I do not know. The interlaced clips that I have are working. Maybe the field phase is signaled incorrectly in your clips. If you want to send me a PM with a link to one of your clips, I am willing to take a look at it.
This is the same clip deinterlaced with a different tool, doubling the framerate from 25 fps to 50 fps. You see, here the result is correct. Something is wrong with the Shotcut function in the Convert to Edit Friendly dialog or FFmpeg bwdif filter with frame doubling. Shotcut has problems with interlaced material, but works well with progressive material. These are my findings.
Here is mine example showing Convert with Deinterlace works fine if you give it a clip with correct metadata about the field order. Brian suggested a possible problem with “field phase.” I know this better as “field order,” which is how it appears in Shotcut Properties. This is from a PAL DV clip.
I sent you the original avi file, YUV 4:2:2 as for UYVY but with different component ordering within the u_int32 macropixel, interlaced, top field first.
It looks like the file doesn’t contain any information about interlacing and frame order. You may have to set this in the importing tool.
This is what I did in Shotcut:
Sorry, now I got a better result. Maybe I didn’t pull the slider to “am besten” during my first attempts. But now I could only create an mkv, not an mp4 (why?).
Of the three options for “Good”, "Better’, “Best”, only the “Good” option produces an mp4 file.
If you sent me a private link to download a file, I did not receive it. Can you try again?
The Deinterlace option in the Convert dialog does not understand an override to the Field order in Properties in case you changed that.
I did not use the Override frame rate option to get the double frame rate. That option is to use temporal interpolation while changing frame rate, which is different than what we want while deinterlacing.
Yes. I see this also. There are two pieces of evidence:
When I load your source file, Shotcut shows the aspect ratio of 720x576 and scan mode of progressive:
When I run Hamburger Menu → More Information, I see:
sample_aspect_ratio=N/A
display_aspect_ratio=N/A
field_order=unknown
This means that the file is not providing scan mode and aspect ratio information.
This is not my experience. When I ran “Convert To Edit Friendly” on your file, I chose the “Deinterlace” option. It provided a pretty good looking picture:
The conversion did a good job or deinterlacing, but it did not correct the aspect ratio.
If I open the converted video in Shotcut, I can fix the aspect ratio by setting it in the properties panel (notice the Aspect Ratio override):
This is a far amount of steps to get a decent picture from your clip. In order to do better, we would need to add some more override options for the convert feature to allow the user to override the aspect ratio.
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