Hi,

I only have a generic suggestion to offer; as always, try updating to the 
current code, or a nightly build.
> Log:
> 
> ffmpeg started on 2020-09-10 at 14:21:31
> Report written to "ffmpeg-20200910-142131.log"
> Log level: 48
> Command line:
> "C:\\Temp\\ffmpeg\\bin\\ffmpeg.exe" -report -i "D:\\Artus\\tif\\0%05d.tif" 
> -c:v prores_ks -profile:v 4444 -vf "scale=2048x1550" -pix_fmt yuv444p10le 
> neu.mov
> ffmpeg version git-2020-06-15-9d80f3e Copyright (c) 2000-2020 the FFmpeg 
> developers
>  built with gcc 9.3.1 (GCC) 20200523
>  configuration: --enable-gpl --enable-version3 --enable-sdl2 
> --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass 
> --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame 
> --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg 
> --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr 
> --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx 
> --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 
> --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp 
> --enable-libvidstab --enable-libvmaf --enable-libvorbis 
> --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid 
> --enable-libaom --disable-w32threads --enable-libmfx --enable-ffnvcodec 
> --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc 
> --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt 
> --enable-amf
I was curious about a few things though, why might someone add 
"--disable-w32threads"? Can you use posix threads instead?

Also, is 2048x1550 not a typo? (1550 doesn't factor very well, 2×25×31)
I can't articulate a clear rationale for this (and so it might not be optimal) 
but I would personally convert formats then change the size, putting the format 
filter before scale instead of pix_fmt. Or more likely I wouldn't even think of 
that and expect ffmpeg to figure that part out for me.
> [AVIOContext @ 00000219ad3f0c40] Statistics: 146089658 bytes read, 0 seeks
> [tiff @ 00000219ad19ea80] compression: 1
> frame=    0 fps=0.0 q=0.0 size=       0kB time=-577014:32:22.77 bitrate=  
> -0.0kbits/s speed=N/A
> cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if 
> it occurs once at the start per stream)
Again, not sure what it means if anything at all, but the time looks like it 
rolled over.

Regards,
Ted Park

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