ffmpeg won't recognize x265 options [closed] - encoding

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I am trying to use ffmpeg's built-in x265 library to process .VOB files through h.265codec.
What I understood from the ffmpeg documentation was that:
-c:v libx265 tells ffmpeg to use the h.265 codec for video streams
-x265-params passes options to x265 encoder instead of ffmpeg
But whenever try to run the command, ffmpeg doesn't seem to recognize/pass the options to x265.
It gives the error
Unrecognized option '-y4m'.
Error splitting the argument list: Option not found
Why is this?
Here's the command (edited spacing):
C:\ffmpeg (20170123-e371f03-win64-static)\bin>
ffmpeg -i concat:'input1.VOB'\'input.VOB'
-map 0:v -map 0:a -r 24000/1001 -f yuv4mpegpipe
-c:v libx265 -x265-params
--y4m --fps 24000/1001 -p veryslow --open-gop --bframes 16
--b-p yramid --bitrate 2500 --rect --amp --aq-mode 3 --no-sao --qcomp 0.75
--no-strong -intra-smoothing --psy-rd 1.6 --psy-rdoq 5.0 --rdoq-level 1
--tu-inter-depth 4 --tu-intra-depth 4 --ctu 32 --max-tu-size 16 --pass 1
--slow-firstpass --stats v. stats --sar 1 --range full 'E:\output.hevc'
ffmpeg version N-83195-ge371f03 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 5.4.0 (GCC)
configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --e
nable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --
enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv
--enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-li
bfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug -
-enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enabl
e-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-li
bsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolam
e --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable
-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --ena
ble-zlib
libavutil 55. 44.100 / 55. 44.100
libavcodec 57. 75.100 / 57. 75.100
libavformat 57. 63.100 / 57. 63.100
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 69.100 / 6. 69.100
libswscale 4. 3.101 / 4. 3.101
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100
Unrecognized option '-y4m'.
Error splitting the argument list: Option not found

Answer 1

That's not the correct syntax. Use
-x265-params "y4m=1:fps=24000/1001:p=veryslow:...."

Answer 2

"--y4m" is not a param of x265. in the first place, it should not be there. it is the container for the output that is going into the yuv4mpegpipe. In your syntax, the error there is your codec. x265 don't any idea what yuv4mpegpipe is...
ffmpeg -i concat:'input1.VOB'\'input.VOB'
-map 0:v -map 0:a -r 24000/1001 -f yuv4mpegpipe
-c:v libx265(remove this)-x265-params(remove this)and change it to this "yuv4" -o "input1.VOB.output.y4m"
write this b4 x265-params after erasing --y4m
ffmpeg.exe -i "input1.VOB.output.y4m"<<-this is the output file that went into the yuv4mpegpipe that you want converted to HEVC)(y4m is like mp4 mkv avi mov) --c:v libx265 --x265-params -->>> --y4m --fps 24000/1001 -p veryslow --open-gop --bframes 16
--b-pyramid --bitrate 2500 --rect --amp --aq-mode 3 --no-sao --qcomp 0.75
--no-strong-intra-smoothing --psy-rd 1.6 --psy-rdoq 5.0 --rdoq-level 1
--tu-inter-depth 4 --tu-intra-depth 4 --ctu 32 --max-tu-size 16 --pass 1
--slow-firstpass --stats v. stats --sar 1 --range full 'E:\output.hevc'
if I were to write this, it goes like:
ffmpeg.exe -i concat:'input1.VOB'\'input.VOB' --map 0,1 --c:v yuv4 --s 3840x2160 --r 24000/1001 --f yuv4mpegpipe --pix-fmt yuv444p16le -o "output-yuv444p16le.y4m"
ffmpeg.exe -i "yuv444p16le.y4m" --fps 24000/1001 --p veryslow --c:v libx265 --x265-params --open-gop --bframes 16 --b-pyramid --bitrate 2500 --rect --amp --aq-mode 3 --no-sao --qcomp 0.75 --no-strong-intra-smoothing --psy-rd 1.6 --psy-rdoq 5.0 --rdoq-level 1 --tu-inter-depth 4 --tu-intra-depth 4 --ctu 32 --max-tu-size 16 --pass 1 --slow-firstpass --stats v. stats --sar 1 --range full -o E:\output_yuv444p16le.hevc'