Created attachment 161158 [details]
Test MOV file

SUMMARY
I am facing a issue since update to version 23.04.3 under Linux Mint, i have many footage in .mov file that is made with PNG image, so it use the PNG codec.
This footage are from the Footagecrate website (the free footage) and many i made myself with Natron.
I always use it in Kdenlive, all was right, and since the last (maybe 2 last, since the last time i use it was in April this year and it was working), on the last version, when i import this type of file, it detect it as a sound track that is just not usable.
But if i open a project that use this file, all is working.
Of course all the file are ok and work perfectly with VLC.
I try to copy the sequence from the working project, but when i past it on the new i get the exact same issue.
If i import a standard .mov video from a Iphone, it work, but not a footage using png codec.

STEPS TO REPRODUCE
1. Import a MOV footage (that is a sequence of png image like the one downloaded to Footagecrate website or other), attached a .mov sample on this report that you can test.

OBSERVED RESULT
It is imported as a unusable audio file

EXPECTED RESULT
Import like a standard video

SOFTWARE/OS VERSIONS
Linux : Linux Mint 21.1 Cinnamon
Kdenlive : 23.04.3

ADDITIONAL INFORMATION
I found a temporary solution, i open the .kdenlive project file in a text editor to compare a new one i save with the import issue and a old project that work, i see one difference, the new one has this line :

    <property name=“set.test_image”>1</property>

So i remove this line or put it to 0, and the next must be change from -1 to 0 :

    <property name=“video_index”>-1</property>

Save the file and that work, must to that for each file imported.

The line <property name=“set.test_image”>1</property> is not present on older version, i suppose there is a issue with that also.