4K60 UHD Motion Test Video: Horizontally Moving Bar: 16 Pixels per Frame скачать в хорошем качестве

4K60 UHD Motion Test Video: Horizontally Moving Bar: 16 Pixels per Frame

This is a simple computer generated test video that shows a white bar that moves exactly 16 pixels per frame at 60 fps. I found this to be a good test to detect choppy motion playback on some graphics driver versions or web browsers. 30 fps version here:    • 4K30 UHD Motion Test Video: Horizontally M...   Download source video here: https:/ /drive.google.com/file/d/1yTSHH6mY1D30Z55Q87v5vc6KR7q4OPgu/view?usp=sharing C# Source Code: const int WIDTH = 3840; const int HEIGHT = 2160; const int FRAME_RATE = 60; const int BAR_THICKNESS = 128; const int OFFSET_PER_FRAME = 16; // 8 repetitions const int FRAME_COUNT = 8 * (WIDTH / OFFSET_PER_FRAME); const byte BLACK = byte.MinValue; const byte WHITE = byte.MaxValue; byte[] background = new byte[WIDTH * HEIGHT]; byte[] currentFrame = new byte[WIDTH * HEIGHT]; Array.Fill(background, BLACK); string fileName = $"test_video_{WIDTH}x{HEIGHT}@{FRAME_RATE}Hz_PxPerFrame={OFFSET_PER_FRAME}.gray"; using FileStream file = new FileStream(fileName, FileMode.Create); Console.WriteLine($"Writing video file {fileName}..."); for (int i = 0; i < FRAME_COUNT; ++i) { Array.Copy(background, currentFrame, currentFrame.Length); for (int y = 0; y < HEIGHT; ++y) { int hOffset = (i * OFFSET_PER_FRAME) % WIDTH; for (int barWidth = 0; barWidth < BAR_THICKNESS; ++barWidth) { int x = (hOffset + barWidth) % WIDTH; int pixelIndex = x + (y * WIDTH); currentFrame[pixelIndex] = WHITE; } } file.Write(currentFrame); Console.WriteLine($"Frame {i + 1} / {FRAME_COUNT}"); } Console.WriteLine($"Done

Use the following FFmpeg command to encode the video file:"); Console.WriteLine($"ffmpeg -y -r {FRAME_RATE} -f rawvideo -pix_fmt gray -s {WIDTH}x{HEIGHT} -color_primaries bt709 -color_trc bt709 -colorspace bt709 -color_range tv -i {fileName} -codec:v vp9 -pix_fmt yuv420p -b:v 0 -crf 1 {fileName}.webm");