ffmpeg -y -probesize 5000000 -f image2 -s 1920x1080 -r 24 -i /mnt/nox2/development/example_exr/frames.%04d.exr -c:v libx264 -profile:v main -g 1 -tune stillimage -crf 9 -bf 0 -vendor ap10 -pix_fmt -pix_fmt yuvj444p -s 1920x1080 -r 24 /mnt/nox2/development/ffmpeg_test_output_exr_h264_yuvj44p.mov
ffmpeg version 2.2.git Copyright (c) 2000-2014 the FFmpeg developers
  built on Mar 20 2014 12:34:26 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  configuration: --prefix=/home/superuser/ffmpeg_build --extra-cflags=-I/home/superuser/ffmpeg_build/include --extra-ldflags=-L/home/superuser/ffmpeg_build/lib --bindir=/home/superuser/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-x11grab
  libavutil      52. 67.100 / 52. 67.100
  libavcodec     55. 52.102 / 55. 52.102
  libavformat    55. 34.101 / 55. 34.101
  libavdevice    55. 11.100 / 55. 11.100
  libavfilter     4.  3.100 /  4.  3.100
  libswscale      2.  5.102 /  2.  5.102
  libswresample   0. 18.100 /  0. 18.100
  libpostproc    52.  3.100 / 52.  3.100
Input #0, image2, from '/mnt/nox2/development/example_exr/frames.%04d.exr':
  Duration: 00:00:04.17, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: exr, rgb48le, 1920x1080 [SAR 1:1 DAR 16:9], 24 fps, 24 tbr, 24 tbn, 24 tbc
[NULL @ 0x3af0440] Unable to find a suitable output format for 'yuvj444p'
yuvj444p: Invalid argument






however this is showing up in
ffmpeg -h encoder=libx264
ffmpeg version 2.2.git Copyright (c) 2000-2014 the FFmpeg developers
  built on Mar 20 2014 12:34:26 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  configuration: --prefix=/home/superuser/ffmpeg_build --extra-cflags=-I/home/superuser/ffmpeg_build/include --extra-ldflags=-L/home/superuser/ffmpeg_build/lib --bindir=/home/superuser/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-x11grab
  libavutil      52. 67.100 / 52. 67.100
  libavcodec     55. 52.102 / 55. 52.102
  libavformat    55. 34.101 / 55. 34.101
  libavdevice    55. 11.100 / 55. 11.100
  libavfilter     4.  3.100 /  4.  3.100
  libswscale      2.  5.102 /  2.  5.102
  libswresample   0. 18.100 /  0. 18.100
  libpostproc    52.  3.100 / 52.  3.100
Encoder libx264 [libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10]:
    Threading capabilities: no
    Supported pixel formats: yuv420p yuvj420p yuv422p yuvj422p yuv444p yuvj444p nv12 nv16