bbo-svidreader 0.8.0

Video reader on top of imageio that allows to build custom filter-pipelines

videoreader

Videoreader, currently a pyav v3 wrapper, with the following features:

• Reading CCV-Files
• Preemptive cached video access
• Simoultanous threaded reading of multiple video files
• Effects applied by a pipelined graph-structure

Syntax

The syntax is mostly orientated on ffmpeg, generally [<input1>][<input2>]<effect=arg0=<arg0>>[<output>]

• Effects are sepperated by simikolon
• Inputs/Outputs of effects are defined in squared brackets
• arguments can be defined by effect

run_pipeline.py

This is a simple tool if you want to use the videoreader from the commandline. You can define the following options:

• '-i', '--input' <Can define multiple input-files>
• '-o', '--output' <Define where to write output>
• '-g', '--filtergraph' <The filtegraph which is applied>

Examples:

• python3 svidreader/run_pipeline.py -i ../test/cubes.mp4 --filtergraph "contrast" --output test.csv

List of effects:

• scale
  Scales input by a given factor
  scale: float, factor of scaling
• arange
  Aranges multiple inputs into a grid
  ncols: int, number of columns
• viewer
  Views the last read input backend: string, Backend to be used, values are matplotlib, ffplay, opencv
• bgr2gray
  Converts each RGB-input-frame to three grayscale-outputs
• cache
  Adds a cache with saves the last shown frames
• tblend
  Subtraction of the previous to the current frame
• perprojection
  Perspective projection from different camera-models