• FFmpeg – examples and convenience lines

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    # extract one frame at the end of a video
    ffmpeg -sseof -0.1 -i intro_1.mp4 -frames:v 1 -q:v 1 intro_end.jpg

    -sseof -0.1: This option tells FFmpeg to seek to 0.1 seconds before the end of the file. This approach is often more reliable for extracting the last frame, especially if the video’s duration isn’t an exact multiple of the frame interval.
    Super User
    -frames:v 1: Extracts a single frame.
    -q:v 1: Sets the quality of the output image; 1 is the highest quality.

    # extract one frame at the beginning of a video
    ffmpeg -i speaking_4.mp4 -frames:v 1 speaking_beginning.jpg

    # check video length
    ffmpeg -i C:\myvideo.mp4 -f null –

    # Convert mov/mp4 to animated gifEdit
    ffmpeg -i input.mp4 -pix_fmt rgb24 output.gif
    Other useful ffmpeg commandsEdit

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  • What is OLED and what can it do for your TV

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    https://www.cnet.com/news/what-is-oled-and-what-can-it-do-for-your-tv/

    OLED stands for Organic Light Emitting Diode. Each pixel in an OLED display is made of a material that glows when you jab it with electricity. Kind of like the heating elements in a toaster, but with less heat and better resolution. This effect is called electroluminescence, which is one of those delightful words that is big, but actually makes sense: “electro” for electricity, “lumin” for light and “escence” for, well, basically “essence.”

    OLED TV marketing often claims “infinite” contrast ratios, and while that might sound like typical hyperbole, it’s one of the extremely rare instances where such claims are actually true. Since OLED can produce a perfect black, emitting no light whatsoever, its contrast ratio (expressed as the brightest white divided by the darkest black) is technically infinite.

    OLED is the only technology capable of absolute blacks and extremely bright whites on a per-pixel basis. LCD definitely can’t do that, and even the vaunted, beloved, dearly departed plasma couldn’t do absolute blacks.