Maximum compression in the codec x264

[Megafox]

If I chose everything correctly, then it should be compress with losses that can not be seen even on a black background with noise? And why am I getting an error?
[Attachment 44626 - Click to enlarge]
[Attachment 44627 - Click to enlarge]

[poisondeathray]

If I chose everything correctly, then it should be compress with losses that can not be seen even on a black background with noise?

It means it will compress everything losslessly. There will be no loss if you use the same bit depth and colorspace. If your black background had noise, it will preserve the black background and the noise . It just means the uncompressed input = decoded output

And why am I getting an error?

High 10 profile does not support lossless encoding
High 444 profile is required or just leave it "auto" if you don't know what you're doing

[raffriff42]

Try profile=auto instead of high10.

After you get an error, click View menu, Log, then right-click, Copy to clipboard.
Paste it into your text editor. This is what I get:

[*] Beginning dub operation.

[i] Dub: Input (decompression) format is: YUV420.

[E] x264 [error]: high10 profile doesn't support lossless

[E] x264 [error]: x264_param_apply_profile failed

[E] Error: Cannot start video compression:
    An invalid parameter was specified.
    (error code -6)
[*] Ending operation.

(This is better for posting than a screen shot, too)

[jagabo]

And be prepared for a very large file.