I try to modify the CreateDate of MOV file captured with iMovie from MiniDV.
I'm using a command:
exiftool '-quicktime:createdate<filecreatedate' Movies/test.mov
For some reason I get error message:
Error: Can't yet handle movie fragments when writing
How can I avoid this?
Nothing you can directly do to avoid it. The file structure is formatted in a way that exiftool can't properly parse. So rather then damaging the file, it exits.
If you can provide an sample and Phil has time, he might be able to allow exiftool to deal with this.
In the mean time, you might try remuxing the streams into a new file. It would be a lossless operation. FFMpeg can do this on the command line. Other options would be programs such as Handbrake, AVIDemux, and MKVToolNix.
It would be good to have a sample containing movie fragments. My email is philharvey66 at gmail.com if you can send it to me.
- Phil
Quote from: Phil Harvey on January 29, 2020, 03:44:02 PM
It would be good to have a sample containing movie fragments. My email is philharvey66 at gmail.com if you can send it to me.
- Phil
I just sent a sample of my file. It's really nice to have support to my problem.
Quote from: StarGeek on January 29, 2020, 03:02:18 PM
FFMpeg can do this on the command line.
If I use FFMpeg do I miss the original filecreatedate? That is the one I would like to keep and use as quicktime:createdate. I need to test that.
Quote from: uiski on January 30, 2020, 12:38:46 PM
I just sent a sample of my file. It's really nice to have support to my problem.
The sample you sent doesn't contain fragments.
- Phil
Quote from: uiski on January 30, 2020, 12:42:11 PM
If I use FFMpeg do I miss the original filecreatedate? That is the one I would like to keep and use as quicktime:createdate. I need to test that.
I believe there are options for FFmpeg to copy metadata as well as streams. I think it's the
-map_metadata option. Some of the other programs I mentioned don't preserve the metadata. But exiftool should be able to copy most standard metadata, though there are exceptions. For example, some cameras embed an EXIF block in videos, which is non-standard. But I don't think that there is any program that can copy non-standard data like that.
Quote from: Phil Harvey on January 31, 2020, 07:27:11 AM
Quote from: uiski on January 30, 2020, 12:38:46 PM
I just sent a sample of my file. It's really nice to have support to my problem.
The sample you sent doesn't contain fragments.
- Phil
Sorry, my mistake. I sent you a link to new sample.
Got it. Thanks. I'll work on this when I get a chance and post back here when I know more.
- Phil
Wow. It will be a lot of work to support movie fragments. There are a number of pointers in the related boxes that will need updating when the file is edited. And unfortunately your file doesn't contain an example of an mfra box (movie fragment random access), which may exist in fragmented movies and contains still more pointers that would require updating. Keeping track of these pointers and updating them properly is not trivial.
I will add this to my list of things to do, and your sample will help, but the bottom line is that it may be a while before ExifTool has the ability to write a file containing movie fragments.
- Phil