[digikam] [Bug 374453] Extract right video date from MP4 files metadata

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374453

caulier.gil...@gmail.com changed:

   What|Removed |Added

 Status|UNCONFIRMED |RESOLVED
 Resolution|--- |FIXED
   Version Fixed In||6.0.0

--- Comment #11 from caulier.gil...@gmail.com ---
With 6.0.0, we have now a FFMpeg low level metadata parser based on libav C API
for video files database registration.

The Exiv2 video support is not used anymore as this code is buggous and nobody
sound motivated in Exiv2 to finalize the code.

The original post for this file must be fixed now and video metadata support
with ffmpeg must be enough to populate database entries.

Gilles Caulier

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[digikam] [Bug 374453] Extract right video date from MP4 files metadata

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374453

caulier.gil...@gmail.com changed:

   What|Removed |Added

  Component|Metadata|Metadata-Video

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[digikam] [Bug 374453] Extract right video date from MP4 files metadata

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374453

matrix43...@gmail.com changed:

   What|Removed |Added

 CC||matrix43...@gmail.com

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[digikam] [Bug 374453] Extract right video date from MP4 files metadata

[wildcowboy]

https://bugs.kde.org/show_bug.cgi?id=374453

--- Comment #10 from wildcowboy  ---
(In reply to caulier.gilles from comment #9)
> Very interesting. Do you know if there is already somewhere a c++ interface
> to ffmpeg to read/write metadata on video ?

Is this close to what you are looking for?

https://ffmpeg.org/doxygen/2.0/doc_2examples_2metadata_8c-example.html

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[digikam] [Bug 374453] Extract right video date from MP4 files metadata

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374453

--- Comment #9 from caulier.gil...@gmail.com ---
Very interesting. Do you know if there is already somewhere a c++ interface to
ffmpeg to read/write metadata on video ?

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[digikam] [Bug 374453] Extract right video date from MP4 files metadata

[wildcowboy]

https://bugs.kde.org/show_bug.cgi?id=374453

--- Comment #8 from wildcowboy  ---
(In reply to caulier.gilles from comment #7)
> yes, we can do it through QtAV.
> 
> Try to use stand alone QtAv Player. Load a video and go to Info pannel.
> These ffmpeg metadata are there. So i'm sure more and less that QtAV can
> provide all these kind of data to client application as digiKam, without to
> use directly ffmpeg (and add direct ffpmeg dependencies to digiKam.
> 
> Gilles Caulier

It can write too. I just wrote GPS location into mp4 file using this command
ffmpeg -i inputfile -metadata location="+50.8893-114.0159/" outputfile

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[digikam] [Bug 374453] Extract right video date from MP4 files metadata

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374453

--- Comment #7 from caulier.gil...@gmail.com ---
yes, we can do it through QtAV.

Try to use stand alone QtAv Player. Load a video and go to Info pannel. These
ffmpeg metadata are there. So i'm sure more and less that QtAV can provide all
these kind of data to client application as digiKam, without to use directly
ffmpeg (and add direct ffpmeg dependencies to digiKam.

Gilles Caulier

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[digikam] [Bug 374453] Extract right video date from MP4 files metadata

[wildcowboy]

https://bugs.kde.org/show_bug.cgi?id=374453

--- Comment #6 from wildcowboy  ---
Hello Gilles,

This message also applicable to:
https://bugs.kde.org/show_bug.cgi?id=377072
https://bugs.kde.org/show_bug.cgi?id=377177

It turned out that ffmpeg is already able to read a lot of metadata we could
use.

Here is an output of an ffmeg -i command on a sample file:
---
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
'/mnt/data/FamilyPictures/2016/2016-10/20161008/20161007_190516.mp4':
  Metadata:
major_brand : mp42
minor_version   : 0
compatible_brands: isommp42
creation_time   : 2016-10-08T01:10:04.00Z
location: +50.8893-114.0159/
location-eng: +50.8893-114.0159/
com.android.version: 6.0.1
  Duration: 00:00:43.20, start: 0.00, bitrate: 16947 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
1920x1080, 16876 kb/s, 29.78 fps, 29.92 tbr, 90k tbn, 180k tbc (default)
Metadata:
  rotate  : 90
  creation_time   : 2016-10-08T01:10:04.00Z
  handler_name: VideoHandle
Side data:
  displaymatrix: rotation of -90.00 degrees
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo,
fltp, 256 kb/s (default)
Metadata:
  creation_time   : 2016-10-08T01:10:04.00Z
  handler_name: SoundHandle
---

Reading just these three fields

creation_time   : 2016-10-08T01:10:04.00Z
location: +50.8893-114.0159/
rotate  : 90 (or displaymatrix: rotation of -90.00 degrees)

will allow digiKam to:

1. Import video files in correct folders, rename them correctly on import
2. Show video files in chronological order when sort by date
3. Show video files on the map, add GPS information to the database
4. Preview video correctly per the rotation tag, create correct video
thumbnails

Is that possible to add the support of this on your roadmap? Let me know your
thoughts.

https://github.com/wang-bin/QtAV/issues/820#issuecomment-287545695

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[digikam] [Bug 374453] Extract right video date from MP4 files metadata

[wildcowboy]

https://bugs.kde.org/show_bug.cgi?id=374453

--- Comment #5 from wildcowboy  ---
Mediainfo reads the date well:

mediainfo FILE.mp4 | grep "Encoded date" | head -n 1

Example output:
Encoded date : UTC 2012-01-08 11:16:19

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[digikam] [Bug 374453] Extract right video date from MP4 files metadata

[wildcowboy]

https://bugs.kde.org/show_bug.cgi?id=374453

--- Comment #4 from wildcowboy  ---
I am wondering if this might help:
https://discuss.pixls.us/t/organize-images-videos-in-folders-by-month-date-taken/3156/10?u=andrius
There is a link to a piece of code of Rapid Photo Downloader responsible for
reading video files' creation date in the post. I tested it on my machine and
it worked well, all video files went to correct date folders

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[digikam] [Bug 374453] Extract right video date from MP4 files metadata

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https://bugs.kde.org/show_bug.cgi?id=374453

caulier.gil...@gmail.com changed:

   What|Removed |Added

Version|5.3.0   |5.4.0

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[digikam] [Bug 374453] Extract right video date from MP4 files metadata

[wildcowboy]

https://bugs.kde.org/show_bug.cgi?id=374453

wildcowboy  changed:

   What|Removed |Added

 CC||aegor...@gmail.com

--- Comment #3 from wildcowboy  ---
Confirmed on 5.4.0. For all mp4 files digiKam used a file modification date
instead of any content create date from metadata. Looks like exiv2 does not
read any metadata from mp4 files yet.

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[digikam] [Bug 374453] Extract right video date from MP4 files metadata

[Marc]

https://bugs.kde.org/show_bug.cgi?id=374453

--- Comment #2 from Marc  ---
Hello Gilles,

First, thanks for your quick answer.

I haven't the required knowledge to judge which is the better API to process
metadata: exiftool example was just to identify which component is responsible
of this display.

I'll give you a feedback with the 5.4 version.

Regards

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[digikam] [Bug 374453] Extract right video date from MP4 files metadata

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374453

caulier.gil...@gmail.com changed:

   What|Removed |Added

Summary|Display as Date the DateUTC |Extract right video date
   |metadata coming from MP4|from MP4 files metadata
   |files   |

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