This file will not play in standard players it must first be packed into a container such as mp4. It doesn't have anything fancy for output, so unless you see errors you can wait for it to complete.

nvenc_h265_transparency -yuvFrames video.yuv -width -height -fpsn -fpsd -mask image.yuv Now it's time to run the code you built earlier: This mask must be a grayscale image where a bright value represents more opacity, and dark value represents more transparency.įor this test you can use any grayscale image, but it MUST have the same dimensions as the video:įfmpeg -i image.jpg -pix_fmt nv12 image.yuv Create an h.265 video with transparency We'll use our image.jpg for a transparency mask. This file will be uncompressed so a large number of frames will take a lot of space.įfmpeg -i video.mp4 -c:v rawvideo -pix_fmt nv12 video.yuv Convert mask to raw bytes Now convert the video to a raw sequence of YUV 4:2:0 frames, all packed into one monolithic file. Get the frame rate (fps) as a ratio (numerator and denominator):įfprobe -v error -select_streams v:0 -show_entries stream=r_frame_rate -of csv=s=x:p=0 video.mp4 Convert video to raw bytes

There are many ways to determine this, ffprobe is one way:įfprobe -v error -select_streams v:0 -show_entries stream=width,height -of csv=s=x:p=0 video.mp4 Get the video dimensions (width and height). We also need a grayscale image of the same dimensions as the video, say image.jpg. Start with any video, say a file named video.mp4.

Ffmpeg h265 nvenc