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I need to concatenate images to a video. Images contain black and white pixels, but I need to save quality of them as much as possible with saving space of disk. So, I don't need to use .mov.

And after that I'm going to load the video to a video hosting.

I'm running this command:

ffmpeg.exe -y -framerate 30 -pattern_type sequence -start_number 00000 -i "E:\Work\git_repos\projects\filestovideosconverter\target\resultImages202303261305\Our Wedding.7z.009-i%5d-d2.png" -c:v libx264 -movflags +faststar -crf 18 -pix_fmt gray -preset slow "E:\Work\git_repos\projects\filestovideosconverter\target\resultVideos202303261505\Our Wedding.7z.009-i5-d2.mp4"

It takes too much time.

Could you please help me to improve it?

UPD:

There are ~300k png images in a folder. They have 720p(1280x720) resolution.

My hardware: ryzen 3600, rtx 3080, 32gb ram, sata HDD with images

It takes ~2h 40m to create a video from the images. So, encoding speed is about 31 fps.

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  • What is "too much time"? Whar format and size/resolution are the photos? What are your computer's hardware details? Encoding video isn't really fast unless you have specialized or very modern hardware.
    – music2myear
    Commented Mar 26, 2023 at 15:08
  • And are you having the system extract these photos from inside a 7zip file? Have you tried extracting the archive and allowing ffmpeg to work on uncompressed files?
    – music2myear
    Commented Mar 26, 2023 at 15:09
  • Images: 1280 x 720. Hardware: ryzen 3600, rtx 3080, 32gb ram. PNG images are in a folder, not in a zip. There are ~300k of them. Time: ~2h 40m
    – EoinKanro
    Commented Mar 26, 2023 at 15:49
  • so, it encodes ~31 frames per second
    – EoinKanro
    Commented Mar 26, 2023 at 15:52
  • 300k pictures in under 3 hours? Is there a benchmark you think your computer should be meeting? Are you seeking general advice on how to make this more efficient, or do you know things should be faster, and if so, why?
    – music2myear
    Commented Mar 26, 2023 at 20:44

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