Until we have a practical implementation of Teflon, we can still use the building blocks that Teflon will be able to automate later. This cookbook is a list of commands and options that proved to be useful in our work. Please read the White Paper to understand the workflow that we are trying to implement, to see how these examples fit into the bigger picture.

This document has the following sections:

1. FFmpeg Recepies
2. OIIOtool Recepies

This section collects recepies regarding the FFmpeg utility. FFmpeg's strength lies in the ability to process video formats and it's weakness is the lack of outputting floatingpoint images and coherent color correction.

• -y : answers yes to overwrite questions.
• -g N : keyframe every Nth keyframes, to tune scrub performance.
• -start_number: use this if a sequence does not start at 0 or 1. Use it before the -i it belongs.
• -ss: fast seek into the file in seconds. Use it before the -i it belongs.
• -t: length of conversion in seconds.
• -vf scale=320:240: scales the output image. See the Scaling Wiki for details.
• -hide_banner : removes the banner from the beginning of output.

ffprobe -hide_banner video_file.mov

ffmpeg -h encoder=hevc_nvenc

ffmpeg -i h264/test.mov -c:v dnxhd -b:v 36M test.mov

ffmpeg -i input.%06d.tif -r:v 24 -c:v libvpx-vp9 -g 1 -crf 23 -b:v 2000k output.webm

ffmpeg -i test_sequence.%06d.tif -r:v 24 -c:v libvpx-vp9 -pass 1 -b:v 8000K -g 6 -crf 11 -threads 8 -speed 2 \
  -tile-columns 6 -frame-parallel 1 \
  -an -f webm /dev/null && \
ffmpeg -i test_sequence.%06d.tif -r:v 24 -c:v libvpx-vp9 -pass 2 -b:v 8000K -g 6 -crf 11 -threads 8 -speed 2 \
  -tile-columns 6 -frame-parallel 1 -auto-alt-ref 1 -lag-in-frames 25 \
  -c:a libopus -b:a 64k -f webm test_video.webm

ffmpeg -i test_sequence_%06d.tif -c:v h264_nvenc -preset slow -b:v 8M -g 6 test_video.mp4

ffmpeg -apply_trc iec61966_2_1 -i input_%06d.exr output.mp4

ffmpeg -apply_trc iec61966_2_1 -i input_%06d.exr -pix_fmt yuv420p \
    -c:v h264_nvenc -preset slow -b:v 8M -g 6 output.mp4

ffmpeg -ss 16.333333 -i test_video.mov \
    -t 7.083333 test_sequence.%06d.tif

This section collects recepies regarding the OpenImageIO's oiiotool utility. Oiiotools' strength is the handling of sequences of still images and the integration of OpenColorIO, while it's weakness is the lack of professional support of video stream formats.

• -d: Sets the data format, for example uint8.

oiiotool --info:format=xml -v test_image.jpg

oiiotool test.1-100%d.tif --quality 95 --resize 50% -o jpg/test.1-100%d.jpg

oiiotool -v test_sequence_%06d.exr \
    --colorconvert linear sRGB -ch R,G,B -d uint8 --compression none \
    -o /tmp/teflon_arena/test_sequence_%06d.tif