Please ignore my previous email. I got some text mixed up. Here is an
improvement:
On 25/09/2018 18:38, bstoeger wrote:
Ping...?
This now uses |libxml2| (dislike the interface and documentation, but
what can you do) instead of a hand-crafted parser. This seems very low
risk. I tested it on 2 synthetic examples and ran it on a directory of
~100 videos. No issues. No confirmation on real-world data though
(@willemferguson <https://github.com/willemferguson>?).
Code is not nice, but I see no point in polishing it until we try to
extract more usable data from the XMP block [e.g. GPS?]. But here too,
working on that makes little sense until we get access to real-world
examples.
If there is no interest in this feature - let's dump it.
— You are receiving this because you were mentioned. Reply to this
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<https://github.com/Subsurface-divelog/subsurface/pull/1684#issuecomment-424412624>,
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Berthold,
Great apologies for you having to ping me.
The video file does not have any date-time attributes defined because it
comprises a merger of a number of small videos All of the same date but
of different times of day). Consequently OpenShot cannot assign
date-times to the combined video and they all appear as zero values. I
messed around with the video file, defining different dates to all the
relevant data attributes of the video. (1) Using Subsurface Version
4.8.2 (public release) =================================== Selected dive
date/time: Sat Sep 8 15:23:19 2018 GMT Files with inappropriate
date/time:
/home/willem/Downloads/exiftool/Image-ExifTool-11.10/whaleshark.mp4 -
Fri Sep 28 12:05:05 2018 GMT This is the *Media Create Date* attribute.
(2) Using Subsurface Version 8.8.2-71
===================================== Selected dive date/time: Sat Sep 8
15:23:19 2018 GMT Files with inappropriate date/time:
/home/willem/Downloads/exiftool/Image-ExifTool-11.10/whaleshark.mp4 -
Tue Sep 25 12:01:05 2018 GMT
This is the *Date/Time Original* attribute Here are the attributes for
the video file as seen by ExifTool:
(3) Using original video:
================ Here are the results using Subsurface Version 8.8.2-71
on one of the original video files:
Selected dive date/time: Sun Jul 1 12:17:37 2018 GMT
Files with inappropriate date/time:
/home/willem/Downloads/exiftool/Image-ExifTool-11.10/whaleshark.MOV_original
- Mon Jul 2 18:02:10 2018 GMT
This is possibly the *Date/Time Original* attribute, but all the
date-time values are the same in the original file so it is pretty
ambiguous.
Here are the metadata for the combined video file (.mp4): $ exiftool
whaleshark.mp4 ExifTool Version Number : 11.10File Name :
whaleshark.mp4Directory : .File Size : 106 MBFile Modification Date/Time
: 2018:09:26 19:48:32+02:00File Access Date/Time : 2018:09:26
19:48:34+02:00File Inode Change Date/Time : 2018:09:26
19:48:33+02:00File Permissions : rwxrwxrwxFile Type : MP4File Type
Extension : mp4MIME Type : video/mp4Major Brand : MP4 Base Media v1 [IS0
14496-12:2003]Minor Version : 0.2.0Compatible Brands : isom, iso2, avc1,
mp41Movie Data Size : 111009714Movie Data Offset : 48Movie Header
Version : 0Time Scale : 1000Duration : 0:00:57Preferred Rate :
1Preferred Volume : 100.00%Preview Time : 0 sPreview Duration : 0
sPoster Time : 0 sSelection Time : 0 sSelection Duration : 0 sCurrent
Time : 0 sNext Track ID : 3Track Header Version : 0Track Create Date :
2018:09:29 12:05:05Track Modify Date : 0000:00:00 00:00:00Track ID :
1Track Duration : 0:00:57Track Layer : 0Track Volume : 0.00%Image Width
: 1280Image Height : 720Graphics Mode : srcCopyOp Color : 0 0
0Compressor ID : avc1Source Image Width : 1280Source Image Height : 720X
Resolution : 72Y Resolution : 72Bit Depth : 24Video Frame Rate :
24Matrix Structure : 1 0 0 0 1 0 0 0 1Media Header Version : 0Media
Create Date : 2018:09:28 12:05:05Media Modify Date : 0000:00:00
00:00:00Media Time Scale : 44100Media Duration : 0:00:57Media Language
Code : undHandler Description : SoundHandlerBalance : 0Audio Channels :
2Audio Bits Per Sample : 16Audio Sample Rate : 44100Handler Type :
MetadataHandler Vendor ID : AppleEncoder : Lavf57.83.100XMP Toolkit :
Image::ExifTool 11.10Date/Time Original : 2018:09:25 12:01:05Date/Time
Modified : 2018:09:26 12:05:05Create Date : 2018:09:27 12:05:05Modify
Date : 2018:09:09 06:55:00Avg Bitrate : 15.3 MbpsImage Size :
1280x720Megapixels : 0.922Rotation : 0
The way that Subsurface handles it appears pretty logical. I will be
diving for the following week and will do some more video photography
and do some more tests when I am back on Oct 7th.
Here are the metadata for the original video file:
$ exiftool whaleshark.MOV
ExifTool Version Number : 11.10File Name : whaleshark.MOVDirectory :
.File Size : 210 MBFile Modification Date/Time : 2018:09:13
07:44:41+02:00File Access Date/Time : 2018:09:13 07:44:54+02:00File
Inode Change Date/Time : 2018:09:13 07:44:42+02:00File Permissions :
rwxrwxrwxFile Type : MOVFile Type Extension : movMIME Type :
video/quicktimeMajor Brand : Apple QuickTime (.MOV/QT)Minor Version :
2007.9.0Compatible Brands : qt , CAEPMovie Data Size : 219992360Movie
Data Offset : 98312Compressor Version :
CanonAVC0010/02.00.00/00.00.00Exif Byte Order : Little-endian (Intel,
II)Orientation : Horizontal (normal)Resolution Unit : inchesY Cb Cr
Positioning : Co-sitedExposure Time : 0F Number : undefExposure Program
: Program AESensitivity Type : Recommended Exposure IndexRecommended
Exposure Index : 0Exif Version : 0230Date/Time Original : 2018:07:02
18:02:10Components Configuration : Y, Cb, Cr, -Shutter Speed Value :
1Aperture Value : 9.5Exposure Compensation : 0Metering Mode :
Center-weighted averageFlash : Off, Did not fireFocal Length : 18.0
mmMacro Mode : NormalSelf Timer : OffQuality : n/aCanon Flash Mode :
n/aContinuous Drive : MovieFocus Mode : Movie Servo AFRecord Mode :
MOVCanon Image Size : 1920x1080 MovieEasy Mode : ManualDigital Zoom :
NoneContrast : NormalSaturation : NormalCamera ISO : AutoFocus Range :
Not KnownCanon Exposure Mode : Program AELens Type : Canon EF-S 18-55mm
f/3.5-5.6 IS STMMax Focal Length : 55 mmMin Focal Length : 18 mmFocal
Units : 1/mmMax Aperture : 3.6Min Aperture : 23Flash Activity : 0Flash
Bits : (none)Zoom Source Width : 0Zoom Target Width : 0Manual Flash
Output : n/aColor Tone : NormalAuto ISO : 100Measured EV : 11.25Target
Exposure Time : 1White Balance : AutoSlow Shutter : NoneShot Number In
Continuous Burst : 0Optical Zoom Code : n/aCamera Temperature : 36
CFlash Guide Number : 0Flash Exposure Compensation : 0Auto Exposure
Bracketing : OffAEB Bracket Value : 0Control Mode : Camera Local
ControlMeasured EV 2 : 11.25Bulb Duration : 0Camera Type : EOS
High-endND Filter : n/aCanon Image Type : MVI:Canon EOS REBEL SL1Canon
Firmware Version : Firmware Version 1.0.0Owner Name : Canon Model ID :
EOS Rebel SL1 / 100D / Kiss X7Thumbnail Image Valid Area : 0 159 16
103Time Zone : +00:00Time Zone City : LondonDaylight Savings :
OffBracket Mode : OffBracket Value : 0Bracket Shot Number : 0Raw Jpg
Size : LargeWB Bracket Mode : OffWB Bracket Value AB : 0WB Bracket Value
GM : 0Live View Shooting : OnFocus Distance Upper : 0.38 mFocus Distance
Lower : 0.35 mFlash Exposure Lock : OffLens Model : EF-S18-55mm
f/3.5-5.6 IS STMInternal Serial Number : HA0252828Crop Left Margin :
0Crop Right Margin : 0Crop Top Margin : 0Crop Bottom Margin : 0Exposure
Level Increments : 1/2 StopISO Expansion : OffHighlight Tone Priority :
DisableAF Assist Beam : EmitsMirror Lockup : DisableShutter Button AF On
Button : Metering + AF startSet Button When Shooting : Normal
(disabled)LCD Display At Power On : DisplayTone Curve :
StandardSharpness : 5Sharpness Frequency : n/aSensor Red Level : 0Sensor
Blue Level : 0White Balance Red : 0White Balance Blue : 0Color
Temperature : 5200Picture Style : StandardDigital Gain : 0WB Shift AB :
0WB Shift GM : 0Color Space : sRGBVRD Offset : 0Sensor Width :
5280Sensor Height : 3528Sensor Left Border : 84Sensor Top Border :
64Sensor Right Border : 5267Sensor Bottom Border : 3519Black Mask Left
Border : 0Black Mask Top Border : 0Black Mask Right Border : 0Black Mask
Bottom Border : 0Picture Style User Def : Auto; Auto; AutoPicture Style
PC : None; None; NoneCustom Picture Style File Name : Peripheral
Illumination Corr : OffAuto Lighting Optimizer : LowLong Exposure Noise
Reduction : OffHigh ISO Noise Reduction : StandardLens Serial Number :
000026e87bUser Comment : Sub Sec Time : 46Sub Sec Time Original : 46Sub
Sec Time Digitized : 46Flashpix Version : 0100Exif Image Width : 160Exif
Image Height : 120Interoperability Index : THM - DCF thumbnail
fileInteroperability Version : 0100Related Image Width : 1920Related
Image Height : 1080Focal Plane X Resolution : 178.9709172Focal Plane Y
Resolution : 201.0050251Focal Plane Resolution Unit : inchesCustom
Rendered : NormalExposure Mode : AutoScene Capture Type : StandardSerial
Number : 022070018769Lens Info : 18-55mm f/0Encoding Process : Baseline
DCT, Huffman codingBits Per Sample : 8Color Components : 3Y Cb Cr Sub
Sampling : YCbCr4:2:2 (2 1)Thumbnail Image : (Binary data 8879 bytes,
use -b option to extract)XMP Toolkit : Image::ExifTool 11.10Make :
CanonModel : Canon EOS REBEL SL1User Rating : 0Movie Header Version :
0Create Date : 2018:09:09 18:02:10Modify Date : 2018:09:09 18:02:10Time
Scale : 25000Duration : 0:00:41Preferred Rate : 1Preferred Volume :
100.00%Preview Time : 0 sPreview Duration : 0 sPoster Time : 0
sSelection Time : 0 sSelection Duration : 0 sCurrent Time : 0 sNext
Track ID : 3Track Header Version : 0Track Create Date : 2018:07:02
18:02:10Track Modify Date : 2018:07:02 18:02:10Track ID : 1Track
Duration : 0:00:41Track Layer : 0Track Volume : 0.00%Image Width :
1920Image Height : 1080Graphics Mode : srcCopyOp Color : 0 0 0Compressor
ID : avc1Source Image Width : 1920Source Image Height : 1080X Resolution
: 72Y Resolution : 72Bit Depth : 24Video Frame Rate : 25Matrix Structure
: 1 0 0 0 1 0 0 0 1Media Header Version : 0Media Create Date :
2018:07:02 18:02:10Media Modify Date : 2018:07:02 18:02:10Media Time
Scale : 48000Media Duration : 0:00:41Balance : 0Handler Class : Data
HandlerHandler Type : Alias DataAudio Format : sowtAudio Bits Per Sample
: 16Audio Sample Rate : 48000Layout Flags : StereoAudio Channels :
2Aperture : undefAvg Bitrate : 42.5 MbpsDrive Mode : Continuous
ShootingImage Size : 1920x1080Lens : 18.0 - 55.0 mmLens ID : Canon EF-S
18-55mm f/3.5-5.6 IS STMMegapixels : 2.1Rotation : 0Scale Factor To 35
mm Equivalent: 1.6Shooting Mode : Program AEShutter Speed : 0Create Date
: 2018:07:02 18:02:10.46Date/Time Original : 2018:07:02
18:02:10.46Modify Date : 2018:07:02 18:02:10.46Circle Of Confusion :
0.019 mmDepth Of Field : 0.00 m (0.36 - 0.36 m)Field Of View : 64.5
degFocal Length : 18.0 mm (35 mm equivalent: 28.5 mm)Hyperfocal Distance
: Inf mLens : 18.0 - 55.0 mm (35 mm equivalent: 28.5 - 87.2 mm) $
Kind regards,
willem
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