=44100 -i input.mp4 -c:v copy -c:a aac -shortest output.mp4
    ffmpeg -i output.mp4 -vf scale=886:1920 -r 30 outputFinal.mp4

  5. dmitriano says:

    Using ffmpeg to scale app preview videos for the AppStore
    https://stackoverflow.com/questions/53573468/using-ffmpeg-to-scale-app-preview-videos-for-the-appstore
    Insert a setsar filter to reset the SAR to 1, so that the display resolution is the same as the stored resolution.
    ffmpeg -i video_1920_1080.mp4 -vf scale=1920:886,setsar=1 -c:a copy video_1920_886.mp4

  6. dmitriano says:

    How to create an animated GIF from MP4 video via command line?
    https://askubuntu.com/questions/648603/how-to-create-an-animated-gif-from-mp4-video-via-command-line

    ffmpeg \
    -i iphone884.mp4 \
    -r 15 \
    -vf "scale=512:-1,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" \
    iphone884.gif

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