1080i 25fps to 1080p 23,976fps?

[chompy]

Hi I have a bu-ray (Red Cliff Spanish edition) that is 1080i @25fps (altough the rest of the edition around the world are 1080p @23,976fps) and I want to make a BD-25 backup, and I would like to know if it's best to convert to 23,976fps or leave it interlaced @ 25fps.

I've read some post about IVTC, deinterlace, debob... But I'm completely lost, I'm an absolutely newbie and I don't understand anything... Could anybody please tell what should I do to get 1080p @ 23,976fps from 1080i @ 25fps and if it's worth it?

Here the mediainfo of the original video:

Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Si
Format settings, ReFrames : 4marcos
Codec ID : 27
Duration : 2h 21min.
Bit rate mode : Variable
Bit rate : 24,7Mbps
Maximum bit rate : 32,0Mbps
Width : 1 920pixeles
Height : 1 080pixeles
Display aspect ratio : 16:9
Frame rate : 25,000fps
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8bits
Scan type : MBAFF
Bits/(Pixel*Frame) : 0.477
Stream size : 24,5GIB (94%)
colour_primaries : BT.709-5, BT.1361, IEC 61966-2-4, SMPTE RP177
transfer_characteristics : BT.709-5, BT.1361
matrix_coefficients : BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177


And here's a sample I've done with mkvmergue (I hope I've done it ok, as it's the first time I'm doing this):

http://www.spreadmyfiles.com/files/GHO5143M/00000.mkv

Thanks and greetings

[setarip_old]

Hi!

Do you have a particular NEED to modify your Blu-ray for backup?

Does your commercial Blu-ray disc exhibit some unacceptable behavior?

[chompy]

Hi,

it's as simple as a movie played @25fps looses all its film mood, and then it's just as if you were watching a tv show or your last vacation video camera shots.

Greetings

[kieranrk]

Hi,

it's as simple as a movie played @25fps looses all its film mood, and then it's just as if you were watching a tv show or your last vacation video camera shots.

Greetings

Except it's progressive material encoded as interlaced so it is in film mode.

[chompy]

Except it's progressive material encoded as interlaced so it is in film mode.

Sorry, but due to my newbiness and my not so great English, I don’t understand your statement… I know this film was originally filmed progressively @24fps, but my blu-ray has been encoded interlaced @25fps, and when it’s shown on my plasma, it looses something that I feel (notice, that I’m saying "feel", not "watch", altough you can also see that some images aren't so nicely rendered) on the rest of my blu-rays that are correctly encoded progressively @24fps.

That's why I wanted to know what’s the best way (if there’s any) to recover the original 1080p24 from this 1080i25.

Greetings

[GodofaGap]

Sorry, but due to my newbiness and my not so great English, I don’t understand your statement…
The video you posted is progressive, it's just encoded in interlaced mode (I don't think 25p encoding is allowed for Bluray and therefor 25i was used). There are no interlaced frames in there!


That's why I wanted to know what’s the best way (if there’s any) to recover the original 1080p24 from this 1080i25.
All you would need to do is a slowdown to 24p, but this opens a whole new can of worms for the perfectionist because you also need to slow down the audio then. This means re-encoding it and I don't know if there are free Bluray compatible lossless encoders available, so you'd probably have to settle for high bitrate AC3. What's more, the perfectionist would also need to figure out if the audio was sped up with or without pitch correction.

In the end I think you make it yourself a lot easier if you go by what you see, and not by what you know from the box or MediaInfo ;).

[chompy]

Thanks, now I clearly understand kieranrk post.

Don’t worry about HD audio, our “magnificent” Spanish edition only has DD5.1 @448Kbps audio streams, so I think slowing it down using eac3to @640Kbps won’t hurt much more.

One more thing, which tools have you used to know that its frames are progressive and not interlaced?

Greetings

[GodofaGap]

One more thing, which tools have you used to know that its frames are progressive and not interlaced?
A software (avisynth+virtualdub) that doesn't automatically deinterlace and my eyes.

[chompy]

A software (avisynth+virtualdub) that doesn't automatically deinterlace and my eyes.

Ok, lots of thanks again