I would like to convert 16 bits grayscale images in an HEVC/mkv video with the x265 encoder without loss, using ffmpeg. I use the monochrome12 profile. My first step is to convert images into yuv format:
ffmpeg -f image2 -i "C:\DATA FOLDER\images%d.png" video.yuv
And I try to convert it as a .mkv file, losslessly:
ffmpeg video.yuv video.mkv -c:v libx265 -x265-params "profile=monochrome12:crf=0:lossless=1:preset=veryslow:qp=0"
But I get
Unrecognized option '-lossless'
Error splitting the argument list : Option not found
When I don't write lossless=1 everything's right, but I don't manage to have a lossless video by this way.
thank you for your help.
It works for me if I make a few changes:
ffmpeg -i video.avi -c:v libx265 \
-x265-params "profile=monochrome12:crf=0:lossless=1:preset=veryslow:qp=0" \
video.mkv
This is like the command you've provided, except I'm using a different input format, and prepend -i
to mark it as an input file.
I also put the output filename at the end, after the output options, otherwise they are not applied, and I get this warning among the output:
Trailing options were found on the commandline.
I don't think the command you gave would cause the error you get though.
libx265 will not give an error on params it doesn't recognise, but show a warning like:
[libx265 @ 0x563e4520e740] Unknown option: lessloss.
I can reproduce your exact error by trying to add --lossless
as a parameter to ffmpeg:
ffmpeg --lossless -i video.avi video.mkv
Unrecognized option '-lossless'.
Error splitting the argument list: Option not found