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Please recommend: Blu-ray video 24fps interlaced vs 30fps progressive

post #1 of 9
Thread Starter 
I have AVCHD home video (1080p, 30fps) which I'm going to make a Blu-Ray disc for not loosing video quality. I'm going to use a huge LCD TV supporting 1080p 60fps to watch it. I bought ASUS BW-12B1ST 12X Blu-ray writer for my computer and downloaded CyberLink PowerDirector 10.

When I tried to burn Blu-Ray disc from PowerDirector I found only 2 possible HD options: HD 1024x1080 and HD 1024x1080p. Then I figured out Blu-ray players do support only the following possible FPS for 1080p video Blu-rays can work in: 29.97-i, 25-i, 24-p, or 23.976-p (see http://en.wikipedia.org/wiki/Blu-ray_Disc).

So looks like my best bet is to go either with 24fps progressive or 30fps interlaced. On the one hand I heard progressive video produces more smooth picture, while 30fps is essentially more than 24fps. So please advise which one should I get if I want my video being played as smooth as possible?

Are any Blu-ray players today possible to run 1080p 30fps progressive? 60fps?

Thank you
post #2 of 9
Quote:
Originally Posted by MYV View Post

I have AVCHD home video (1080p, 30fps) which I'm going to make a Blu-Ray disc for not loosing video quality. I'm going to use a huge LCD TV supporting 1080p 60fps to watch it. I bought ASUS BW-12B1ST 12X Blu-ray writer for my computer and downloaded CyberLink PowerDirector 10.

When I tried to burn Blu-Ray disc from PowerDirector I found only 2 possible HD options: HD 1024x1080 and HD 1024x1080p. Then I figured out Blu-ray players do support only the following possible FPS for 1080p video Blu-rays can work in: 29.97-i, 25-i, 24-p, or 23.976-p (see http://en.wikipedia.org/wiki/Blu-ray_Disc).

So looks like my best bet is to go either with 24fps progressive or 30fps interlaced. On the one hand I heard progressive video produces more smooth picture, while 30fps is essentially more than 24fps. So please advise which one should I get if I want my video being played as smooth as possible?

If you have existing video recordings at 1080p30, encoding them at 24 fps would make them less smooth/worse.
Encoding them at 1080/60i on Blu-ray would probably be easiest/best (ie. 29.97i).

Quote:


I found only 2 possible HD options: HD 1024x1080 and HD 1024x1080p

Are you sure the first number (1024) is correct? Standard 1080 line HD Blu-ray resolutions are 1920x1080 or 1440x1080.

Quote:


Are any Blu-ray players today possible to run 1080p 30fps progressive? 60fps?

Most players should be able to de-interlace 60i (29.97i) containing 30p (not interlaced) footage to 1080p30 - they'll output at 1080p60 though.

There are a few players (see this thread: http://www.avsforum.com/avs-vb/showthread.php?t=1276227) that could play 1080p60 video, though it's not a standard Blu-ray format, and it wouldn't really be an advantage for 1080p30 content - you might as well encode it at 1080/60i. There is the possibility that the player could detect the fields wrong with 60i but probably not, and at least you'd know it would play on all players.

Also, 60i (with 30p content) will be smoother than 24p content. 60i with interlaced content should be even smoother (twice as smooth motion as 30p, after being de-interlaced by a player/TV). Though you might occasionally get interlace artefacts. 720p60 is also an option, though lower res.
post #3 of 9
Thread Starter 
Thank you for clarification. I found other Disc creation option in PowerDirector - HD 1920x1080 (24 mbps). Why I might be interested in it? 24 mbps means whole bandwidth (video + audio), right?
post #4 of 9
Quote:
Originally Posted by MYV View Post

Thank you for clarification. I found other Disc creation option in PowerDirector - HD 1920x1080 (24 mbps). Why I might be interested in it? 24 mbps means whole bandwidth (video + audio), right?

If 1920x1080 is the resolution of your original source clips, definitely use 1920x1080 so you don't lose res. If your original clips were lower resolution (eg. 1440x1080) you might get better results sticking to the original clip resolution.

I don't know whether Power Director saying 24 mbps means video+audio. I'd think probably. Blu-ray titles can go up to around 48 mbps, or 60 for 3D. Though 24 mbps could be fine.
post #5 of 9
There are rather a lot of queries and discussions on the internet about AVCHD 30p v. 60i in that at least some 30p is in fact 60i. The AVCHD wiki page lists 29.97 interlaced but not 29.97 progressive as a spec. I'd imagine if a BDP supports AVCHD then it should play at least 30i (or as commonly expressed as 60i) and output as 60p to TV. Why not just try it and see, maybe it just works. I don't see much point converting AVCHD to BD if the aim is to preserve quality.

In case the source is really 30p, it's straight forward to convert it to 60p by frame doubling using avisynth without going through interlacing step. Forget Power Director.
post #6 of 9
Thread Starter 
I asked because my Samsung tm-900 camcoder supports 1080p 60fps recording mode, but I do not see real benefits of it without playback devices supporting it. Looks like it make only sense if you're going to watch your video via high-performence computer with special modern video card and 60fps TV, or save it as a raw footage hoping somewhere in the future video player with 60fps playback standard to be produced. Thank you for answers guys.
post #7 of 9
You lost me there. If you're going to use your HTPC then why bother burning a BD? There are already BDPs with AVCHD 1080p60 support (the thread linked above isn't kept fully updated and I won't provide further info there because the OP chooses to believe some and not others) and that includes my inexpensive Sony BDP from 2010. What are you waiting for?
post #8 of 9
Thread Starter 
I did not say I'm going to use computer to watch it, I just do not have that much hard drive space, and I'm NOT going to buy 1080p 60fps blu-ray players until it become a widespread standard or about to become it coz I need my home video to be played on other devices in my friends and my relatives homes.
post #9 of 9
If the software does what it should.

60P works in 60P and 60i.

60i works in 60P and 60i

24P works in 24P and 60i
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