I burned 10 min of DVD on CD-R disc, but won't play

[gb14820]

I burned 10 mins. of DVD on a CD-R disc (Sony brand). It will not play on my Sony DVP NS 700P standalone player, even though it will play in my computer using PowerDVD. I figured I would save some money by burning the DVD content on a CD-R. I used Sonic DVDit to do the burning, and they say that this type of procedure should work.

Is there something I should do in the burning stage to make it compatible with the Sony standalone player?

Thanks.

[Doppelgofer]

this won't work because burning to a normal CD-R is known as cDVD or Mini-DVD and cannot be played on most conventional dvd players.....they spin at different speeds with different media.....dvd is a lot higher a bitrate than what cd media uses.......maybe i'm speaking complete shit but i hope i helped

[Arky]

No, Doppelgofer, you are not "speaking complete shit" - you are absolutely correct

Because data is physically written more densely on a DVD disk, it does not have to spin very fast in order for the laser to read the pits and lands of the data on the disk. A CDR, however, stores the data less densely, so if you had data with the same bitrate of a DVD, but written to a CDR, the disk would have to be spun incredibly quickly to pass enough pits and lands (data) past the laser for the high-bitrate stream to playback correctly, if at all. This is precisely the reason why VCD and SVCD have limited bitrates - it';s actually far more about rotational velocity than it is about capacity. Otherwise, there would be nothing stopping you (if you wanted to) from creating a 2hr film that spanned ten CDRs due to it's high bitrate. Because of the rotational velocity issue, however, this is impossible, even if you wanted to. I wouldn't mind betting that you might just be able to playback that CDR, gb14820, if you played it back on a PC with a 52x CDR drive, but even then you might be pushing your luck.

Solution?: Either write to a DVD-R or re-encode to a lower bitrate and write it again to CDR. If you must write to CDR, then your best option (assuming you want to play back your finished project on a standalone) is SVCD.


Arky ;o)

[sterno]

Another important issue for cDVD/MiniDVD is that the DVD player knows what kind of media you put in it. Often they will not look for a DVD structure on a CD, so even if the video is encoded at a lower bitrate it won't necessarily work in a standalone player.

[Kdiddy]

A CDR, however, stores the data less densely, so if you had data with the same bitrate of a DVD, but written to a CDR, the disk would have to be spun incredibly quickly to pass enough pits and lands (data) past the laser for the high-bitrate stream to playback correctly, if at all. This is precisely the reason why VCD and SVCD have limited bitrates - it';s actually far more about rotational velocity than it is about capacity.

Most of the time, this is NOT the issue with the inability of players to play miniDVD/cDVD material. but as the reason sterno stated..

Another important issue for cDVD/MiniDVD is that the DVD player knows what kind of media you put in it. Often they will not look for a DVD structure on a CD,

Most standalones are completely capable of spinning a CDR at the proper speed needed. Even if they could not, one could lower the bitrate to SVCD/VCD levels. However, since the main problem is the firmware's media recognition, the players wont even attempt to play the disk at all because it expects DVD author material to be on DVD media and not CDR/RW media.

[vitualis]

To read "DVD style" material at full DVD 1x bitrates on a CD, it only nees to to be spun and read at about 10x CD -- perfectly capable on many DVD drives.

The "real" reason as as been stated above -- firmware. Most DVD players don't look for DVD material if it detects a CD. Thus, it won't have a ghost of a chance playing miniDVD.

Regards.

[Arky]

As I recall, many buyers of the Afreey discovered that a DVD-ROM drive upgrade was necessary to spin their cDVD disks fast enough? i never bought an Afreey myself so I cannot confirm this 100%. However, I can tell you that my Limit DVD player can play SVCDs, VCDs, CDs, MP3s - you name it - but it is still unable to play DVD content from CDR (by which i mean full D-1 MPEG2 bitrate content authored in Maestro. Nevetheless, it does not seem to mind if I do the same but with a lower bitrate). Furthermore, my old laptop, which had an external 20x CD-Rom drive, was unable to playback high bitrate MPEG from CDR, but was quite happy with lower bitrate projects (i.e. 3,000kbps or lower), playing them back without a hitch.

When you talk about only needing to spin the disk "10x faster", this does not appear to take into account the fact that disk velocity veries depending on where on the disk the data lies - the closer to the center the faster the disk must be spun to cope with the read-rate. Thus, material recorded nearer the centre may require rotational speeds far in excess of "10x".

please don't misunderstand me - I'm not being confrontational or argumentative - I'm simply saying that I don't think it's always a case of media incompatibility - even though you may well have hit the nail on the head with regard to the Sony (with regard to not liking Video_TS folders on CDR media), I would not (generally) expect any player to enjoy playing back full DVD bitrate material from CDR media - it's a tough task IMHO.

Arky ;o)

[vitualis]

If the player is capable of playing back miniDVD, it shouldn't matter what the bitrate is. It will play it. If there is a bitrate limitation, then it will become evident as skips and problematic playback.

A player that is not capable of miniDVD will not load it at all.

The vast majority of DVD players simply do not have the firmware to play miniDVD, regardless of the actual DVD drive mechanism.

As for CD spin, a single spin DVD drive is capable of reading a CD at a speed equivalent to approx. 3 spin CD. This refers to the whole disc.

Max. DVD bitrates are equivalent to approx. 10 spin CD.

Thus, a simple single spin DVD drive will not be able to read a CD fast enough if you put high bitrate material on the disc (as was the case with the Afreey based units).

However, many DVD drives are designed to "spin up" when they detect a CD to improve CD reading performance. This is a side-benefit of having DVD-ROM drives on the PC. We simple expect our CDs to be read faster than 3x nowadays! As such, most DVD drives that do spin up for CDs (essentially all DVD-ROM drives but a lesser proportion of drives in stand-alone units) have absolutely no problems reading the CD at a sufficient speed for material at DVD bitrates (which you remember is at approx. 10x CD).

As for the "spin" terms, they refer to the max. data rate, not necessarily the actual angular velocity of the disc. Thus, 10x CD data rate simply means that if the drive can spin and read the CD 10x faster than 1x at the centre of the disc.

Regards.