Hi,
I recently picked up a Nokia Lumia 920 WP8 Phone, and I've found that the mp4 video's seem to be missing EXIF dates. Could this be I am not using the correct command to view the dates or is the data actually missing?
C:\Users\m\Videos>exiftool -time:all -a -G0:1 wp_20130123*.mp4
[File:System] File Modification Date/Time : 2013:01:23 11:14:17-05:00
[File:System] File Access Date/Time : 2013:01:23 11:16:07-05:00
[File:System] File Creation Date/Time : 2013:01:23 11:16:07-05:00
[QuickTime] Create Date : 1900:01:00 00:00:00
[QuickTime] Modify Date : 1900:01:00 00:00:00
[QuickTime:Track1] Track Create Date : 1900:01:00 00:00:00
[QuickTime:Track1] Track Modify Date : 1900:01:00 00:00:00
[QuickTime:Track1] Media Create Date : 1900:01:00 00:00:00
[QuickTime:Track1] Media Modify Date : 1900:01:00 00:00:00
[QuickTime:Track2] Track Create Date : 1900:01:00 00:00:00
[QuickTime:Track2] Track Modify Date : 1900:01:00 00:00:00
[QuickTime:Track2] Media Create Date : 1900:01:00 00:00:00
[QuickTime:Track2] Media Modify Date : 1900:01:00 00:00:00
Regards,
Merrick
Hi Merrik,
The MP4 format doesn't officially support EXIF, so it isn't very common to find EXIF information in these videos. It is the QuickTime CreateDate that you should look at in these, but unfortunately the software that created your MP4 didn't fill this in. :(
If you want me to take a look for any other proprietary dates that might not be currently decoded, you can send the file to me (philharvey66 at gmail.com).
- Phil
Hi - I just emailed the file ...
I got the file, thanks.
Using the -v3 option to probe this file reveals all of the metadata that is available. If some proprietary information was hiding in there it would likely be in the UserData section (at the end of the -v3 output), but unfortunately there isn't anything useful here in this image. Also, you can see that all of the date/time information in the MovieData section is all zeros.
So I can't find any useful date/time information in this file, sorry.
The only other possibility is that there is a timestamp embedded in the video data stream, but currently ExifTool doesn't parse the video stream in MP4 files.
- Phil
Quote from: Phil Harvey on January 23, 2013, 12:47:52 PM
I got the file, thanks.
Using the -v3 option to probe this file reveals all of the metadata that is available. If some proprietary information was hiding in there it would likely be in the UserData section (at the end of the -v3 output), but unfortunately there isn't anything useful here in this image. Also, you can see that all of the date/time information in the MovieData section is all zeros.
So I can't find any useful date/time information in this file, sorry.
The only other possibility is that there is a timestamp embedded in the video data stream, but currently ExifTool doesn't parse the video stream in MP4 files.
- Phil
Hi,
Thanks for taking a look. Pretty lame that they don't include reasonable meta-dates in the file. I guess the best info is the file create/modify date. And I have to be careful how I transfer the file; When I used Microsoft's new phone transfer app, those dates became the transfer date; exactly the situation I try to avoid. But when I use explorer, it seems to leave those dates as-is.
Thanks again.
Regards,
Merrick