1080p vs 720p and what is this fps

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1080p vs 720p and what is this fps

Postby iball » Wed Jul 25, 2012 4:52 pm

Hey guys I am making an AMV (which I am new to) and the source is a 1080p mkv with 23.976fps. Whenever I extract the h264 to turn into an mp4 (so I can use Vegas or Adobe) I feel like the h264 is laggy, even though it is the same fps as the source.

I am seriously considering redownloading the show in 720p rather than using 1080p. I don't think many projectors in small cons are going to take advantage of 1080p so it feels like extra weight.
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Re: 1080p vs 720p and what is this fps

Postby Pwolf » Thu Jul 26, 2012 1:57 pm

What are your computers specs? I would also convert the source to Lossless as this generally puts less strain on the computer's resources.
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Re: 1080p vs 720p and what is this fps

Postby Eake4 » Fri Jul 27, 2012 8:38 am

The download maybe the original problem and as Pwolf said convert your sources to lossless files to make it faster to process aswell as keeping the quality. Also instead of getting the show in 720p again you could just resize the file dimensions down from 1080p to 720p in Avisynth or even in the program you are using. For example After Effects while editing allows scaling which resizes the original source.
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Re: 1080p vs 720p and what is this fps

Postby iball » Fri Jul 27, 2012 3:52 pm

My rig is an i5 2500k, a gtx 580, and 8GB of Ram.

I don't know if you need more than that. But yeah its pretty powerful. Would converting the files i have right now into lossless making it less laggy?
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Re: 1080p vs 720p and what is this fps

Postby Pwolf » Fri Jul 27, 2012 3:57 pm

Would be worth testing at least.
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Re: 1080p vs 720p and what is this fps

Postby iball » Fri Jul 27, 2012 4:15 pm

Recommend a program and format that is lossless? I am new to all this.
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Re: 1080p vs 720p and what is this fps

Postby Pwolf » Fri Jul 27, 2012 4:19 pm

Use Avisynth to frame-serve your source into VirtualDub. export to UTVideo. http://www.animemusicvideos.org/guides/avtech31/
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Re: 1080p vs 720p and what is this fps

Postby Eake4 » Fri Jul 27, 2012 6:52 pm

I use Lagarith but UTvideo works fine too
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Re: 1080p vs 720p and what is this fps

Postby Pwolf » Fri Jul 27, 2012 7:04 pm

Eake4 wrote:I use Lagarith but UTvideo works fine too


Lagarith has better compression in some cases but requires a lot more system resources.
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Re: 1080p vs 720p and what is this fps

Postby Mister Hatt » Sun Aug 05, 2012 2:50 am

Lagarith has better compression in ALL cases, it has a significantly more complicated compression scheme and 3 or so levels of losslessness compared to a very simple scheme that UTV uses. Of course compressibility depends more on the prediction models but Lagarith and UTV use the same models at the moment.
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Re: 1080p vs 720p and what is this fps

Postby Ryvannis » Sat Aug 11, 2012 5:52 am

I'm a bit confused here. MKV is a container. So under my assumption, wouldn't H264 be a video stream contained with MP4 at the lossless level? My concern here is that I'm running into somewhat of a similar situation with Blu-Ray rips. I figured a 2 pass rip conversion net me something of lossless quality if the bit rate is high enough?
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Re: 1080p vs 720p and what is this fps

Postby Ryvannis » Sat Aug 11, 2012 5:58 am

Would net me something of lossless quality. Correction on my part.
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Re: 1080p vs 720p and what is this fps

Postby Mister Hatt » Sat Sep 29, 2012 11:57 am

Ryvannis wrote:I'm a bit confused here. MKV is a container. So under my assumption, wouldn't H264 be a video stream contained with MP4 at the lossless level? My concern here is that I'm running into somewhat of a similar situation with Blu-Ray rips. I figured a 2 pass rip conversion net me something of lossless quality if the bit rate is high enough?

The OP isn't talking about remuxing, just re-encoding. As to your question, a 2 pass encode will always be lossy unless you do it lossless, in which case why bother with 2 pass at all? To get lossy codec bitrate high enough to be almost identical, the filesize is larger than just doing it losslessly in the first place.
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