Home      Over View      Download      Purchase      Support      Contact us
Home > Rm To DVD
Convert Avi to DVD,Divx to DVD,Xvid to DVD,Rm to DVD,Rmvb to DVD,Mov to DVD,Asf to DVD,Wmv To DVD use Wise DVD Creator
What is RM and RMVB
As you know, these two kinds of formats, RM and RMVB, are less than superior in technology side. But as a result of their ubiquitous usage on the internet, these two formats have stayed as, with several other formats, indispensable types in the market. MP4 products at present are alleged to support many kinds of formats through self-enabled decoding ability, but not RM/RMVB, thus largely decreased practicability. In this age of internet ubiquity, RM/RMVB as container of videos have dominated most PCs. To play RM/RMVB videos requires decoding of files by some kind of soft, and adds to the demands for higher quality of chips in a portable video player. For PC, it must has a PIII level of CPU ,in order to support automatic decoding and playing ,while some video players, after some optimizations till now, have been able to support as high quality as QVGA for RMVB decoding. RM (RealMedia) is a digital sound and video file format that is the registered trademark of RealNetworks. This format is typically used to stream media through the net. It can be played with the RealOne player or with other media players using the Real Alternative codec. RealMedia (comprised of RealVideo, RealAudio, and other file formats created by Real) use compression algorithms for eliminating data. Rmvb is an abbreviation for Real Media variable bitrate. It is a type of video file, playable with RealPlayer from RealNetworks.
What is DVD
DVD stands for Digital Versatile/Video Disc, DVDR stands for DVD Recordable and DVDRW for DVD ReWriteable. If you're familiar with regular audio/music CDs or regular DVD-Video discs, then you will know what a recordable DVD looks like. A recordable DVD stores up to 2 hours of very good quality DVD-Video, including several audio tracks in formats like stereo, Dolby Digital or DTS and also advanced menu systems, subtitles and still pictures that can be played by many standalone DVD Players and most computer DVD-ROMs. If you choose to lower the video quality it is possible to store several hours video on a recordable DVD using low bitrates and low resolution with video quality more like VHS, SVHS, SVCD, CVD or VCD. It is also possible to have up to 4.37* GB ordinary data or mix DVD-Video and data on a recordable DVD that can be played by most computer DVD-ROMs.
DVD Sizes
The DVD sizes can be a bit confusing. There are basicly 4 different DVD Sizes
DVD-5 , holds around 4 700 000 000 bytes and that is 4.37 computer GB where 1 kbyte is 1024 bytes* . DVD+R/DVD+RW and DVD-R/DVD-RW supports this format. Also called Single Sided Single Layered. This is the most common DVD Media, often called 4.7 GB Media.
DVD-10 , holds around 9 400 000 000 bytes and that is 8.75 computer GB. DVD+R/DVD+RW and DVD-R/DVD-RW supports this format. Also called Double Sided Single Layered.
DVD-9 , holds around 8 540 000 000 bytes and that is 7.95 computer GB. DVD+R supports this format. Also called Single Sided Dual Layered. This media is called DVD-R9, DVD-R DL, DVD+R9, DVD+R DL or 8.5 GB Media.
DVD-18, holds around 17 080 000 000 bytes and that is 15.9 computer GB. DVD+R supports this format. Also called Double Sided Dual Layered.
* In the computer world is 1 KB data = 1024 bytes so 4 700 000 000 bytes / 1024 = 4 589 843KB / 1024 = 4482MB / 1024 = 4.37GB. See section 3.3 in the DVDDemystified FAQ here. DVD+R/DVD+RW/DVD+R DL and DVD-R/DVD-RW exact sizes DVD-R/DVD-RW = 4 706 074 624 bytes ( 4488 MB ) DVD+R/DVD+RW = 4 700 372 992 bytes ( 4482 MB ) DVD+R DL = 8 547 993 600 bytes ( 8152 MB )
Technical Info for DVD-Video

PAL

Video:
Up to 9.8 Mbps* (9800 kbps*) MPEG2 video
Up to 1.856 Mbps (1856 kbps) MPEG1 video
720 x 576 pixels MPEG2 (Called Full-D1)
704 x 576 pixels MPEG2
352 x 576 pixels MPEG2 (Called Half-D1, same as the CVD Standard)
352 x 288 pixels MPEG2
352 x 288 pixels MPEG1 (Same as the VCD Standard)
25 fps*
16:9 Anamorphic (only supported by 720x576)

Audio:
48000 Hz
32 - 1536 kbps
Up to 8 audio tracks containing Dolby Digital, DTS, PCM(uncompressed audio), MPEG-1 Layer2. One audio track must have MPEG-1, DD or PCM Audio.

Extras:
Motion menus, still pictures, up to 32 selectable subtitles, seamless branching for multiple storylines, 9 camera angles. And also additional DVD-ROM / data files that only can be read by computer DVD drives.

Total:
Total bitrate including video, audio and subs can be max 10.08 Mbps (10080 kbps)


* Mbps = million bits per second
* kbps = thousand bits per second
* fps = frames per second

NTSC (NTSC Film)

Video:
Up to 9.8 Mbps* (9800 kbps*) MPEG2 video
Up to 1.856 Mbps (1856 kbps) MPEG1 video
720 x 480 pixels MPEG2 (Called Full-D1)
704 x 480 pixels MPEG2
352 x 480 pixels MPEG2 (Called Half-D1, same as the CVD Standard)
352 x 240 pixels MPEG2
352 x 240 pixels MPEG1 (Same as the VCD Standard)
29,97 fps*
23,976 fps with 3:2 pulldown = 29,97 playback fps (NTSC Film, this is only supported by MPEG2 video)
16:9 Anamorphic (only supported by 720x480)

Audio:
48000 Hz
32 - 1536 kbps
Up to 8 audio tracks containing DD (Dolby Digital/AC3), DTS, PCM(uncompressed audio), MPEG-1 Layer2. One audio track must have DD or PCM Audio.

Extras:
Motion menus, still pictures, up to 32 selectable subtitles, seamless branching for multiple storylines, 9 camera angles. And also additional DVD-ROM / data files that only can be read by computer DVD drives.

Total:
Total bitrate including video, audio and subs can be max 10.08 Mbps (10080 kbps)


* Mbps = million bits per second
* kbps = thousand bits per second
* fps = frames per second

Video File Comparison

Format
VCD SVCD
DVD HDDVD
HDTV
(WMVHD)
AVI
DivX
XviD
WMV
MOV
Quick-
Time
RM
Real-
Media
AVI
DV
Resolution
NTSC/PAL
352x240
352x288
480x480
480x576
720x480*2
720x576*2
1920x1080*2
1280x720*2
640x480*2 640x480*2 320x240*2 720x480
720x576
Video
Compression
MPEG1 MPEG2 MPEG2, MPEG1 MPEG2
(WMV-
MPEG4)
MPEG4 Sorenson, Cinepak, MPEG4 ... RM DV
Video bitrate 1150kbps ~2000kbps ~5000kbps ~20Mbps
(~8Mbps)
~1000kbps ~1000kbps ~350kbps 25Mbps
Audio
Compression
MP1 MP1 MP1, MP2, AC3, DTS, PCM MP1, MP2, AC3, DTS, PCM MP3, WMA, OGG, AAC, AC3 QDesign Music, MP3 ... RM DV
Audio bitrate 224kbps ~224kbps ~448kbps ~448kbps ~128kbps ~128kbps ~64kbps ~1500kbps
Size/min 10
MB/min
10-20
MB/min
30-70
MB/min
~150MB/min
(~60MB/min)
4-10
MB/min
4-20
MB/min
2-5
MB/min
216MB/min
Min/74min CD 74min 35-60min 10-20min ~4min
(~10min)
60-180min 30-180
min
120-300
min
3min
Hours/DVD N/A N/A 1-2hrs
(2-5hrsa)
~30min
(~1hrs)
7-18hrs 3-18hrs 14-35hrs 20min
Hours/
DualLayerDVD
N/A N/A 2-4hrs
(5-9hrsa)
~55min
(~2hrs)
13-30hrs 6-30hrs 25-65hrs 37min
DVD Player Compatibility Great Good Excellent None Few None None None
Computer CPU Usage Low High Very High Super high Very High High Low High
Quality Good Great* Excellent* Superb* Great* Great* Decent* Excellent
kbps = thousand bits per second
Mbps = million bits per second
*2 approximately resolution, it can be higher or lower
~ approximately bitrate, it can be higher or lower
a DVD with lower video quality, similiar to VCD/SVCD video quality
* the video quality depends on the bitrate and the video resolution, higher bitrate and higher resolution generally means better video quality but bigger file size

Powerful and essential tools for your media, just like VCD SVCD DVD Mpeg DivX Avi IPod PDA and so on.
Copyright © 2000-2007 MakeTimeSoft.Inc. All rights reserved.