Why does NERO only gives you 1 hour for a DVD instead of 2?

[the_importer]

On every blank DVD disks that I have, it says 2 hours of play, but when trying to get the best resolution with NERO, it only gives me 1 hour. If I try to add more content, it says that the quality will degrade.

Any way around this, or should I just change program? If I should change programs, what would you recommend (that's not too expensive).

[Richard_G]

At best quality full frame DVD compliance, one hour will fill a DVDR disc. Anything over an hour will degrade, it is up to you to decide if the level of degradation is acceptable. Most people find that the degradation isn't unacceptable until you go beyond 2 hours on a disc which is why disc manufacturers put 2 hours on the packaging. It means absolutely nothing but it looks good.

[the_importer]

At best quality full frame DVD compliance, one hour will fill a DVDR disc. Anything over an hour will degrade, it is up to you to decide if the level of degradation is acceptable. Most people find that the degradation isn't unacceptable until you go beyond 2 hours on a disc which is why disc manufacturers put 2 hours on the packaging. It means absolutely nothing but it looks good.

So basically, NERO is making worry for nothing, I mean if every programs are the same, then it's ok.

One quick question, speaking of degraded; I've backed up my DVD movies using a program called DVD X Copy because my originals were starting to have noticeable scratches.

If a movie is almost 2 hours, then it had to have been degraded to fit on the blank disk, right? But Besides the fact that there’s no menus and that I only got one language per disk, I do not see any degradation.

So what’s up with that?

[MOVIEGEEK]

Time on a DVD depends on bitrate,if the video doesn't have alot of motion you can go as low as 4,000kbps@352x480.You can also use MPEG/AC3 audio and reduce the audio bitrate so you can use a higher video bitrate.
The one hour setting is at the max video bitrate(~9,000kbps) and PCM audio,the best way is to experiment with a DVD/RW.

[the_importer]

Time on a DVD depends on bitrate,if the video doesn't have alot of motion you can go as low as 4,000kbps@352x480.You can also use MPEG/AC3 audio and reduce the audio bitrate so you can use a higher video bitrate.
The one hour setting is at the max video bitrate(~9,000kbps) and PCM audio,the best way is to experiment with a DVD/RW.

???

I thought DVDs were like CDs, once converter to TIME, quality didn't matter. An MP3 at 192 bit rate would take the same amount of minutes on a CD as an MP3 at 360 bit rate. Doesn't the same rule appeal to a DVD?

[MOVIEGEEK]

Audio CD's convert any source bitrate to WAV,so time of play=size on disc.If you make an MP3 CD then bitrate=size on disc.
With DVD-Video:bitrate=size on disc.

[kschang]

What movieGeek is saying is... The DVD standard is a bit LAXER than the CD standard. CD Standard is 16-bit PCM. That's it.

DVD is quite a bit more flexible, and thus, even though standard is fixed at MPEG2, the bitrate of the MPEG2 CAN vary, and thus, size physical size of the file can vary, even though the play time stays the same. Further monkey wrench to throw in... different types of audio.

So to answer your question, no, the rule does NOT apply to DVD. The bitrate for DVD compliant MPEG is variable, not fixed like CD Audio.

[the_importer]

Thank you, I'll try to give it a go.