Jeroen Lapre'


About Me

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My Talks

obj-image SIGGRAPH
Science-Based Storytelling in Planetarium Show Production

Recent Forum Posts

Houdini Trainer Needed on Site in Baltimore for 1 Week ASAP Oct. 20, 2019, 2:33 p.m.

NASA science visualization department wants to transition from another popular 3D application to Houdini.
Houdini trainer needs to be experienced in ingesting large amounts of science data and presenting it in a way the general public can comprehend. You need to be able to teach artists, that use this other application, how to transition to Houdini in this context.
You will be flown to Baltimore, travel expenses paid, to provide on-site training for a week.

Ability to Freeze File Compositing Node Oct. 2, 2019, 4:31 p.m.

I would find it helpful if I could freeze a File compositing node: []

i.e. like the way you can freeze a geometry file in read mode.
Otherwise I have to archive the directory structure of my houdini project to include the directory containing the image file, with file paths relative to hip.
I'm assuming others would find this useful?

PDG ffmpeg encode example fails without printing errors May 22, 2019, 5:41 p.m.

Hi Brandon,
thanks for showing me how to view the logs of a work item.
It helped me track down the problem.

Here is the error log for the ffmpegencode1 TOP node:

ffmpeg version 2.6.2 Copyright © 2000-2015 the FFmpeg developers
built with Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM 3.6.0svn)
configuration: –prefix=/usr/local/Cellar/ffmpeg/2.6.2 –enable-shared –enable-pthreads –enable-gpl –enable-version3 –enable-hardcoded-tables –enable-avresample –cc=clang –host-cflags= –host-ldflags= –enable-libx264 –enable-libmp3lame –enable-libvo-aacenc –enable-libxvid –enable-vda
libavutil 54. 20.100 / 54. 20.100
libavcodec 56. 26.100 / 56. 26.100
libavformat 56. 25.101 / 56. 25.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 11.102 / 5. 11.102
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Unrecognized option ‘apply_trc’.
Error splitting the argument list: Option not found
Executing command: “/usr/local/bin/ffmpeg” -y -r 12/1 -f concat -safe 0 -apply_trc iec61966_2_1 -i “/tmp/houdini_temp/ffmpeg.v01/pdgtemp/2894/ffmpegencodevideo10_framelist.txt” -c:v libx264 -vf “fps=12,format=yuv420p” -movflags faststart “/Users/jeroenlapre/Documents/viz/projects/dev/houdini/pdg/videos/ffmpegencodevideo10.mp4”

The version of ffpmeg I'm using doesn't recognise the option apply_trc

I enabled the FFmpeg command field, and changed it from:

{ffmpeg} -y -r {frames_per_sec}/1 -f concat -safe 0 -apply_trc iec61966_2_1 -i “{frame_list_file}” -c:v libx264 -vf “fps={frames_per_sec},format=yuv420p” -movflags faststart “{output_file}”


{ffmpeg} -y -r {frames_per_sec}/1 -f concat -safe 0 -i “{frame_list_file}” -c:v libx264 -vf “fps={frames_per_sec},format=yuv420p” -movflags faststart “{output_file}”

And now it works!

Much thanks.