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
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