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Old 25th September 2015, 17:27   #1  |  Link
Lebowsky
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Bluray framerates (in regard to deinterlacing/ivtc)

I was not quite sure where to post this, but avisynth seemed to be the most appropriate subforum since this is mostly about applying ivtc/deinterlacing. If not, sorry, feel free to move it.

I am rather new to bluray and am trying to figure a couple things out. Back then, with dvd, you had PAL at 25fps and NTSC at 23.976/29.90. I've done my share of ripping encoding, and the source material affected the process a lot, especially for concerts and music videos. Natively NTSC-shot material on a PAL disc hat to be deinterlaced, and vice-vera. NTSC-shot material on a NTSC disc could be ivtcd.

Now, since I'm new to bluray, I don't own many discs, but I wanted to check out the ones I had. I pulled a movie (european region 2 of Videodrome), but it is telecined! Is there no more conversion to 25fps for european systems? Or does the home bluray player speed up the movie to 25fps itself? Or is this a one-off case? I Was really expecting it would be a 25fps movie that I'd have to deinterlace. Or am I nuts?
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Old 25th September 2015, 18:05   #2  |  Link
huhn
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the blu ray spec doesn't support 25p.

if your 50i source is telecine just use TFM() and you are done with perfect 25p. there is even a very high chance you can ignore the interlaced flag and treat it as progressive and it will look like perfect fine 25p.

but it would be easier to know your source specs. you can easily sell a 50i BD in the states so technically they don't have to convert NTSC to PAL or things like that anymore. movies are usually 23p even in pal regions.
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Old 25th September 2015, 18:09   #3  |  Link
poisondeathray
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Clarify if you're referring to HD blu-ray or SD, because the rules are slightly different

For HD , "PAL" area BD players support 24.0pN and 23.976pN (the "pN" indicating native progressive)
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Old 25th September 2015, 18:17   #4  |  Link
wonkey_monkey
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There's no longer any need to convert films to 25fps for the European market, because pretty much any European TV will happily display 23.976fps from a Blu-ray player.

The reverse is not as true as it should be, for some reason, so now you sometimes get cheap studios mangling their 25p/50i material to 60i for worldwide release
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Old 25th September 2015, 18:21   #5  |  Link
Lebowsky
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talking about HD, sorry. here are my sources specs (region 2):

Quote:
Format : BDAV
Format/Info : Blu-ray Video
File size : 19.7 GiB
Duration : 1h 27mn
Overall bit rate mode : Variable
Overall bit rate : 32.3 Mbps
Maximum Overall bit rate : 48.0 Mbps

Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : VC-1
Format profile : Advanced@L3
Codec ID : 234
Duration : 1h 27mn
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Quote:
Format/Info : Blu-ray Video
File size : 24.1 GiB
Duration : 2h 6mn
Overall bit rate mode : Variable
Overall bit rate : 3 035 Mbps
Maximum Overall bit rate : 48.0 Mbps

Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Format settings, GOP : M=1, N=12
Codec ID : 27
Duration : 1mn 38s
Bit rate mode : Variable
Maximum bit rate : 26.0 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
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Old 25th September 2015, 18:22   #6  |  Link
Lebowsky
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I missed david's reply. I think that solves it for me

so in the cases above, there's not even a need to do anything. just treat as progressive, correct?

Last edited by Lebowsky; 25th September 2015 at 18:26.
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Old 25th September 2015, 20:34   #7  |  Link
huhn
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yes it is progressive.

not sure where you saw telecine.
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