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Lost S06E08 720p HDTV X264-DIMENSION

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🏠 Forum » Episodes » Lost S06E08 720p HDTV X264-DIMENSION
Posted at 17/03/2010, 11:51
#130289
audio is terrible on this.. not out of sync, just way too bassy.. it overpowers the ambient sounds
and it's hard to distinguish voices

and the video isn't great either, far more blurry than usual
Posted at 17/03/2010, 13:26
#130290
i have always seen issues with pretty much all the lost mkv files. for some reason it looks as
thought the pulldown on the encoding isn't working properly. you will see the image stutter, which
is especially noticeable on panning shots.

i'm not sure if this is something to do with the broadcast, the encoding process or the person doing
the encoding. i know this will be ripped from broadcasts in the us, but other broadcast from the us
(such as 24) are perfect. again this maybe that 24 is broadcast on fox hd, whilst lost is on abc hd.

anyone have any clues on this, i would be grateful to understand why this happening and can it be
overcome?
Posted at 17/03/2010, 13:58
#130296
this one's ripped from ctv (canada, isn't it?).

video quality pretty much sucks... too much contrast, blended colours and much compression-artifacts ☹️
Posted at 17/03/2010, 16:31
#130309
+1, the video quality of this file is not much better than an sd .avi file. hopefully next weeks
will be back to normal.

as for the above comment regarding stuttering, its because the broadcast is at 23.9fps compared to
the normal 25fps. not sure why abc have done this?
Posted at 17/03/2010, 17:49
#130314
actually, the ntsc hd broadcast with be 1080i/60hz, or possibly 720p/60hz. the frame rate is
actually set at 29.97 fps. to achieve this for a film originally shot at 24fps, they use a process
called 3:2 pulldown (also known as telecine). there is also a slight slow down in the original
footage that make is 23.976fps.

however, when the rip is made the encoding process should reverse this 3:2 pulldown and so get back
to the original 24fps (well actually 23.976fps).

it doesn't actually matter that i'm in a pal country watching my tv at 50hz (25fps). my pc has a
refresh rate of 60hz as standard for most lcd, and if i feed my flat panel using vga, the pc will
essentially sees the tv as a monitor and sets the refresh at 60hz. btw, my tv supports both pal and
ntsc formats + 24fps. still, there is judder evident on every lost mkv i have seen.

i believe that this is down the the encoding process, and either the person or the program encoding
the rip not applying the reverse telecine correctly. if you actually move frame by frame through an
episode of lost during a pan you will see the frame jump.

this can be done correctly - just look at the mkvs of 24.
Posted at 17/03/2010, 18:02
#130317
of course, if fox broadcast in 720p and abc in 1080i, this might also be the root of the problem.

it is relatively simple to reconstruct the original frames from a progressive broadcast - as all the
frames as broadcast in their entirety for each field.

however, in 1080i, the frame is interlaced, so 2 out of 5 fields are actually a composite of the two
frames. reversing this can be tricky, but can be done i believe.

it all get a bit complicated,
Posted at 18/03/2010, 05:11
#130352
good explanations lads, well worth reading ^^^
Posted at 18/03/2010, 13:16
#130373
interesting. thanks for the update.
Posted at 23/03/2010, 04:15
#130675
fwi, after viewing this episode i actually thought that the sound and colours were fine when viewed
on my 42" plasma. this is by far been the most stable rip of the season so far - lovely motion and
not a hint of telecine judder.
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