<div dir="auto"><div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">пн, 22 янв. 2024 г., 16:18 Terje J. Hanssen <<a href="mailto:terjejhanssen@gmail.com">terjejhanssen@gmail.com</a>>:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u>
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<div>Den 20.01.2024 23:31, skrev Andrew
Randrianasulu:<br>
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<div dir="auto">Sorry Terje if I was too rough in my previous
email.</div>
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Oh, I am fine with that. I understand also some user-repeating
questions might be somewhat frustrating :)<br>
Some of the things like anamorphic video and SAR, are issues from
the past - to my surprise. <br>
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<div dir="auto">I am definitely very much want to have as
error-free transcode (and as little transcode as possible in
general) as you, for same reason.</div>
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<div dir="auto">I am not sure you can absolutely trust ffmpeg
for not doing any conversion by default. For example 6.1 seems
to upconvert 16 bit audio when you select dvd_pcm audio
output.</div>
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<div dir="auto">/dev/shm/ffmpeg/ffmpeg -i /home/guest/CIN51.mp4
-target pal-dvd -c:a pcm_dvd -f dvd /dev/shm/cin51.mpeg<br>
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<div dir="auto">ah, it only does so if decoder output floats by
default (aac, may be mp3 too?)</div>
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<div dir="auto">for dv it was 16 to 16.</div>
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I haven't succeeded to get DeVeDe to author DVD and create iso again
from the ffmpeg encoded and muxed mpg with 16-bit lpcm from dv
input. No error from ffmpeg and ok playback of the mpg using VLC. So
it is possibly or seemingly working(?) <br>
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My follow-up question is if it possible in some way to "feed or
code" a similar command line to FFmpeg in CinGG's DVD Create window,
and possibly get the DVD structure and iso from this mpg?<br></div></blockquote></div></div><div dir="auto"><br></div><div dir="auto">I was trying to make this happen, but while ffmpeg shows no error on muxing - next stage (dvdauthor) reports some warnings and more importantly resulted iso folder not seekable when played by mpv (mplex muxed one works).</div><div dir="auto"><br></div><div dir="auto">So I am stuck a bit on using ffmpeg as dvd muxer ... May be if we let it encode both audio and video in one pass result will be more satisfactory?</div><div dir="auto"><br></div><div dir="auto">Did you tried to run dvdauthor on ffmpeg-encoded and muxed mpg with lpcm audio?</div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>
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<font face="Courier New, Courier, monospace">ffmpeg -hide_banner -i
dv01_07.dv -f dvd -target pal-dvd -aspect 4:3 -b:v 8M -mbd rd
-trellis 1 -cmp 0 -subcmp 2 -c:a pcm_dvd dvd01_07_pcm.mpg</font><br>
<blockquote><font face="monospace">[dv @ 0x55d83fb616c0] Estimating
duration from bitrate, this may be inaccurate</font><br>
<font face="monospace">Input #0, dv, from 'dv01_07.dv':</font><br>
<font face="monospace"> Metadata:</font><br>
<font face="monospace"> timecode : 01:09:35:09</font><br>
<font face="monospace"> Duration: 00:01:53.28, start: 0.000000,
bitrate: 28800 kb/s</font><br>
<font face="monospace"> Stream #0:0: Video: dvvideo, yuv420p,
720x576 [SAR 16:15 DAR 4:3], 25000 kb/s, 25 fps, 25 tbr, 25 tbn,
25 tbc</font><br>
<font face="monospace"> Stream #0:1: Audio: pcm_s16le, 48000 Hz,
stereo, s16, 1536 kb/s</font><br>
<font face="monospace">Multiple -c, -codec, -acodec, -vcodec,
-scodec or -dcodec options specified for stream 1, only the last
option '-c:a pcm_dvd' will be used.</font><br>
<font face="monospace">Stream mapping:</font><br>
<font face="monospace"> Stream #0:0 -> #0:0 (dvvideo (native)
-> mpeg2video (native))</font><br>
<font face="monospace"> Stream #0:1 -> #0:1 (pcm_s16le
(native) -> pcm_dvd (native))</font><br>
<font face="monospace">Press [q] to stop, [?] for help</font><br>
<font face="monospace">Output #0, dvd, to 'dvd01_07_pcm.mpg':</font><br>
<font face="monospace"> Metadata:</font><br>
<font face="monospace"> timecode : 01:09:35:09</font><br>
<font face="monospace"> encoder : Lavf58.76.100</font><br>
<font face="monospace"> Stream #0:0: Video: mpeg2video (Main),
yuv420p(bottom coded first (swapped)), 720x576 [SAR 16:15 DAR
4:3], q=2-31, 8000 kb/s, 25 fps, 90k tbn</font><br>
<font face="monospace"> Metadata:</font><br>
<font face="monospace"> encoder : Lavc58.134.100
mpeg2video</font><br>
<font face="monospace"> Side data:</font><br>
<font face="monospace"> cpb: bitrate max/min/avg:
9000000/0/8000000 buffer size: 1835008 vbv_delay: N/A</font><br>
<font face="monospace"> Stream #0:1: Audio: pcm_dvd, 48000 Hz,
stereo, s16, 1536 kb/s</font><br>
<font face="monospace"> Metadata:</font><br>
<font face="monospace"> encoder : Lavc58.134.100
pcm_dvd</font><br>
<font face="monospace">frame= 2832 fps=149 q=2.0 Lsize= 132450kB
time=00:01:53.27 bitrate=9578.8kbits/s speed=5.95x </font><br>
<font face="monospace">video:108950kB audio:21272kB subtitle:0kB
other streams:0kB global headers:0kB muxing overhead: 1.711336%</font><br>
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<div dir="auto">Not sure how good internal ffmpeg muxer for dvd
file creation, but you probably can test this by reusing cingg
created audio and video files from dvd master.</div>
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<div dir="auto">I have few more ideas to test and smart-up our
bash script so it will use wav output + sox + mplex
automatically if wav or pcm file was detected in output
directory (so you can set easy wav output and do not care
about BE pcm file and its extension), but again I need some
time to test this.</div>
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<div dir="auto">I was looking for some quality control tools and
found qctools and this post specifically on stackexchange</div>
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<div dir="auto"><a href="https://sound.stackexchange.com/questions/40222/show-the-differences-between-two-similar-audio-files-using-graphical-method" rel="noreferrer noreferrer noreferrer noreferrer" target="_blank">https://sound.stackexchange.com/questions/40222/show-the-differences-between-two-similar-audio-files-using-graphical-method</a><br>
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<div dir="auto">it mentions program named Sonic Lineup,
hopefully easy (and working on Linux) way to compare two audio
files.</div>
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<div dir="auto">Not sure if it supports dvd audio tho ....</div>
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<div dir="auto"><a href="https://sonicvisualiser.org/sonic-lineup/index.html" rel="noreferrer noreferrer noreferrer" target="_blank">https://sonicvisualiser.org/sonic-lineup/index.html</a><br>
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<div dir="auto">qctools are more aiming at video quality
metrics, just build their latest tool:</div>
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<div dir="auto"><a href="https://mediaarea.net/QCTools" rel="noreferrer noreferrer" target="_blank">https://mediaarea.net/QCTools</a><br>
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<div dir="auto">I am sure you can get Appimage or even rpm from
their site.</div>
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