[Cin] Is UDF 2.5 or higher really required for Blu-ray video and BD burning?

[Terje J. Hanssen]

Den 11.12.2022 16:53, skrev Terje J. Hanssen:
> UDF is told to have replaced ISO for optical CD/DVD/BD discs.
> https://askanydifference.com/difference-between-udf-and-iso-with-table/
>
>
> I wonder if someone can clarify if UDF version 2.5 or higher really is 
> required for creating and burning Blu-ray video to VBD-discs.
>
> I've got this impression earlier, i.e for K3b here, which still seems 
> to be much the case on Linux:
> https://bugs.kde.org/show_bug.cgi?id=257602
>
> I've seen there could be UDF 2.5 on Ubuntu and possibly with tsMuxer(?)
> Bt in my case on Leap 15.4, and even on Tumbleweed, the latest 
> available udf package versions are 2.1 and 2.3:
>
> S  | Name     | Type  | Version         | Arch   | Repository
> ---+----------+-------+-----------------+--------+----------------
> i+ | libudf0  | pakke | 2.1.0-1.27      | x86_64 | Main Repository
> i+ | udftools | pakke | 2.3-lp154.321.3 | x86_64 | 15.4
>
>
> udftools 2.3 is even an experimental package from OBS with content
>
> /usr/bin/udfinfo
> /usr/bin/wrudf
> /usr/lib/udev/rules.d/80-pktsetup.rules
> /usr/sbin/mkfs.udf
> /usr/sbin/mkudffs
> /usr/sbin/pktcdvd-check
> /usr/sbin/pktsetup
> /usr/sbin/udflabel
>
>
> So what happends and decide the udf file system version when using 
> mkudffs, bdwrite and dd or K3b lastly for burning?
> when I let K3b autodect the image (because there are no selection for 
> UDF), it actually shows "ISO 9660" while burning.
> And the result has prooved to be playable Blu-ray discs in hw player.


First, to correct one possibly confusing typo above: VBD-discs should be 
Blu-ray video discs

To add An extract from udfinfo for one of  my burned BD-RE dscs:

udfinfo /dev/sr0 | grep udf
udfinfo: Warning: Device '/dev/sr0' is busy, udfinfo may report bogus 
information
udfinfo: Warning: Second and third Anchor Volume Descriptor Pointer not 
found
udfinfo: Warning: Logical Volume is in inconsistent state
appid=*Linux mkudffs 2.3
udfrev=2.01
udfwriterev=2.01

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