I want to highlight some paragraphs with reference to the manual section "DVD and Bluray Creation"
https://cinelerra-gg.org/download/CinelerraGG_Manual/DVD_Bluray_Creation.html

However there is a serious issue with interaction between the Operating System and bdwrite when creating a BD/blu-ray that requires automount to be turned off. Refer to the details and more specific explanations below the following steps for how to do this.

Blu-ray Workaround for Mount/Umount
https://cinelerra-gg.org/download/CinelerraGG_Manual/Blu_ray_Workaround_Mount_Um.html

--------------

The max disk space needed is a little over 100GB for 50GB Double Layer (DL) media or 50GB for a single layer BD blu-ray. A standard SD of 4.7GB needs about 10GB disk space. You probably can get by with much less if the render for blu-ray is less than 25 hours of media. You will need twice as much disk space as the media holds to ensure you have sufficient space for working and copying.

For blu-ray, the filesystem generation is slightly harder. First, it creates an empty filesystem image <target>/bd.udfs using mkudffs which makes a big hole for the filesystem data. The hole is made just a little bigger than the data written by bdwrite so that you don't have to write an entire 25GB or 50GB disc even if no data exists. This empty filesystem is loopback mounted to make it writable, and the linux kernel manages the filesystem image. The bdwrite program applies the blu-ray structure to the UDF filesystem by creating the needed BDMV blu-ray filesystem, which the kernel stores onto the image file bd.udfs. When udfs is unmounted, the kernel finalizes the disk image on bd.udfs. The bd.udfs image can be written directly to a blu-ray disk via dd or growisofs.


I've used test files much smaller than the 50GB capacity BD-RE DL disc.
Cin-GG uses /tmp as default for BD rendering, where I have 27G available space before rendering:

df -h /tmp
Filesystem      Size  Used Avail Use% Mounted on
/dev/nvme0n1p3   40G   11G   27G  30% /

---------------


Be aware that the CINELERRA-GG program will be totally shutdown AFTER the batch jobs finish. Screenshot below shows BD blu-ray creation with 2 batch jobs queued up and ready to go.


https://cinelerra-gg.org/download/CinelerraGG_Manual/DVD_Bluray_Creation.html#SECTION0016001000000000000000

Blu-ray Media

For rewritable blu-ray (recommended) (BD-RE):

Note: unwritten (virgin) media must be formatted first using
* This info is missing within step 9 in the beginning of this chapter (equivalent to K3b quick format)

dvd+rw-format /dev/bd   #only done once and does not take very long

To write or rewrite rewritable blu-ray media:

cd /TargetDirectory/bd_20150820-093747/
dd if=./bd.udfs of=/dev/bd bs=2048000    #the growisofs command below also works

 To write blu-ray write-once media: (BD-R) (no pre-formatting needed):

cd /TargetDirectory/bd_20150820-093747/
growisofs -dvd-compat -Z /dev/bd=./bd.udfs

========================================
Den 21.12.2021 16:13, skrev Andrew Randrianasulu:
 I think bdwrite segfaults now ( (

not sure why, I try to revert some changes (tried to add variable chapter marks along the way) and see if it improves situation... 

On Tuesday, December 21, 2021, Terje J. Hanssen <terjejhanssen@gmail.com> wrote:

Den 21.12.2021 13:14, skrev Terje J. Hanssen:
[...........]
After so much confusing and fail-sensitivety with udfs on hdd:
My Tip/suggestion:
Wouldn't it be an idea to have an option to write a BD.iso instead (with udf included) just as tsMuxer can do? At least for a simple file like this, K3b gui handle a BD.iso quite easy and straight forward by selecting the iso-file and "Burn the (CD)image to disc".

===========================================

Did a test verification with K3b. Had to quick-format the BD-RE disc and then K3b burned the previous txMuxer generated SD-BD.iso image to a BD-compliant disc that played fine with VLC and autoplayed in Samsung UBD player as Blu-ray.
----------------
Now, yet a new test as root to BD render with Cin-GG and dd to the formatted BD-RE disc.
./cin_bluray_lpcm_test_9e730376d01dcf86b3420de8f3625cec.AppImage
/usr/bin/AppImageLauncher: /usr/lib64/libcurl.so.4: no version information available (required by /usr/bin/../lib/x86_64-linux-gnu/appimagelauncher/libappimageupdate.so)
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
qt5ct: using qt5ct plugin
Failed to connect to bus: $DBUS_SESSION_BUS_ADDRESS and $XDG_RUNTIME_DIR not defined (consider using --machine=<user>@.host --user to connect to bus of other user)
Failed to connect to bus: $DBUS_SESSION_BUS_ADDRESS and $XDG_RUNTIME_DIR not defined (consider using --machine=<user>@.host --user to connect to bus of other user)
Cinelerra Infinity - built: Dec 20 2021 14:52:15
git://git.cinelerra-gg.org/goodguy/cinelerra.git
(c) 2006-2019 Heroine Virtual Ltd. by Adam Williams
2007-2020 mods for Cinelerra-GG by W.P.Morrow aka goodguy
Cinelerra is free software, covered by the GNU General Public License,
and you are welcome to change it and/or distribute copies of it under
certain conditions. There is absolutely no warranty for Cinelerra.
Render::render_single: Session finished.
** rendered 3415 frames in 38.119 secs, 89.588 fps
++ dirname /tmp/bd_20211221-143520/bd.sh
+ sdir=/tmp/bd_20211221-143520
++ cd /tmp/bd_20211221-143520
++ pwd
+ dir=/tmp/bd_20211221-143520
+ PATH=/sbin:/usr/sbin:/usr/local/sbin:/root/bin:/usr/local/bin:/usr/bin:/bin:/tmp/.mount_cin_blJgBTQy/usr/bin
+ mkdir -p /tmp/bd_20211221-143520/udfs
++ du -cb /tmp/bd_20211221-143520/bd.m2ts
++ tail -1
++ sed -e 's/[     ].*//'
+ sz=211070976
+ blks=107158
+ rm -f /tmp/bd_20211221-143520/bd.udfs
+ mkudffs -b 2048 /tmp/bd_20211221-143520/bd.udfs 107158
filename=/tmp/bd_20211221-143520/bd.udfs
label=LinuxUDF
uuid=61c1d85eb5d3ee36
blocksize=2048
blocks=107158
udfrev=201
start=0, blocks=16, type=RESERVED
start=16, blocks=3, type=VRS
start=19, blocks=237, type=USPACE
start=256, blocks=1, type=ANCHOR
start=257, blocks=16, type=PVDS
start=273, blocks=1, type=LVID
start=274, blocks=106627, type=PSPACE
start=106901, blocks=1, type=ANCHOR
start=106902, blocks=239, type=USPACE
start=107141, blocks=16, type=RVDS
start=107157, blocks=1, type=ANCHOR
+ mount -t udf -o loop /tmp/bd_20211221-143520/bd.udfs /tmp/bd_20211221-143520/udfs
+ bdwrite /tmp/bd_20211221-143520/udfs /tmp/bd_20211221-143520/bd.m2ts
/tmp/bd_20211221-143520/bd.sh: line 11:  7630 Segmentation fault      (core dumped) bdwrite $dir/udfs $dir/bd.m2ts*
-------------------------
localhost:/tmp # du -sh bd_20211221-143520/
202M    bd_20211221-143520/
localhost:/tmp #
localhost:/tmp # tree -sh bd_20211221-143520/
bd_20211221-143520/
├── [2.0K]  bd.jobs
├── [201M]  bd.m2ts
├── [ 525]  bd.sh
├── [209M]  bd.udfs
├── [5.9K]  bd.xml
└── [ 136]  udfs
    ├── [ 412]  BDMV
    │   ├── [  40]  AUXDATA
    │   ├── [ 224]  BACKUP
    │   │   ├── [  40]  BDJO
    │   │   ├── [  40]  CLIPINF
    │   │   ├── [  40]  JAR
    │   │   └── [  40]  PLAYLIST
    │   ├── [  40]  BDJO
    │   ├── [  40]  CLIPINF
    │   ├── [  40]  JAR
    │   ├── [  40]  META
    │   ├── [  40]  PLAYLIST
    │   └── [  40]  STREAM
    └── [ 272]  CERTIFICATE
        ├── [ 224]  BACKUP
        │   ├── [  40]  BDJO
        │   ├── [  40]  CLIPINF
        │   ├── [  40]  JAR
        │   └── [  40]  PLAYLIST
        ├── [  40]  BDJO
        ├── [  40]  CLIPINF
        ├── [  40]  JAR
        └── [  40]  PLAYLIST
24 directories, 5 files
localhost:/tmp # cd bd_20211221-143520/
=============================================================================
Write to disc
localhost:/tmp/bd_20211221-143520 # dd if=./bd.udfs of=/dev/sr0 bs=2048000
107+1 records in
107+1 records out
219459584 bytes (219 MB, 209 MiB) copied, 0.0823011 s, 2.7 GB/s
* Had to wait quite some time after the command finished before the disc writing started and finished !!
===================================================================================================
localhost:/tmp/bd_20211221-143520 # df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        4.0M     0  4.0M   0% /dev
tmpfs            32G  960K   32G   1% /dev/shm
tmpfs            13G   27M   13G   1% /run
tmpfs           4.0M     0  4.0M   0% /sys/fs/cgroup
/dev/nvme0n1p3   40G   12G   26G  31% /
/dev/nvme0n1p1  156M  6.1M  150M   4% /boot/efi
/dev/nvme0n1p4  427G   97G  309G  24% /home
/dev/sdb1       459G  421G   15G  97% /video
/dev/sdc1       384G  145G  220G  40% /data
tmpfs           6.3G  180K  6.3G   1% /run/user/1000
/dev/sdd1       3.6T  2.3T  1.2T  67% /run/media/terje/Seagate_4TB_back
/dev/loop0      209M   66K  209M   1% /tmp/bd_20211221-143520/udfs
/dev/sr0        209M   20K  209M   1% /run/media/terje/LinuxUDF
* Had to umount and mount the disc again before it was seen as a "LinuxUDF" disc in FileManager
df -h /dev/sr0
Filesystem      Size  Used Avail Use% Mounted on
/dev/sr0        209M   20K  209M   1% /run/media/terje/LinuxUDF
-------------------
** But the STREAM map is now empty (no 0000.m2ts) and VLC cannot playback video from the disc!
Samsung hardware player read the disc as Datadisk, but browsing to STREAM is emptyf course nothing to playback.
Looks like only the Blu-ray structure has been written to disc without content.
cd /run/media/terje/LinuxUDF
localhost:/run/media/terje/LinuxUDF #
localhost:/run/media/terje/LinuxUDF # tree -sh .
.
├── [ 412]  BDMV
│   ├── [  40]  AUXDATA
│   ├── [ 224]  BACKUP
│   │   ├── [  40]  BDJO
│   │   ├── [  40]  CLIPINF
│   │   ├── [  40]  JAR
│   │   └── [  40]  PLAYLIST
│   ├── [  40]  BDJO
│   ├── [  40]  CLIPINF
│   ├── [  40]  JAR
│   ├── [  40]  META
│   ├── [  40]  PLAYLIST
│   └── [  40]  STREAM
└── [ 272]  CERTIFICATE
    ├── [ 224]  BACKUP
    │   ├── [  40]  BDJO
    │   ├── [  40]  CLIPINF
    │   ├── [  40]  JAR
    │   └── [  40]  PLAYLIST
    ├── [  40]  BDJO
    ├── [  40]  CLIPINF
    ├── [  40]  JAR
    └── [  40]  PLAYLIST
23 directories, 0 files
========================
Attach output log-files for
udf_test_CGG_dd_BD-RE
udfinfo_CGG_dd_BD-RE
bd_info_CGG_dd_BD-RE
==========================