Den 01.12.2021 18:30, skrev Andrew Randrianasulu:

On Tuesday, November 30, 2021, Terje J. Hanssen <terjejhanssen@gmail.com <mailto:terjejhanssen@gmail.com>> wrote:

    Tested the original sample script with minimal changes. A lot of
    buffer underflow messages, but the PCM audio stream was muxed and
    worked in VLC:

    ffmpeg -i dv28.dv -c:v mpeg2video -pix_fmt yuv422p -refs 1 -bf 2
    -b:v 25M -maxrate 25M -minrate 25M -s 720x576 -aspect 4:3 -c:a
    pcm_s16be -f vob dv28.mpg

    [vob @ 0x562322bbb6c0] packet too large, ignoring buffer limits to
    mux it
    [vob @ 0x562322bbb6c0] buffer underflow st=1 bufi=6876 size=7680
    frame= 3416 fps=374 q=2.2 Lsize=  448010kB time=00:02:16.60
    bitrate=26867.5kbits/s speed=  15x
    video:416900kB audio:25620kB subtitle:0kB other streams:0kB global
    headers:0kB muxing overhead: 1.240520%


    ffmpeg -i dv28.mpg  2>&1 >/dev/null | egrep "Video|Audio"
      Stream #0:0[0x1e0]: Video: mpeg2video (4:2:2), yuv422p(tv,
    progressive), 720x576 [SAR 16:15 DAR 4:3], 25000 kb/s, 25 fps, 25
    tbr, 90k tbn, 50 tbc
      Stream #0:1[0xa0]: Audio: pcm_dvd, 48000 Hz, stereo, s16, 1536 kb/s


    mediainfo dv28.mpg | grep Format
    Format            : MPEG-PS
    Format            : MPEG Video
    Format version     : Version 2
    Format profile     : 4:2:2@Main
    Format settings     : BVOP
    Format settings, BVOP                    : Yes
    Format settings, Matrix                  : Default
    Format settings, GOP                     : M=3, N=12
    Format            : PCM
    Format settings     : Big / Signed


there is also -muxrate and -bufsize options..
https://stackoverflow.com/questions/44392689/ffmpeg-vbr-cbr-conversion-and-streaming-of-mpeg-2-ts-video-files <https://stackoverflow.com/questions/44392689/ffmpeg-vbr-cbr-conversion-and-streaming-of-mpeg-2-ts-video-files>

try bufsize = muxrate = much bigger (1.8x?) than min/maxrate...

ffmpeg exposes a lot of knobs...

you also can try '-dc 9' 10 or 11 for higher-precision in some mpeg2 math..

===========

ffmpeg -i dv28.dv -c:v mpeg2video -pix_fmt yuv422p -refs 1 -bf 2 -b:v 25M -maxrate 25M -minrate 25M -bufsize 45M -muxrate 45M -dc 10 -s 720x576 -aspect 4:3 -c:a pcm_s16be -f vob dv28.mpg

Still a lot of ouput messages (some hundreds), tested -bufsize 45M -muxrate 45M (and 50M without change):
[vob @ 0x557560237700] packet too large, ignoring buffer limits to mux it
[vob @ 0x557560237700] buffer underflow st=1 bufi=6892 size=7680
........... and lastly
frame= 3416 fps=359 q=1.6 Lsize=  446718kB time=00:02:16.60 bitrate=26790.0kbits/s speed=14.4x
video:415625kB audio:25620kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.240393%

-----------

The format setting "-f vob" in the original script, was maybe the trick that got ffmpeg to "mux" PCM audio into the mpg container, and not to other I tried(?)

VOB is usual the DVD-video container where video has max bitrate 9.8 Mbps.
I could find again if Blu-ray specification allows "VOB-video" or MPG-video here with high bitrate 25M?

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

tsMuxer
As FFMpeg would allow to mux PCM or remux MPG to M2TS, I tested tsMuxer, see the attached screenshot: tsMuxer_SD_M2TS
Input file:  dv28.mpg
Tracs:       MPEG-2 video stream and LPCM audio stream
Output:      M2TS muxing worked, Blu-ray ISO and Blu-ray Folder (tested as working fast and easy)


ffmpeg -i dv28.m2ts  2>&1 >/dev/null | egrep "Video|Audio"
  Stream #0:0[0x1011]: Video: mpeg2video (4:2:2) (HDMV / 0x564D4448), yuv422p(tv, progressive), 720x576 [SAR 16:15 DAR 4:3], 25000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
  Stream #0:1[0x1100]: Audio: pcm_bluray (HDMV / 0x564D4448), 48000 Hz, stereo, s16, 1536 kb/s

ffmpeg -i dv28_Blu-ray.iso  2>&1 >/dev/null | egrep "Video|Audio"
  Stream #0:0[0x1011]: Video: mpeg2video (4:2:2) (HDMV / 0x564D4448), yuv422p(tv, progressive), 720x576 [SAR 16:15 DAR 4:3], 25000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
  Stream #0:1[0x1100]: Audio: pcm_bluray (HDMV / 0x564D4448), 48000 Hz, stereo, s16, 1536 kb/s


mediainfo dv28.m2ts | grep Format
Format                                   : BDAV
Format/Info                              : Blu-ray Video
Format                                   : MPEG Video
Format version                           : Version 2
Format profile                           : 4:2:2@Main
Format settings                          : BVOP
Format settings, BVOP                    : Yes
Format settings, Matrix                  : Default
Format settings, GOP                     : M=3, N=12
Format                                   : PCM
Format settings                          : Big / Signed


mediainfo dv28_Blu-ray.iso | grep Format
Format                                   : MPEG Video
Format version                           : Version 2
Format                                   : MPEG Video
Format version                           : Version 2
Format profile                           : 4:2:2@Main
Format settings                          : BVOP
Format settings, BVOP                    : Yes
Format settings, Matrix                  : Default
Format settings, GOP                     : M=3, N=12


 tree -h BDMV
BDMV
├── [4.0K]  AUXDATA
├── [4.0K]  BACKUP
│   ├── [4.0K]  BDJO
│   ├── [4.0K]  CLIPINF
│   │   └── [1.8K]  00000.clpi
│   ├── [ 120]  index.bdmv
│   ├── [ 290]  MovieObject.bdmv
│   └── [4.0K]  PLAYLIST
│       └── [ 170]  00000.mpls
├── [4.0K]  BDJO
├── [4.0K]  CLIPINF
│   └── [1.8K]  00000.clpi
├── [ 120]  index.bdmv
├── [4.0K]  JAR
├── [4.0K]  META
├── [ 290]  MovieObject.bdmv
├── [4.0K]  PLAYLIST
│   └── [ 170]  00000.mpls
└── [4.0K]  STREAM
    └── [456M]  00000.m2ts

11 directories, 9 files

===========

for minimising disk loss you probably can prep. few samples with different encoding/muxing params and burn them all on one disk and see how well/bad your hw player plays (and seeks) them..

Good idea.
I tried to burn dv28_Blu-ray.iso to a DVD-R disc with the gui burners Brasero and K3b, but both quitted at start with Failure.

Suggestion to how customize the previous "CL for HDV to Blu-ray" to burn the now ready made dv28_Blu-ray.iso (with udf included?)
and also the BDMV and CERTIFICATE folders to DVD-R/DVD+R and DVD+RW discs?

========

Terje J. H