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Help Compressing MP4 for Blu Ray Burning

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Hi, I’m a noob that desperately needs some help. This mightbe a somewhat long post, as I’m not sure exactly what information is importantto finding a solution to my problem. Ifanyone can help, I’d greatly appreciate it. Ok, so here goes.
I recently purchased aSamsung blu ray burner and have begun a project in which I’m trying to burn ablu ray disk with some favorite movies on them. These movies are of the Batman Arkham games, and all of the clips weredownloaded from YouTube. The firstmovie, Arkham Asylum, is in HD, was left unedited by me, and is in its originalform as downloaded from YouTube. It is01:59:18 (1 hour, 59 minutes, 18 seconds) in length and is a 2.18 GB file. The second movie, Arkham City, was edited byme to include all of the extraneous scenes. All of the clips were are also HD.
Before I created themovie, the individual clips composing the movie totaled about 17 GB worth ofdata. I mixed the clips and renderedthem using CyberLink Media Suite 10’s PowerDirector 10. The settings I chose were to render the videoin MPEG-4 format, with best quality profile, and using SVRT fast-renderingtechnology. I believe this is theprogram’s default profile type and I didn’t change any of the othersettings. When the movie rendered, it produceda complete movie file weighing in at 06:28:42 in duration and a hefty 35.4GB. The movie retained its HD qualityand looks and sounds beautiful. However,the blu ray disks hold a maximum of 25 GB.
I began researchingways to compress the video and heard that Quick Time Pro could export MP4 intoa file about half the size of the original, so I tried that. On the newer computer that I had used torender the movie, QT continued to freeze at 8%. I researched and learned that QT had some problems with hyperthreadingon newer processors (have no idea what this means). However, I began exporting it on my oldercomp, and it worked. It took 48 hours,but it did export it into a 1.6 GB file. Unfortunately, it had dropped all of the video off the file. I researched this and discovered that QT willdrop video if the original had a resloution incompatible with QT, or if QTdidn’t support the original file’s codec. I tried to export the Arkham Asylum movie, which has the same resolutionas the Arkham City movie, and the same format as the original unrendered movieI had downloaded off of YouTube. Thismovie exported and retained the video and audio, and cut the file size in half,but the video quality was atrocious.
At this point, I needto cut the Arkham City movie size down below 22 GB but don’t want to lose thequality. I believe this can be donebecause the Arkham Asylum movie is the same quality, but is only a 2 GB fileeven though it’s 2 hours in duration. That’s about 1 GB of data for each hour of HD video. By comparison, it seems like I should be ableto get the Arkham City file size well below my 22 GB max without sacrificingquality.
If anyone can tell mewhy I lost video exporting it in QT, and how to preserve the video quality,please do! If not, does anyone knowanother program I can use? Also, doesanyone know why PowerDirector 10 renders such enormous files when the originalclips were only about 17 GB before compiling them together? Finally, I want to create a Blu Ray disk that’sfairly universally compatible with most players (I currently own only PS3s, butwould like it to play in most players), so what video formats are compatible withBlu Ray players (i.e., H.264 AVC, AV, MP4…)? Please help, I really want these movies on bluray, but I’m running out of my own solutions! Thanks!
P.S. Here are thecomplete details for each movie.


ArkhamAsylum

FileType: MP4

Video

VideoType: H.264 AVC

FileSize: 2.18 GB

Duration:01:59:18

Resolution:1920 X 1080

DataRate: 2424 kbps

TotalBitrate: 2616 kbps

FrameRate: 29 frames/second

FrameType: Progressive

AspectRatio: 16:9

Audio

AudioType: AAC

Bitrate:192 kbps

Channels:2

AudioSample Rate: 44 kHz



ArkhamCity

FileType: MP4

Video

VideoType: H.264 AVC

FileSize: 35.4 GB

Duration:06:28:42

Resolution:1920 X 1080

DataRate: 12851 kbps

TotalBitrate: 13048 kbps

FrameRate: 29 frames/second

FrameType: Progressive

AspectRatio: 16:9

Audio

AudioType: AAC

Bitrate:196 kbps

Channels:2

AudioSample Rate: 48 kHz

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