Does anyone know if video playback performance on DVD-ROM media is any better than playback on CD-ROM media? I was just wondering if a DVD-ROM will perform better than a CD-ROM when playing back MPEG-4 video from the disc.
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Last edited by Judson; 5th Apr 2012 at 09:35.
While the spin rate is comparable for CD, DVD and BD, the actual off-the-disc transfer rate is very different. DVD is 3x to 11x the transfer rate of CD. BD is above even that.
So, regardless of "Authoring Format", a "FILE" copied from disc to HardDrive goes much faster on DVD than CD, and faster still on BD. And if that includes "playing" it from a software player, the software can MUCH more easily buffer the higher datarate disc than the lower.
Pretty common experience; this is why, for example, burning DVD-VIDEO data onto CD (aka MiniDVD) or BDMV data onto DVD (aka DVD9/AVCHD/MiniBD) is bound to be a problem unless one has compensated for it by LOWERING the bitrate expected in the streams.
Thanks for the feedback, going to be playing the video in a browser from off the interactive CD/DVD. The build is only 411MB, so it will easily fit on a CD, but if it will perform better on DVD-ROM then I am willing to have wasted space.
Note: This is iPhone .mp4 video files produced by handbrake.
Just burn to CD. I can't give you 100% assurance but it's highly unlikely that the bit rate is high enough to cause a problem on CD media if you recorded it on an iPhone.
I just want the BEST performance playing from disc. Is a DVD-ROM going to deliver better performance is what I am trying to decide.
A CD-R cost's what ?
Try it and see....
Not gonna break the bank on that little test!!
Let take a pretend example:
You've got a video file rated at 4Mbps total (A+V+overhead). If it was created as CBR (constant bitrate) for all streams, it needs to have steady, continuous read rate off the disc in question of that figure or higher. Becomes a little bit trickier if one or both of the files is encoded VBR.
IF so, let's pretend the MAX/PEAK bitrate for this file is 6Mbps. Well, if the disc can put out CONTINUOUS data rates in excess of this figure, it will stream & decode & play in realtime with NO hiccups, etc (assuming you don't have a bogged down PC to begin with).
If the disc can only Sometimes/Occasionally give you that data rate (or better), it might look ok if you get lucky, but likely you will experience some hiccups/skips in the playback.
IF the disc can NEVER give you that data rate, you WILL get skips/freezes!
(BTW, when I say "disc" I mean the whole disc subsystem/chain)
So if these hypothetical CDs can sustain 5Mbps from that drive, but DVDs can sustain 15Mbps from that drive: you'd be better off with using a DVD.
If both CD and DVD can sustain >6Mbps (remember, this is just an example), then either would be perfectly fine to use.
I was wondering if he meant if he converts it to a CD format or DVD format (who the hell know's what people are talking about when they don't know themselves, rip/convert) which one would be better.
Because as far as i have ever experienced, if it is in a specific format small enough that will fit onto a CD-R, it will be/look the same on either type of disc.
Because I don't know about anyone else but,
And Cornucopia is trying, yet again, to make a newbie's head implode!!!
Aww, come on. Is it that obvious?
H.264 480 x 272
AAC, Stereo 48kHz
Thanks for the input...going with CD-ROM.