[Cin] Blu-ray compliant MPEG-2 SD video with LPCM audio
Terje J. Hanssen
terjejhanssen at gmail.com
Thu Dec 2 00:12:27 CET 2021
Den 01.12.2021 18:30, skrev Andrew Randrianasulu:
>
>
> On Tuesday, November 30, 2021, Terje J. Hanssen
> <terjejhanssen at gmail.com <mailto:terjejhanssen at 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 at 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 at 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 at 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
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