R:exifr: read_exif Does not extract data from 4K .MP4 files

[MangroveWatch]

Hello,
I have been a long time user of ExifTool and have recently switched over to using ExifTool in R using exifr::read_exif. I have used the following code to extract EXIF data from SONY m2ts/MTS, but the new Sony 4K .MP4 files don't work. Examining the output of all EXIF tags, I see the error: End of processing at large atom (LargeFileSupport not enabled)
I can only seem to find reference to how to fix this in CommandPrompt, not R, "adding -api largefilesupport=1 to your command", https://exiftool.org/forum/index.php?topic=9845.0.
How can this same command be implemented in R::exifr?

Example R code;
#Set Video File Location
survey.videos <- "Video_for_Analysis/EOD_2019/" #Folder with videos

#Get EXIF information

files2 <- list.files(survey.videos, pattern = NULL, recursive = FALSE, full.names = TRUE)
dat <- read_exif(files2, tags=c("directory", "filename", "DateTimeOriginal",
                                "Duration"))

Unfortunately the .MP4 videos in question are far too big to upload.

Many thanks in advance.
Jock

[StarGeek]

See this post.

[MangroveWatch]

Thank you 
It worked, sort of.
But.....
after editing the config file ExifTool_config (attached) and placing it into the R::exifr library directory eg: C:\Users\Jock\Documents\R\win-library\3.6\exifr\exiftool where exiftool.pl is located,
I can see the Duration tag, but not other tags like DateTimeOriginal. Although there is a tag CreationDateValue for MP4 - seems odd that these would be named differently.

I have attached a csv output of "dat" with tags for a combination of MTS, m2ts and MP4 video after using the following:

#Set File Locations
survey.videos <- "Video_for_Analysis/EOD_2019/" #Folder with videos
#Get EXIF information
files2 <- list.files(survey.videos, pattern = NULL, recursive = FALSE, full.names = TRUE)
dat <- read_exif(files2)

Any suggestions? Or do I just need to work around this in R to extract the Video date and start times when using a combination of video file types, which is easy enough to do?

[StarGeek]

I can see the Duration tag, but not other tags like DateTimeOriginal. Although there is a tag CreationDateValue for MP4 - seems odd that these would be named differently.

Do you see a DateTimeOriginal when you check the file with exiftool on the command line?

Usually, DateTimeOriginal is an EXIF tag and there is no standard for putting EXIF metadata in a video file.  Though that doesn't stop some companies from cramming it in there.  There is a Quicktime:DateTimeOriginal tag, but I don't think I've ever seen it used.

If I recall correctly, mts type files don't allow for any embedded metadata.  Exiftool just returns the various properties of the file.

[MangroveWatch]

Do you see a DateTimeOriginal when you check the file with exiftool on the command line?

No DateTimeOriginal data is available from CMD prompt either:

Code Select Expand

exiftool.pl -directory -filename -DateTimeOriginal -Duration  -T -r -n

See attached .txt file output.

[Phil Harvey]

Usually MP4 files do not contain DateTimeOriginal.  For these files use CreateDate instead.

- Phil