Thermimage (version 4.0.1)

convertflirVID: Convert FLIR CSQ or SEQ into PNG or AVI, using shell commands.

Description

Invoking shell commands to act on a FLIR video (SEQ or CSQ file type) and calls the exiftool -RawThermalImage option to extract the raw, binary thermal image frames in 16 bit format and pass these to ffmpeg to convert the output as a series of png files or as an avi video file.

Usage

convertflirVID(imagefile, exiftoolpath="installed", perlpath="installed",
fr=30, res.in="1024x768", res.out="1024x768", outputcompresstype="jpegls", 
outputfilenameroot=NULL, outputfiletype="avi", outputfolder="output", verbose=FALSE,...)

Arguments

imagefile

Name of the FLIR SEQ or CSQ file to read from, as captured by the thermal camera. A character string.

exiftoolpath

A character string that determines whether Exiftool has been "installed" or not. If Exiftool has been installed in a specific location, use to direct to the folder location.

perlpath

A character string that determines whether Perl has been "installed" or not. If Perl has been installed in a specific location, use to direct to the folder location.

fr

Frame rate of input video data, frames per sec. Default = 30.

res.in

Input file image resolution in text format, "wxh". Default = "640x480"

res.out

Desired output file image resolution in text format, "wxh". Decrease to make smaller file, but maintain same aspect ratio. Default = "640x480".

outputcompresstype

Desired output file image compression format. Possible values are "tiff", "png" or "jpegls" (or any modifier from ffmpeg -vcodec). Default = "png".

outputfilenameroot

The base root of the output file(s) to be exported, without the indexing. If NULL, then the input filenameroot will be used and a numeric index attached. Default is NULL.

outputfiletype

Desired output file type, "avi" or "png". If "png", multiple files will be exported. If "avi", a single video file will be exported. Default = "avi"

outputfolder

Desired output subfolder name, placed inside the folder where the input files are stored. Default = "output".

verbose

Provides the command line output if verbose=TRUE. Default = FALSE.

…

Other values to pass to command line functions.

Value

No output generated in R. Shell call to exiftool, imagemagick, and ffmpeg to convert files.

Details

Calls exiftool, imagemagick, and ffmpeg in shell to convert a thermal image video file (SEQ or CSQ) into a 16 bit grayscale avi or series of images corresponding to each frame of the input video.

References

1. https://www.sno.phy.queensu.ca/~phil/exiftool/

2. https://www.imagemagick.org/script/index.php

3. https://www.eevblog.com/forum/thermal-imaging/csq-file-format/

See Also

convertflirJPG, ffmpegcall, readflirJPG,

Examples

# NOT RUN {
# Based on the following command line unix code, this function will convert a 
# flir jpg into a 16 bit greyscale video or sequence of images for import into imageJ

# Equivalent command line code:
# ffmpeg -f image2 -vcodec tiff -r 30 -s 640x480 -i 'output/frame%05d.tiff' -pix_fmt gray16be 
# -vcodec png -s 640x480 file.avi

# Examples 
# See https://github.com/gtatters/FLIRJPGConvert/blob/master/Examples.R

# See https://github.com/gtatters/FLIRJPGConvert/blob/master/FLIRJPG_Convert.R 

# See https://github.com/gtatters/Thermimage/blob/master/README.md


# }