Video tag versus ExifTool

Hello, here after is my script to add the video "format" to the name of my movies...

var format = '';
if (item.videoWidth == 0) {
format = '';
} else if (item.videoWidth < 1280) {
if (item.videoHeight < 576) {
format = ' SD NTSC';
} else {
format = ' SD PAL-SECAM';
}
} else if (item.videoWidth < 1920) {
format = ' HD 720p';
}
else if (item.videoWidth < 3840) {
format = ' HD 1080p';
}
else if (item.videoWidth < 7680) {
format = ' UHD 4K';
}
else {
format = ' UHD 8K';
}
format = format + ' (' + item.videoWidth + 'x' + item.videoHeight + ')';
return item.newBasename + format;


Unfortunately, for some movies, item.videoWidth and item.videoHeight are null.
But I noticed that the correct size is available via the ExifTool.

So I can replace item.videoWidth and item.videoHeight with:
var w = item.exifToolValue('ImageWidth');
var h = item.exifToolValue('ImageHeight');

but this is much slower...

Any idea why the video tags don't have a value?
I did compare a movie with the issue and another one that works fine (using MediaInfo v0.7.70) and didn't see any relevant difference.

Here is the info of a movie for which AR returns an empty width:

Format : Matroska
Format version : Version 2
File size : 7.95 GiB
Duration : 1h 48mn
Overall bit rate : 10.5 Mbps
Encoded date : UTC 2009-05-10 09:57:49
Writing application : mkvmerge v2.7.0 ('Do It Again') built on Apr 16 2009 22:41:30
Writing library : libebml v0.7.7 + libmatroska v0.8.1

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : [email protected]
Format settings, CABAC : Yes
Format settings, ReFrames : 5 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 1h 48mn
Bit rate : 8 202 Kbps
Width : 1 920 pixels
Height : 816 pixels
Display aspect ratio : 2.35:1
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.218
Stream size : 6.06 GiB (76%)
Title : Video
Writing library : x264 core 67 r1128M 682b54d
Encoding settings : cabac=1 / ref=5 / deblock=1:0:0 / analyse=0x3:0x2 / me=umh / subme=7 / psy_rd=1.0:0.0 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / chroma_qp_offset=-2 / threads=6 / nr=0 / decimate=1 / mbaff=0 / bframes=3 / b_pyramid=1 / b_adapt=1 / b_bias=0 / direct=1 / wpredb=1 / keyint=250 / keyint_min=25 / scenecut=40 / rc=2pass / bitrate=8202 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / pb_ratio=1.30 / aq=1:1.00
Language : French
Default : Yes
Forced : No


And here is one for which AR returns the correct Widh :

Format : Matroska
Format version : Version 2
File size : 8.75 GiB
Duration : 1h 58mn
Overall bit rate : 10.6 Mbps
Encoded date : UTC 2009-05-10 09:16:30
Writing application : mkvmerge v2.7.0 ('Do It Again') built on Apr 16 2009 22:41:30
Writing library : libebml v0.7.7 + libmatroska v0.8.1

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : [email protected]
Format settings, CABAC : Yes
Format settings, ReFrames : 5 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 1h 58mn
Bit rate : 8 279 Kbps
Width : 1 920 pixels
Height : 816 pixels
Display aspect ratio : 2.35:1
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.220
Stream size : 6.69 GiB (76%)
Title : Video
Writing library : x264 core 67 r1128M 682b54d
Encoding settings : cabac=1 / ref=5 / deblock=1:0:0 / analyse=0x3:0x2 / me=umh / subme=7 / psy_rd=1.0:0.0 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / chroma_qp_offset=-2 / threads=6 / nr=0 / decimate=1 / mbaff=0 / bframes=3 / b_pyramid=1 / b_adapt=1 / b_bias=0 / direct=1 / wpredb=1 / keyint=250 / keyint_min=25 / scenecut=40 / rc=2pass / bitrate=8279 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / pb_ratio=1.30 / aq=1:1.00
Language : French
Default : Yes
Forced : No

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