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High Definition Club - HDTV, Blu-Ray, HD DVD & HD-Audio - Torrent |
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beetrix 1 month ago |
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End MKV Bitrate Overkill Now!! A Pirate Service Announcement
If you were going to watch a Standard Definition (SD) XviD or DivX DVD rip of your favorite movie, then what filesize would you expect for flawless quality? 700 MB is acceptable to most people, and 1.5 GB would probably be more than enough. Most High Definition movies (HD) are ripped for "backup" purposes at HD-720, which has (up to) 2.67 times the number of pixels as an anamorphic DVD. Therefore if a 2-hour XviD from DVD looks great at 1.5 GB, then the same movie in Blu-Ray ripped at HD-720 should have a filesize no greater than 4 GB for the same outstanding result in quality. In fact, if an HD movie has a very wide aspect ratio, such as 2.39 to 1, then an even lower filesize should be used because there are fewer pixels to encode (this is because HD formats are NOT anamorphic). The bottom line is that HD-720 rips at 6 and even 8 GB are simply extreme overkill; it‘s like ripping an mp3 at 640 kilobits per second, when perfect transparency is achieved at a much lower bitrate. These are filesizes needed for an HD-1080 encode, not an HD-720. Once you downsize the image from HD-1080 to HD-720, you reduce the pixel count resulting in a picture with less than half the number of pixels of the original, and there is a significant loss in detail for which no extra bitrate will ever compensate. Basically, the fellow who leaves the filesize at a whopping 8 GB, yet reduces the screen size down to HD-720 does not understand what he is doing. Please do everyone a favor and keep the HD-720 rips to a reasonable bitrate / filesize. The bitrates below are all based on the rule of video transparency being achieved with a 120 minute standard DVD resulting in a 1.5 GB XviD / DivX file. These bitrates will provide high quality for any length movie, provided the video is encoded in a VBR, two-pass mode using a modern MPEG-4 codec (H.264 preferred). To check the Aspect Ratio (AR) of a movie in order to determine necessary bitrate, just look it in up on Amazon or IMDB. BITRATES FOR GENERAL TRANSPARENCY: DVD (Anamorphic): 1748 avg Kbit/s (1.5 GB - 120 min) Encoding to HD-720: 2.39 AR: 3469 avg Kbit/s (2.98 GB - 120 min) 2.35 AR: 3521 avg Kbit/s (3.02 GB - 120 min) 1.85 AR: 4505 avg Kbit/s (3.87 GB - 120 min) 1.78 AR: 4660 avg Kbit/s (4 GB - 120 min) Encoding to HD-1080: 2.39 AR: 7767 avg Kbit/s (6.77 GB - 120 min) 2.35 AR: 7923 avg Kbit/s (6.80 GB - 120 min) 1.85 AR: 10097 avg Kbit/s (8.67 GB - 120 min) 1.78 AR: 10486 avg Kbit/s (9 GB - 120 min) Regarding audio, it is popular to just keep the 5.1 channel AC3; however, great results (with significant reduction in audio filesize) can be achieved by converting to 5.1 channel AAC-HE at a quality setting of 0.25. While AAC-HE can often provide perceived transparency for music, this is not always the case for certain material, e.g., songs ranging from Metallica‘s ‘Master of Puppets‘ to Conjure One‘s ‘Tears from the Moon‘ have obvious artifacts. But because of the less complex nature (per channel) of movie soundtracks in 5.1 channel, AAC-HE is generally ideal for movies and will result in very high perceived audio quality. |
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| 1 file in torrent: | ||
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| 01. Transporter.3.2008.720p.BluRay.Rus.2xEng.HDCLUB.mkv [8107MB] | ||
