The story.....
MeGUI has different de-interlacing "categories", and each lets you choose several different de-interlacing methods accordingly (or it automatically selects one after an analysis). After some recent experimenting and discussing it with one of the MeGUI developers, it appeared MeGUI was adding the wrong de-interlacing to the script for one of those "categories" (#8 below), which has been changed. However I'm still unsure as to whether MeGUI's de-interlacing is correct, but as the current MeGUI developer lives in PAL-Land as I do, neither of us are very expert when it comes to NTSC.
Currently the de-interlacing categories for MeGUI are as follows:
1. "Progressive"
2. "Interlaced"
3. "Film"
4. "M-in-5 Decimation"
5. "Hybrid film/interlaced. Mostly film": Mix of film & interlaced
6. "Hybrid film/interlaced. Mostly interlaced" Mix of film & interlaced
7. "Partially interlaced": Mix of interlaced & progressive
8. "Partially film": Mix of film & progressive
Most of the above is fairly self explanatory and the appropriate de-interlacing methods for each category are what you'd expect. My question involves the distinction between numbers 5 and 8... as to whether there should be one, and if so, what should it be? Currently MeGUI applies exactly the same de-interlacing for both categories, which to my way of thinking either makes one of them redundant, or #8 is possibly still wrong.
This is an example of what MeGUI currently adds to the script.
5. "Hybrid film/interlaced. Mostly film": Mix of film & interlaced:
tfm(order=-1).tdecimate(hybrid=1)
8. "Partially film": Mix of film & progressive:
tfm(order=-1).tdecimate(hybrid=1)
Obviously both of the above IVTC/de-interlace in exactly the same way (output is 23.976fps), which got me wondering, should #8 be doing something else?
I assume #5 applies to 29.97fps video which is a mixture of telecined 23.976 and 29.97 interlaced, whereas #8 might apply to a mixture of 23.976 and 29.97 progressive, although I'm not exactly sure.
Anyway, my question is..... logically what would the difference be between #5 and #8 in terms of the type of video it applies to, ie what's the difference between "Mix of film & interlaced" and "Mix of film & progressive"..... well the interlaced vs progressive part is obvious, but does "film" mean the same thing in both instances..... and is it logical they both should be de-interlaced in the same way?
Cheers.
MeGUI has different de-interlacing "categories", and each lets you choose several different de-interlacing methods accordingly (or it automatically selects one after an analysis). After some recent experimenting and discussing it with one of the MeGUI developers, it appeared MeGUI was adding the wrong de-interlacing to the script for one of those "categories" (#8 below), which has been changed. However I'm still unsure as to whether MeGUI's de-interlacing is correct, but as the current MeGUI developer lives in PAL-Land as I do, neither of us are very expert when it comes to NTSC.
Currently the de-interlacing categories for MeGUI are as follows:
1. "Progressive"
2. "Interlaced"
3. "Film"
4. "M-in-5 Decimation"
5. "Hybrid film/interlaced. Mostly film": Mix of film & interlaced
6. "Hybrid film/interlaced. Mostly interlaced" Mix of film & interlaced
7. "Partially interlaced": Mix of interlaced & progressive
8. "Partially film": Mix of film & progressive
Most of the above is fairly self explanatory and the appropriate de-interlacing methods for each category are what you'd expect. My question involves the distinction between numbers 5 and 8... as to whether there should be one, and if so, what should it be? Currently MeGUI applies exactly the same de-interlacing for both categories, which to my way of thinking either makes one of them redundant, or #8 is possibly still wrong.
This is an example of what MeGUI currently adds to the script.
5. "Hybrid film/interlaced. Mostly film": Mix of film & interlaced:
tfm(order=-1).tdecimate(hybrid=1)
8. "Partially film": Mix of film & progressive:
tfm(order=-1).tdecimate(hybrid=1)
Obviously both of the above IVTC/de-interlace in exactly the same way (output is 23.976fps), which got me wondering, should #8 be doing something else?
I assume #5 applies to 29.97fps video which is a mixture of telecined 23.976 and 29.97 interlaced, whereas #8 might apply to a mixture of 23.976 and 29.97 progressive, although I'm not exactly sure.
Anyway, my question is..... logically what would the difference be between #5 and #8 in terms of the type of video it applies to, ie what's the difference between "Mix of film & interlaced" and "Mix of film & progressive"..... well the interlaced vs progressive part is obvious, but does "film" mean the same thing in both instances..... and is it logical they both should be de-interlaced in the same way?
Cheers.
