Interactive Temporal Video Consistency

teaser_trimmed2.mp4

Project Page | Paper

Blind video consistency produces temporally consistent videos from per-frame processed/stylized inputs without knowledge of the applied processing methods.

This repo implements a low-latency method for improving temporal consistency in high-resolution videos and video streams and offers interactive control over the flickering amount.

Official Implementation of:
"Interactive Control over Temporal Consistency while Stylizing Video Streams"
Sumit Shekhar*, Max Reimann*, Moritz Hilscher, Amir Semmo, Jürgen Döllner, Matthias Trapp
*equal contribution
in Computer Graphics Forum (EGSR Special Edition), 2023

Installation

Requires CUDA (11.4+) and QT 5.11+

To install, simply run the cmake (preferrably in a directory "build"), CMake will automatically download a CUDA-enabled build of ONNXRuntime. Then build (e.g with make).

After building, two binaries are found in the build directory: FlowVideoConsistency is the CLI-based application for processing videos to file, FlowVideoConsistencyPlayer the interactive GUI application for live-viewing.

Usage options

Process Frame directories:

Usage: ./FlowVideoConsistency -c pwcnet-light originalFrames processedFrames stabilizedFrames

Options:
  -?, -h, --help                    Displays this help.
  -c, --compute <model>             Compute optical flow using <model>. One of
                                    ['pwcnet', 'pwcnet-light']
  -f, --flow-directory <directory>  Read flow from <directory>. Alternative to compute

Arguments:
  originalFrames                    Original frame directory
  processedFrames                   Processed frames directory
  stabilizedFrames                  Output directory for stabilized frames

Frames must be of format 123456.png and start with index 1 (mirroring ffmpeg frame naming scheme)

Process input videos, write frames:

Usage: ./FlowVideoConsistency -c pwcnet-light test/input.mp4  test/processed.mp4 test/output

Process input videos, directly encode output video:

Usage: ./FlowVideoConsistency -c pwcnet-light ../videos/input.mp4 ../videos/processed.mp4 output.mp4

Start FlowVideoConsistencyPlayer GUI:

./FlowVideoConsistencyPlayer

To use the fast setting (i.e. downscale flow computation), an environment variable FLOWDOWNSCALE can be set. I.e., to downscale by 2x (a recommended factor when processing full-HD), set FLOWDOWNSCALE=2 ./FlowVideoConsistencyPlayer.

Code structure

• model-conversion contains our trained pytorch models and onnx conversion and testing code.
• src/decoding contains libav/ffmpeg handling to decode two concurrent streams into Qt images
• src/gui contains the Qt-based VideoPlayer GUI
• src/inference contains wrapper code for onnxruntime models
• src/ort_custom_ops contains our CPU and CUDA onnxruntime custom ops for the correlation and warping kernels
• src/stabilization contains the stabilization routines, as well as flow loading/flow model execution as well as various helpers

Code was tested under linux 20.04 and should work under windows as well.

Citation

@article {10.1111:cgf.14891,
  journal = {Computer Graphics Forum},
  title = {{Interactive Control over Temporal Consistency while Stylizing Video Streams}},
  author = {Shekhar, Sumit and Reimann, Max and Hilscher, Moritz and Semmo, Amir and Döllner, Jürgen and Trapp, Matthias},
  year = {2023},
  publisher = {The Eurographics Association and John Wiley & Sons Ltd.},
  ISSN = {1467-8659},
  DOI = {10.1111/cgf.14891}
}