[Cin] qctools, sonic lineup
Terje J. Hanssen
terjejhanssen at gmail.com
Mon Jan 22 17:47:02 CET 2024
Den 22.01.2024 17:00, skrev Andrew Randrianasulu:
>
>
> пн, 22 янв. 2024 г., 18:39 Terje J. Hanssen <terjejhanssen at gmail.com>:
>
>
>
> Den 22.01.2024 15:05, skrev Andrew Randrianasulu:
>>
>>
>> пн, 22 янв. 2024 г., 16:18 Terje J. Hanssen
>> <terjejhanssen at gmail.com>:
>>
>>
>>
>> Den 20.01.2024 23:31, skrev Andrew Randrianasulu:
>>> Sorry Terje if I was too rough in my previous email.
>>
>> Oh, I am fine with that. I understand also some
>> user-repeating questions might be somewhat frustrating :)
>> Some of the things like anamorphic video and SAR, are issues
>> from the past - to my surprise.
>>
>>>
>>> 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.
>>>
>>> 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.
>>>
>>> /dev/shm/ffmpeg/ffmpeg -i /home/guest/CIN51.mp4 -target
>>> pal-dvd -c:a pcm_dvd -f dvd /dev/shm/cin51.mpeg
>>>
>>> ah, it only does so if decoder output floats by default
>>> (aac, may be mp3 too?)
>>>
>>> for dv it was 16 to 16.
>>
>> 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(?)
>>
>> 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?
>>
>>
>> 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).
>>
>> 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?
>>
>> Did you tried to run dvdauthor on ffmpeg-encoded and muxed mpg
>> with lpcm audio?
>
>
> Yes, I did following the simple step 2. and 3 in
> https://askubuntu.com/questions/1013703/converting-dv-to-mpeg
>
> 2. dvdauthor ran in a way, but created a very thin tree
>
> DVD01_07_PCM
> ├── [ 4096] AUDIO_TS
> └── [ 4096] VIDEO_TS
> ├── [ 12288] VTS_01_0.BUP
> ├── [ 12288] VTS_01_0.IFO
> └── [ 135628800] VTS_01_1.VOB
>
>
> ffprobe -hide_banner DVD01_07_PCM/VIDEO_TS/VTS_01_1.VOB
> Input #0, mpeg, from 'DVD01_07_PCM/VIDEO_TS/VTS_01_1.VOB':
> Duration: 00:01:53.28, start: 0.540000, bitrate: 9577 kb/s
> Stream #0:0[0x1bf]: Data: dvd_nav_packet
> Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv,
> progressive), 720x576 [SAR 16:15 DAR 4:3], 25 fps, 25 tbr, 90k
> tbn, 50 tbc
> Side data:
> cpb: bitrate max/min/avg: 9000000/0/0 buffer size:
> 1835008 vbv_delay: N/A
> Stream #0:2[0xa0]: Audio: pcm_dvd, 48000 Hz, 2 channels,
> s16, 1536 kb/s
> Unsupported codec with id 100357 for input stream 0
>
>
> VLC could playback the final VTS_01_1.VOB file
>
> 3. mkisofs did NOT create the dvd iso.
>
>
> what kind of xml file you used with dvdauthor? one created by hand, or
> from cingg/devede-ng ?
I didn't use any xml file, just ran the command line in a terminal as I
simply understood the Ubuntu url above:
dvdauthor -t -o dvd01_07_pcm --video=pal -f dvd01_07_pcm.vob
mkisofs -dvd-video -o testing.iso DVD01_07_PCM
>
>
>
> When I got DeVeDe to work earlier last year, it created a much
> more complete tree structure and also the iso
> https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg05766.html
> and unanswered
> 3) and 4) at FFmpeg-user, possibly a bit different ffmpeg, due to
> the buffer underflow messages
> https://lists.ffmpeg.org//pipermail/ffmpeg-user/2023-March/056229.html
>
>
>
> "The question here is if pcm_dvd audio has been changed or "transcoded"
> from "PCM signed 20|24-bit big-endian" to 16 bits?
>
> "
>
> I think ffmpeg 6.1 defaulted to s32 audio conversion by default. So if
> input was 24 bit or float it should be encoded as 24bit dvd pcm audio.
>
> 20 bit probably still not plumbed in inside ffmpeg correctly.
Honestly I don't remember why I really asked this last question, because
ffprobe reported for me apparently corresponding I/O audio
dv01.dv (input source): Audio: pcm_s16le, 48000 Hz, stereo, s16,
1536 kb/s
dv01.mpg (ffmpeg output): Audio: pcm_dvd, 48000 Hz, stereo, s16,
1536 kb/s
VTS_02_1.VOB (DeVeDe tree): Audio: pcm_dvd, 48000 Hz, stereo, s16,
1536 kb/s
Beside mediainfo VTS_02_1.VOB
Audio
ID : 189 (0xBD)-160 (0xA0)
Format : PCM
Format settings : Big / Signed
Muxing mode : DVD-Video
Duration : 9 min 56 s
Bit rate mode : Constant
Bit rate : 1 536 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Bit depth : 16 bits
Stream size : 109 MiB (16%)
>
>
>
>>
>>
>>
>> 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
>>
>> [dv @ 0x55d83fb616c0] Estimating duration from bitrate,
>> this may be inaccurate
>> Input #0, dv, from 'dv01_07.dv':
>> Metadata:
>> timecode : 01:09:35:09
>> Duration: 00:01:53.28, start: 0.000000, bitrate: 28800 kb/s
>> Stream #0:0: Video: dvvideo, yuv420p, 720x576 [SAR
>> 16:15 DAR 4:3], 25000 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc
>> Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16,
>> 1536 kb/s
>> Multiple -c, -codec, -acodec, -vcodec, -scodec or -dcodec
>> options specified for stream 1, only the last option
>> '-c:a pcm_dvd' will be used.
>> Stream mapping:
>> Stream #0:0 -> #0:0 (dvvideo (native) -> mpeg2video
>> (native))
>> Stream #0:1 -> #0:1 (pcm_s16le (native) -> pcm_dvd
>> (native))
>> Press [q] to stop, [?] for help
>> Output #0, dvd, to 'dvd01_07_pcm.mpg':
>> Metadata:
>> timecode : 01:09:35:09
>> encoder : Lavf58.76.100
>> 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
>> Metadata:
>> encoder : Lavc58.134.100 mpeg2video
>> Side data:
>> cpb: bitrate max/min/avg: 9000000/0/8000000 buffer
>> size: 1835008 vbv_delay: N/A
>> Stream #0:1: Audio: pcm_dvd, 48000 Hz, stereo, s16,
>> 1536 kb/s
>> Metadata:
>> encoder : Lavc58.134.100 pcm_dvd
>> frame= 2832 fps=149 q=2.0 Lsize= 132450kB
>> time=00:01:53.27 bitrate=9578.8kbits/s speed=5.95x
>> video:108950kB audio:21272kB subtitle:0kB other
>> streams:0kB global headers:0kB muxing overhead: 1.711336%
>>
>>
>>>
>>> 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.
>>>
>>> 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.
>>>
>>> I was looking for some quality control tools and found
>>> qctools and this post specifically on stackexchange
>>>
>>> https://sound.stackexchange.com/questions/40222/show-the-differences-between-two-similar-audio-files-using-graphical-method
>>>
>>> it mentions program named Sonic Lineup, hopefully easy (and
>>> working on Linux) way to compare two audio files.
>>>
>>> Not sure if it supports dvd audio tho ....
>>>
>>> https://sonicvisualiser.org/sonic-lineup/index.html
>>>
>>> qctools are more aiming at video quality metrics, just build
>>> their latest tool:
>>>
>>> https://mediaarea.net/QCTools
>>>
>>> I am sure you can get Appimage or even rpm from their site.
>>>
>>>
>>>
>>>
>>
>
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