[mythtv-users] MythArchive won't write to my DL DVD
J.Pilk at tesco.net
Tue Jan 16 09:55:31 UTC 2007
Kevin J. Cummings wrote:
> John Pilkington wrote:
>> Kevin J. Cummings wrote:
>>>> :-( /dev/dvd: 4173824 blocks are free, 4391419 to be written!
>>>> :-( write failed: No space left on device
>>> Obviously mytharchive is trying to write too much information to my DVD.
>>> Shouldn't this have been caught during the "Create DVD" setup screens
>>> when I selected my videos?
>> This looks like the problem I had with the DVD iso image being too big.
>> I posted around 22 Dec on the user and (later) the dev list.
>>>> I think the problem arises because mythburn aims to create an image that
>>>>> fills the physical storage capacity of the dvd, making no allowance for
>>>>> formatting overheads. The Mytharchive menu quotes available capacity as
>>>>> 4.38 Gb, disk capacity as 4482 Mb; in the version that I have (FC5
>>>>> atrpms) mythburn uses the latter. It's an easy edit - does anyone have
>>>>> a definitive value?
>>> After several trials I got an image that K3b wrote successfully when the
>>> initial value of dvdrsize in mythburn.py was changed from 4482 to 4330.
>>> K3b reported the size of the written image as 4487 Mb, still apparently
>>> 5Mb above threshhold.
>>> Mythburn uses a guesstimate (?) of 1.05 for the factor by which
>>> multiplexing will increase the size of the video component, so YMMV.
> Interesting. I've not (yet) had a problem with single layer DVDs.
> 4,700,000,000 / 1024 / 1024 = 4482.27 MB but
> 8,500,000,000 / 1024 / 1024 = 8106.23 MB
>> I'm now using a dvdrsize of 4300 in >
>> /usr/share/mythtv/mytharchive/scripts/mythburn.py (ATrpms fc5)
>> and get writable images.
>>> #Single and dual layer recordable DVD free space in MBytes
> Which differs from the values being used above for DL DVDs.
> Where do these values come from? Should a DL DVD be twice the size of a
> SL DVD? And if so, then why are the disks labeled as 8.5GB and not
> (Inquiring minds want to know!)
> In any event, after cutting out the commercials, the 4 episodes fit fine
> with no re-encoding on my DL DVD. And both DVD players in the house are
> playing the MPEG-2 vidoes just fine.
> I'm going to try again tomorrow after tonight's next 4 episodes. B^)
The value of 4320 for a single-layer DVD was the first that I tried (in
a decreasing sequence) that gave an image recordable by K3b with one
particular set of recordings (and Myth version). The reported image
size still looked marginal, so I reduced it a bit more; perhaps it's a
bit pessimistic but I haven't had an oversized image with it and the
DVDs play well in Xine and my stand-alone player.
The internal MythTv player hangs when a DVD track is selected; so does
the 'Play Created DVD' in the Mytharchive menu. (ATrpms bleeding
0.21-149_trunk_r12353.fc5.at at i386)
I have no experience of double layer DVDs. The value in the distro is
twice that for a single layer, so I just doubled my SL value.
More information about the mythtv-users