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List: mjpeg-users
Subject: [Mjpeg-users] LPCM audio too loud?
From: Andrew Randrianasulu <randrianasulu () gmail ! com>
Date: 2024-01-20 13:23:36
Message-ID: CA+rFky7-7Er6nsVJQFRattbVE55zEYWJDDB=7GG-McXu13NxSg () mail ! gmail ! com
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Hello!
I am trying to develop procedure for making DVDs with LPCM audio using
Linux NLE Cinelerra-gg [1]
It works, but for some reason our lpcm file received as TOO LOUD by
default, so I must quieten down whole sound track by 40 db.
short (less than 3 min) video
https://youtu.be/-NE2LZsVUjo
Is there some switch to mplex I missed?
mplex log:
====
/dev/shm//dvd_20240120-153459/dvd.sh
running /dev/shm//dvd_20240120-153459/dvd.sh
INFO: [mplex] mplex version 2.2.1 (2.2.7 $Date: 2012-11-17 01:55:16 $)
INFO: [mplex] File /dev/shm/dvd_20240120-153459/dvd.m2v looks like
an MPEG Video stream.
INFO: [mplex] File /dev/shm/dvd_20240120-153459/dvd.lpcm looks like
an LPCM Audio stream.
INFO: [mplex] Video stream 0: profile 8 selected - ignoring
non-standard options!
INFO: [mplex] Found 1 audio streams, 1 video streams and 0 subtitle streams
INFO: [mplex] Selecting dvdauthor DVD output profile
INFO: [mplex] Multiplexing video program stream!
INFO: [mplex] Scanning for header info: Video stream e0
(/dev/shm/dvd_20240120-153459/dvd.m2v)
INFO: [mplex] VIDEO STREAM: e0
INFO: [mplex] Frame width : 720
INFO: [mplex] Frame height : 576
INFO: [mplex] Aspect ratio : 4:3 display
INFO: [mplex] Picture rate : 25.000 frames/sec
INFO: [mplex] Bit rate : 9000000 bits/sec
INFO: [mplex] Vbv buffer size : 229376 bytes
INFO: [mplex] CSPF : 0
INFO: [mplex] Scanning for header info: LPCM Audio stream 00
(/dev/shm/dvd_20240120-153459/dvd.lpcm)
INFO: [mplex] LPCM AUDIO STREAM:
INFO: [mplex] Bit rate : 192000 bytes/sec (1536000) bit/sec)
INFO: [mplex] Channels : 2
INFO: [mplex] Bits per sample: 16
INFO: [mplex] Frequency : 48000 Hz
INFO: [mplex] SYSTEMS/PROGRAM stream:
INFO: [mplex] rough-guess multiplexed stream data rate : 10753200
INFO: [mplex] target data-rate specified : 10080000
++ WARN: [mplex] Target data rate lower than computed requirement!
++ WARN: [mplex] N.b. a 20% or so discrepancy in variable bit-rate
++ WARN: [mplex] streams is common and harmless provided no time-outs will occur
INFO: [mplex] Run-in delay = 10800 Video delay = 10800 Audio delay = 14400
INFO: [mplex] New sequence commences...
INFO: [mplex] Video e0: buf= 0 frame=000000 sector=00000000
INFO: [mplex] Audio bd: buf= 0 frame=000000 sector=00000000
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=18139
required(DTS)=18000
++ WARN: [mplex] Video e0: buf= 61773 frame=000002 sector=00000119
++ WARN: [mplex] Audio bd: buf= 352 frame=000025 sector=00000004
INFO: [mplex] STREAM e0 completed
INFO: [mplex] STREAM bd completed
INFO: [mplex] Multiplex completion at SCR=5399259.
INFO: [mplex] Video e0: completed
INFO: [mplex] Audio bd: completed
INFO: [mplex] VIDEO_STATISTICS: e0
INFO: [mplex] Video Stream length: 60133444 bytes
INFO: [mplex] Sequence headers: 85
INFO: [mplex] Sequence ends : 0
INFO: [mplex] No. Pictures : 1500
INFO: [mplex] No. Groups : 85
INFO: [mplex] No. I Frames : 85 avg. size 59075 bytes
INFO: [mplex] No. P Frames : 1415 avg. size 38948 bytes
INFO: [mplex] No. B Frames : 0 avg. size 0 bytes
INFO: [mplex] Average bit-rate : 8017600 bits/sec
INFO: [mplex] Peak bit-rate : 9707600 bits/sec
INFO: [mplex] BUFFERING min 16 Buf max 235543
INFO: [mplex] AUDIO_STATISTICS: bd
INFO: [mplex] Audio stream length 11520000 bytes.
INFO: [mplex] Frames : 35999
INFO: [mplex] BUFFERING min 32 Buf max 54832
**ERROR: [mplex] MUX STATUS: Frame data under-runs detected!
DVDAuthor::dvdauthor, version 0.7.2.
Build options: gnugetopt imagemagick iconv freetype fribidi fontconfig
Send bug reports to <dvdauthor-users@lists.sourceforge.net>
INFO: default video format is PAL
INFO: dvdauthor creating VTS
STAT: Picking VTS 01
STAT: Processing /dev/shm/dvd_20240120-153459/dvd.mpg...
STAT: VOBU 80 at 65MB, 1 PGCs
INFO: Video pts = 0.160 .. 60.160
INFO: Audio[16] pts = 0.160 .. 60.160
STAT: VOBU 85 at 69MB, 1 PGCs
CHAPTERS: VTS[1/1] 0.000
INFO: Generating VTS with the following video attributes:
INFO: MPEG version: mpeg2
INFO: TV standard: pal
INFO: Aspect ratio: 4:3
INFO: Resolution: 720x576
INFO: Audio ch 0 format: pcm/2ch, 48khz 16bps, 'en'
STAT: fixed 85 VOBUs
INFO: dvdauthor creating table of contents
INFO: Scanning /dev/shm/dvd_20240120-153459/iso/VIDEO_TS/VTS_01_0.IFO
To burn dvd, load blank media and run:
growisofs -dvd-compat -Z /dev/dvd -dvd-video /dev/shm/dvd_20240120-153459/iso
Завершено
=======
mplex command line (part of the script)
mplex -f 8 -L 48000:2:16 -o $dir/dvd.mpg $dir/dvd.m2v $dir/dvd.lpcm
[1] https://cinelerra-gg.org/download/testing/ - there are two
appimages (one for newish distros and second for something like Ubuntu
16/x86-64)
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