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Groups > comp.os.linux.misc > #77600

fmpeg drift (1)

From "Carlos E.R." <robin_listas@es.invalid>
Newsgroups comp.os.linux.misc
Subject fmpeg drift (1)
Date 2025-11-16 00:29 +0100
Message-ID <gvenulx8b7.ln2@Telcontar.valinor> (permalink)
References (5 earlier) <69179e3a@news.ausics.net> <98lkulxo66.ln2@Telcontar.valinor> <ffmpeg-20251114231123@ram.dialup.fu-berlin.de> <jsokulxo6q.ln2@Telcontar.valinor> <ffmpeg-20251115002632@ram.dialup.fu-berlin.de>

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On 2025-11-15 00:27, Stefan Ram wrote:
> "Carlos E.R." <robin_listas@es.invalid> wrote or quoted:
>> Yes, I tried chatgpt to do a video conversion. I have no sound in the
>> converted file, and we tried several concoctions. The mail list did not
>> help, either. They get angry at people, too.
> 
>    One might start with (untested):
> 
> ffmpeg -err_detect ignore_err -i input.mpg -map 0 -c:v copy -c:a copy
> -copy_unknown output.mpg
> 
>    which hopefully should copy the audio, because "-map 0
>    -copy_unknown" tells ffmpeg to copy all streams and "-c:a copy"
>    to just copy the audio with no transcoding. Then, "-c:v copy"
>    could be modified to request a different codec for the video.
> 
>    However, it's possible that not every version/build of ffmpeg
>    has the options I used above.

My reply was rejected and not posted. Trying to break it out in sections, and breaking long lines.

<7.6> 2025-11-15T14:46:57.984338+01:00 Telcontar fetchnews 3297 - -  Posting /var/spool/news/out.going/2196-1763214408-1
<7.5> 2025-11-15T14:46:58.244697+01:00 Telcontar fetchnews 3297 - -  Unable to post /var/spool/news/out.going/2196-1763214408-1: "441 437 Binary in non-binary group (comp.os.linux.misc)".
<7.6> 2025-11-15T14:51:58.707971+01:00 Telcontar fetchnews 4652 - -  Posting /var/spool/news/out.going/2196-1763214408-1
<7.6> 2025-11-15T14:51:58.962001+01:00 Telcontar fetchnews 4652 - -  Duplicate article /var/spool/news/out.going/2196-1763214408-1, treating as success.
<7.6> 2025-11-15T14:56:58.677167+01:00 Telcontar fetchnews 6498 - -  Posting /var/spool/news/out.going/2196-1763214408-1



I said:

Huh, I'd better post my last try so you have the full information. And with all the printout, as the guys at the ffmpeg list demanded.


cer@Telcontar:/mnt/nfs/Isengard/xfsRaid/Videos/tmp> ffmpeg -t 10:0 -i movie.mkv -vf "scale=-1:802,format=yuv420p" -map 0 -c:v libx264 -preset fast -crf 22 -tune fastdecode -profile:v main -c:a libopus -ac 6 -c:s copy 8d_movie.mkv
ffmpeg version 8.0 Copyright (c) 2000-2025 the FFmpeg developers
   built with gcc 7 (SUSE Linux)
   configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --incdir=/usr/include/ffmpeg --extra-cflags='-fmessage-length=0 -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables
	-fasynchronous-unwind-tables -fstack-clash-protection -g' --optflags='-fmessage-length=0 -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables
	-fstack-clash-protection -g' --disable-htmlpages --enable-pic --disable-stripping --enable-shared --disable-static --enable-gpl --enable-version3 --enable-libsmbclient --disable-openssl --enable-gnutls --enable-ladspa
	--enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcdio --enable-libdav1d --enable-libdc1394 --enable-libdrm --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgsm
	--enable-libiec61883 --enable-libjack --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopenh264 --enable-libopus --enable-libpulse --enable-librav1e --enable-libsvtav1 --enable-libsoxr
	--enable-libspeex --enable-libssh --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libzimg
	--enable-libzmq --enable-libzvbi --enable-lv2 --enable-libvpl --enable-vaapi --enable-vdpau --enable-version3 --enable-libfdk-aac-dlopen --enable-nonfree --enable-libvo-amrwbenc --enable-libx264 --enable-libx265 --enable-libxvid
   libavutil      60.  8.100 / 60.  8.100
   libavcodec     62. 11.100 / 62. 11.100
   libavformat    62.  3.100 / 62.  3.100
   libavdevice    62.  1.100 / 62.  1.100
   libavfilter    11.  4.100 / 11.  4.100
   libswscale      9.  1.100 /  9.  1.100
   libswresample   6.  1.100 /  6.  1.100
Input #0, matroska,webm, from 'movie.mkv':
   Metadata:
     encoder         : libebml v1.4.2 + libmatroska v1.6.4
     creation_time   : 2022-05-15T21:04:13.000000Z
   Duration: 00:54:17.60, start: 0.000000, bitrate: 4608 kb/s
   Stream #0:0: Video: hevc (Main 10), yuv420p10le(tv, bt709), 3840x1604, SAR 1:1 DAR 960:401, 23.98 fps, 23.98 tbr, 1k tbn (default)
     Metadata:
       BPS             : 3966208
       DURATION        : 00:54:17.588000000
       NUMBER_OF_FRAMES: 78104
       NUMBER_OF_BYTES : 1615034142
       _STATISTICS_WRITING_APP: mkvmerge v67.0.0 ('Under Stars') 64-bit
       _STATISTICS_WRITING_DATE_UTC: 2022-05-15 21:04:13
       _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
   Stream #0:1(eng): Audio: eac3, 48000 Hz, 5.1(side), fltp, 640 kb/s
     Metadata:
       BPS             : 640000
       DURATION        : 00:54:17.600000000
       NUMBER_OF_FRAMES: 101800
       NUMBER_OF_BYTES : 260608000
       _STATISTICS_WRITING_APP: mkvmerge v67.0.0 ('Under Stars') 64-bit
       _STATISTICS_WRITING_DATE_UTC: 2022-05-15 21:04:13
       _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
   Stream #0:2(eng): Subtitle: subrip (srt)
     Metadata:
       BPS             : 79
       DURATION        : 00:52:31.318000000
       NUMBER_OF_FRAMES: 980
       NUMBER_OF_BYTES : 31376
       _STATISTICS_WRITING_APP: mkvmerge v67.0.0 ('Under Stars') 64-bit
       _STATISTICS_WRITING_DATE_UTC: 2022-05-15 21:04:13
       _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
   Stream #0:3(eng): Subtitle: subrip (srt) (hearing impaired)
     Metadata:
       title           : SDH
       BPS             : 84
       DURATION        : 00:52:40.980000000
       NUMBER_OF_FRAMES: 1041
       NUMBER_OF_BYTES : 33504
       _STATISTICS_WRITING_APP: mkvmerge v67.0.0 ('Under Stars') 64-bit
       _STATISTICS_WRITING_DATE_UTC: 2022-05-15 21:04:13
       _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Stream mapping:
   Stream #0:0 -> #0:0 (hevc (native) -> h264 (libx264))
   Stream #0:1 -> #0:1 (eac3 (native) -> opus (libopus))
   Stream #0:2 -> #0:2 (copy)
   Stream #0:3 -> #0:3 (copy)
Press [q] to stop, [?] for help
[libopus @ 0x5641052e3d00] No bit rate set. Defaulting to 320000 bps.
[libx264 @ 0x5641048130c0] using SAR=1/1
[libx264 @ 0x5641048130c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x5641048130c0] profile Main, level 4.0, 4:2:0, 8-bit
[libx264 @ 0x5641048130c0] 264 - core 164 - H.264/MPEG-4 AVC codec - Copyleft 2003-2023 - http://www.videolan.org/x264.html - options: cabac=0 ref=2 deblock=0:0:0 analyse=0x1:0x111 me=hex subme=6 psy=1 psy_rd=1.00:0.00 mixed_ref=1
	me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=18 lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3
	b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=0 open_gop=0 weightp=0 keyint=250 keyint_min=23 scenecut=40 intra_refresh=0 rc_lookahead=30 rc=crf mbtree=1 crf=22.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, matroska, to '8d_movie.mkv':
   Metadata:
     encoder         : Lavf62.3.100
   Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p(tv, bt709, progressive), 1920x802 [SAR 1:1 DAR 960:401], q=2-31, 23.98 fps, 1k tbn (default)
     Metadata:
       encoder         : Lavc62.11.100 libx264
       BPS             : 3966208
       DURATION        : 00:54:17.588000000
       NUMBER_OF_FRAMES: 78104
       NUMBER_OF_BYTES : 1615034142
       _STATISTICS_WRITING_APP: mkvmerge v67.0.0 ('Under Stars') 64-bit
       _STATISTICS_WRITING_DATE_UTC: 2022-05-15 21:04:13
       _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
     Side data:
       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
   Stream #0:1(eng): Audio: opus ([255][255][255][255] / 0xFFFFFFFF), 48000 Hz, 5.1, flt, 320 kb/s
     Metadata:
       encoder         : Lavc62.11.100 libopus
       BPS             : 640000
       DURATION        : 00:54:17.600000000
       NUMBER_OF_FRAMES: 101800
       NUMBER_OF_BYTES : 260608000
       _STATISTICS_WRITING_APP: mkvmerge v67.0.0 ('Under Stars') 64-bit
       _STATISTICS_WRITING_DATE_UTC: 2022-05-15 21:04:13
       _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
   Stream #0:2(eng): Subtitle: subrip (default)
     Metadata:
       BPS             : 79
       DURATION        : 00:52:31.318000000
       NUMBER_OF_FRAMES: 980
       NUMBER_OF_BYTES : 31376
       _STATISTICS_WRITING_APP: mkvmerge v67.0.0 ('Under Stars') 64-bit
       _STATISTICS_WRITING_DATE_UTC: 2022-05-15 21:04:13
       _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
   Stream #0:3(eng): Subtitle: subrip (hearing impaired)
     Metadata:
       title           : SDH
       BPS             : 84
       DURATION        : 00:52:40.980000000
       NUMBER_OF_FRAMES: 1041
       NUMBER_OF_BYTES : 33504
       _STATISTICS_WRITING_APP: mkvmerge v67.0.0 ('Under Stars') 64-bit
       _STATISTICS_WRITING_DATE_UTC: 2022-05-15 21:04:13
       _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
[out#0/matroska @ 0x5641048407c0] video:158239KiB audio:23658KiB subtitle:10KiB other streams:0KiB global headers:0KiB muxing overhead: 0.178860%
frame=14386 fps= 94 q=-1.0 Lsize=  182231KiB time=00:09:59.77 bitrate=2489.0kbits/s speed=3.91x elapsed=0:02:33.51
[libx264 @ 0x5641048130c0] frame I:175   Avg QP:16.17  size: 73474
[libx264 @ 0x5641048130c0] frame P:4190  Avg QP:19.45  size: 20328
[libx264 @ 0x5641048130c0] frame B:10021 Avg QP:21.28  size:  6387
[libx264 @ 0x5641048130c0] consecutive B-frames:  5.7%  3.1%  3.6% 87.6%
[libx264 @ 0x5641048130c0] mb I  I16..4: 54.4%  0.0% 45.6%
[libx264 @ 0x5641048130c0] mb P  I16..4: 12.2%  0.0%  3.9%  P16..4: 36.1%  8.9%  3.8%  0.0%  0.0%    skip:35.1%
[libx264 @ 0x5641048130c0] mb B  I16..4:  4.1%  0.0%  0.4%  B16..8: 18.0%  3.1%  0.1%  direct:10.7%  skip:63.5%  L0:43.0% L1:49.6% BI: 7.5%
[libx264 @ 0x5641048130c0] coded y,uvDC,uvAC intra: 19.1% 56.1% 10.4% inter: 3.8% 17.8% 0.4%
[libx264 @ 0x5641048130c0] i16 v,h,dc,p: 41% 24% 13% 22%
[libx264 @ 0x5641048130c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 19% 21%  6%  7%  6%  6%  5%  4%
[libx264 @ 0x5641048130c0] i8c dc,h,v,p: 62% 17% 16%  5%
[libx264 @ 0x5641048130c0] ref P L0: 66.6% 33.4%
[libx264 @ 0x5641048130c0] ref B L0: 82.6% 17.4%
[libx264 @ 0x5641048130c0] ref B L1: 95.3%  4.7%
[libx264 @ 0x5641048130c0] kb/s:2160.42
cer@Telcontar:/mnt/nfs/Isengard/xfsRaid/Videos/tmp>


Now try to play it.


cer@Telcontar:/mnt/nfs/Isengard/xfsRaid/Videos/tmp> vlc 8d_movie.mkv
VLC media player 3.0.21 Vetinari (revision 3.0.21-0-gdd8bfdbabe8)
[000055bfa949d9a0] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
[00007f2468f46ab0] opus decoder error: cannot read Opus header
[00007f2468f46ab0] opus decoder error: initial Opus header is corrupted
[00007f2468f46ab0] opus decoder error: cannot read Opus header
[00007f2468f46ab0] opus decoder error: initial Opus header is corrupted
[00007f2468f46ab0] opus decoder error: cannot read Opus header
[00007f2468f46ab0] opus decoder error: initial Opus header is corrupted
[00007f2468f46ab0] opus decoder error: cannot read Opus header
[00007f2468f46ab0] opus decoder error: initial Opus header is corrupted
[00007f2468f46ab0] opus decoder error: cannot read Opus header
[00007f2468f46ab0] opus decoder error: initial Opus header is corrupted
[00007f2468f46ab0] opus decoder error: cannot read Opus header
[00007f2468f46ab0] opus decoder error: initial Opus header is corrupted
[00007f2468f46ab0] opus decoder error: cannot read Opus header
[00007f2468f46ab0] opus decoder error: initial Opus header is corrupted
[00007f2468f46ab0] opus decoder error: cannot read Opus header
[00007f2468f46ab0] opus decoder error: initial Opus header is corrupted
[00007f2468f46ab0] opus decoder error: cannot read Opus header
[00007f2468f46ab0] opus decoder error: initial Opus header is corrupted
[00007f2468f46ab0] opus decoder error: cannot read Opus header
[00007f2468f46ab0] opus decoder error: initial Opus header is corrupted
[00007f2468f46ab0] opus decoder error: cannot read Opus header
[00007f2468f46ab0] opus decoder error: initial Opus header is corrupted

... many of the same

[00007f2468f46ab0] opus decoder error: initial Opus header is corrupted
[00007f2468f46ab0] opus decoder error: cannot read Opus header
[00007f2468f46ab0] opus decoder error: initial Opus header is corrupted
[00007f2468f46ab0] opus decoder error: cannot read Opus header
[00007f2468f46ab0] opus decoder error: initial Opus header is corrupted
[00007f2468f46ab0] opus decoder error: cannot read Opus header
[00007f2468f46ab0] opus decoder error: initial Opus header is corrupted
[00007f2468f46ab0] opus decoder error: cannot read Opus header
cer@Telcontar:/mnt/nfs/Isengard/xfsRaid/Videos/tmp>


Output mediainfo:

cer@Telcontar:/mnt/nfs/Isengard/xfsRaid/Videos/tmp> mediainfo 8d_movie.mkv
General
Unique ID                                : 292535759913027140487632929033961707487 (0xDC145685FDFB3A5BC1FC3D84AF0D97DF)
Complete name                            : 8d_movie.mkv
Format                                   : Matroska
Format version                           : Version 4
File size                                : 178 MiB
Duration                                 : 10 min 0 s
Overall bit rate                         : 2 488 kb/s
Frame rate                               : 130.170 FPS
Writing application                      : Lavf62.3.100
Writing library                          : Lavf62.3.100
ErrorDetectionType                       : Per level 1

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : Main@L4
Format settings                          : 4 Ref Frames
Format settings, CABAC                   : No
Format settings, Reference frames        : 4 frames
Codec ID                                 : V_MPEG4/ISO/AVC
Duration                                 : 10 min 0 s
Bit rate                                 : 3 966 kb/s
Width                                    : 1 920 pixels
Height                                   : 802 pixels
Display aspect ratio                     : 2.39:1
Frame rate mode                          : Variable
Frame rate                               : 130.170 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.020
Stream size                              : 1.50 GiB
Writing library                          : x264 core 164
Encoding settings                        : cabac=0 / ref=2 / deblock=0:0:0 / analyse=0x1:0x111 / me=hex / subme=6 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=0 / cqm=0 /
	deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=18 / lookahead_threads=3 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 /
	b_adapt=1 / b_bias=0 / direct=1 / weightb=0 / open_gop=0 / weightp=0 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=30 / rc=crf / mbtree=1 / crf=22.0 / qcomp=0.60 / qpmin=0 /
	qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Default                                  : Yes
Forced                                   : No
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

Audio
ID                                       : 2
Format                                   : Opus
Codec ID                                 : A_OPUS
Duration                                 : 10 min 0 s
Bit rate                                 : 640 kb/s
Channel(s)                               : 6 channels
Channel layout                           : L R C Lb Rb LFE
Sampling rate                            : 48.0 kHz
Frame rate                               : 169.664 FPS (283 SPF)
Bit depth                                : 32 bits
Compression mode                         : Lossy
Stream size                              : 249 MiB
Writing library                          : Lavc62.11.100 libopus
Language                                 : English
Default                                  : No
Forced                                   : No

Text #1
ID                                       : 3
Format                                   : UTF-8
Codec ID                                 : S_TEXT/UTF8
Codec ID/Info                            : UTF-8 Plain Text
Duration                                 : 9 min 59 s
Bit rate                                 : 79 b/s
Frame rate                               : 1.634 FPS
Count of elements                        : 980
Stream size                              : 30.6 KiB (0%)
Language                                 : English
Default                                  : Yes
Forced                                   : No

Text #2
ID                                       : 4
Format                                   : UTF-8
Codec ID                                 : S_TEXT/UTF8
Codec ID/Info                            : UTF-8 Plain Text
Duration                                 : 9 min 59 s
Bit rate                                 : 84 b/s
Frame rate                               : 1.736 FPS
Count of elements                        : 1041
Stream size                              : 32.7 KiB (0%)
Title                                    : SDH
Language                                 : English
Default                                  : No
Forced                                   : No


cer@Telcontar:/mnt/nfs/Isengard/xfsRaid/Videos/tmp>


Source video media info:


cer@Telcontar:/mnt/nfs/Isengard/xfsRaid/Videos/tmp> mediainfo movie.mkv
General
Unique ID                                : 271279799347578328510273573056556095920 (0xCC1696C14DD847778B2137B3485CD9B0)
Complete name                            : movie.mkv
Format                                   : Matroska
Format version                           : Version 4
File size                                : 1.75 GiB
Duration                                 : 54 min 17 s
Overall bit rate                         : 4 608 kb/s
Frame rate                               : 23.976 FPS
Encoded date                             : 2022-05-15 21:04:13 UTC
Writing application                      : mkvmerge v67.0.0 ('Under Stars') 64-bit
Writing library                          : libebml v1.4.2 + libmatroska v1.6.4

Video
ID                                       : 1
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Main 10@L5@Main
Codec ID                                 : V_MPEGH/ISO/HEVC
Duration                                 : 54 min 17 s
Bit rate                                 : 3 966 kb/s
Width                                    : 3 840 pixels
Height                                   : 1 604 pixels
Display aspect ratio                     : 2.39:1
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 10 bits
Bits/(Pixel*Frame)                       : 0.027
Stream size                              : 1.50 GiB (86%)
Writing library                          : x265 3.5+12+14-106329cbd:[Windows][GCC 10.3.0][64 bit] 10bit
Encoding settings                        : cpuid=1111039 / frame-threads=2 / numa-pools=4 / wpp / no-pmode / no-pme / no-psnr / ssim / log-level=2 / input-csp=1 / input-res=3840x1604 / interlace=0 / total-frames=78104 /
	level-idc=0 / high-tier=1 / uhd-bd=0 / ref=3 / no-allow-non-conformance / no-repeat-headers / annexb / no-aud / no-eob / no-eos / no-hrd / info / hash=0 / no-temporal-layers / open-gop / min-keyint=23 /
	keyint=250 / gop-lookahead=0 / bframes=8 / b-adapt=2 / b-pyramid / bframe-bias=0 / rc-lookahead=80 / lookahead-slices=8 / scenecut=40 / no-hist-scenecut / radl=0 / no-splice / no-intra-refresh / ctu=64 /
	min-cu-size=8 / no-rect / no-amp / max-tu-size=32 / tu-inter-depth=1 / tu-intra-depth=1 / limit-tu=0 / rdoq-level=0 / dynamic-rd=0.00 / no-ssim-rd / signhide / no-tskip / nr-intra=0 / nr-inter=0 /
	no-constrained-intra / no-strong-intra-smoothing / max-merge=5 / limit-refs=3 / no-limit-modes / me=3 / subme=5 / merange=57 / temporal-mvp / no-frame-dup / no-hme / weightp / no-weightb /
	no-analyze-src-pics / deblock=0:0 / sao / no-sao-non-deblock / rd=3 / selective-sao=4 / early-skip / no-rskip / no-fast-intra / no-tskip-fast / no-cu-lossless / b-intra / no-splitrd-skip / rdpenalty=0 /
	psy-rd=2.00 / psy-rdoq=0.00 / no-rd-refine / no-lossless / cbqpoffs=0 / crqpoffs=0 / rc=crf / crf=20.0 / qcomp=0.60 / qpstep=4 / stats-write=0 / stats-read=0 / ipratio=1.40 / pbratio=1.30 / aq-mode=3 /
	aq-strength=1.00 / cutree / zone-count=0 / no-strict-cbr / qg-size=32 / no-rc-grain / qpmax=69 / qpmin=0 / no-const-vbv / sar=0 / overscan=0 / videoformat=5 / range=0 / colorprim=1 / transfer=1 / colormatrix=1 /
	chromaloc=0 / display-window=0 / cll=0,0 / min-luma=0 / max-luma=1023 / log2-max-poc-lsb=8 / vui-timing-info / vui-hrd-info / slices=1 / no-opt-qp-pps / no-opt-ref-list-length-pps / no-multi-pass-opt-rps /
	scenecut-bias=0.05 / hist-threshold=0.03 / no-opt-cu-delta-qp / no-aq-motion / no-hdr10 / no-hdr10-opt / no-dhdr10-opt / no-idr-recovery-sei / analysis-reuse-level=0 / analysis-save-reuse-level=0 /
	analysis-load-reuse-level=0 / scale-factor=0 / refine-intra=0 / refine-inter=0 / refine-mv=1 / refine-ctu-distortion=0 / no-limit-sao / ctu-info=0 / no-lowpass-dct / refine-analysis-type=0 / copy-pic=1 /
	max-ausize-factor=1.0 / no-dynamic-refine / no-single-sei / no-hevc-aq / no-svt / no-field / qp-adaptation-range=1.00 / scenecut-aware-qp=0 / conformance-window-right-offset=0 /
	conformance-window-bottom-offset=0 / decoder-max-rate=0 / no-vbv-live-multi-pass
Default                                  : Yes
Forced                                   : No
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

Audio
ID                                       : 2
Format                                   : E-AC-3
Format/Info                              : Enhanced AC-3
Commercial name                          : Dolby Digital Plus
Codec ID                                 : A_EAC3
Duration                                 : 54 min 17 s
Bit rate mode                            : Constant
Bit rate                                 : 640 kb/s
Channel(s)                               : 6 channels
Channel layout                           : L R C LFE Ls Rs
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Stream size                              : 249 MiB (14%)
Language                                 : English
Service kind                             : Complete Main
Default                                  : No
Forced                                   : No

Text #1
ID                                       : 3
Format                                   : UTF-8
Codec ID                                 : S_TEXT/UTF8
Codec ID/Info                            : UTF-8 Plain Text
Duration                                 : 52 min 31 s
Bit rate                                 : 79 b/s
Frame rate                               : 0.311 FPS
Count of elements                        : 980
Stream size                              : 30.6 KiB (0%)
Language                                 : English (US)
Default                                  : No
Forced                                   : No

Text #2
ID                                       : 4
Format                                   : UTF-8
Codec ID                                 : S_TEXT/UTF8
Codec ID/Info                            : UTF-8 Plain Text
Duration                                 : 52 min 40 s
Bit rate                                 : 84 b/s
Frame rate                               : 0.329 FPS
Count of elements                        : 1041
Stream size                              : 32.7 KiB (0%)
Title                                    : SDH
Language                                 : English (US)
Default                                  : No
Forced                                   : No


There! That's the full with the human suggested command line. In the second part I'll post what I tried with ChatGpt aid.





-- 
Cheers, Carlos.
ES🇪🇸, EU🇪🇺;

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Thread

My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-12 23:20 +0000
  Re: My 2 favorite tools for reading Linux manual pages the easy way Nuno Silva <nunojsilva@invalid.invalid> - 2025-11-12 23:51 +0000
    Re: My 2 favorite tools for reading Linux manual pages the easy way ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-13 11:01 +0000
      Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-13 20:05 +0000
  Re: My 2 favorite tools for reading Linux manual pages the easy way Chris Ahlstrom <OFeem1987@teleworm.us> - 2025-11-13 08:29 -0500
    Re: My 2 favorite tools for reading Linux manual pages the easy way vallor <vallor@vallor.earth> - 2025-11-13 14:46 +0000
      Re: My 2 favorite tools for reading Linux manual pages the easy way Chris Ahlstrom <OFeem1987@teleworm.us> - 2025-11-13 11:35 -0500
  Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-13 14:56 +0100
    Re: My 2 favorite tools for reading Linux manual pages the easy way vallor <vallor@vallor.earth> - 2025-11-13 14:54 +0000
      Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-13 23:14 +0100
    Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-13 20:03 +0000
      Re: My 2 favorite tools for reading Linux manual pages the easy way vallor <vallor@vallor.earth> - 2025-11-13 20:12 +0000
        Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-13 22:23 +0100
          Re: My 2 favorite tools for reading Linux manual pages the easy way not@telling.you.invalid (Computer Nerd Kev) - 2025-11-15 07:25 +1000
            Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-14 22:58 +0100
              Re: My 2 favorite tools for reading Linux manual pages the easy way ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-14 22:12 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-15 00:00 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-14 23:27 +0000
                fmpeg drift (1) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 00:29 +0100
                Re: fmpeg drift (1) Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 00:39 +0000
                Re: fmpeg drift (1) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 03:00 +0100
                Re: fmpeg drift (1) Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 02:33 +0000
                Re: fmpeg drift (1) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 15:03 +0100
                Re: fmpeg drift (1) Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 21:25 +0000
                Re: fmpeg drift (1) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-17 12:48 +0100
                Re: fmpeg drift (1) Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-18 01:00 +0000
                Re: fmpeg drift (1) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-18 07:22 +0100
                fmpeg drift (2) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 00:34 +0100
                Re: fmpeg drift (2) ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-16 13:34 +0000
                Re: fmpeg drift (2) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 15:19 +0100
                Re: fmpeg drift (2) - solved? "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 23:56 +0100
                Re: fmpeg drift (2) - solved? Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-17 00:49 +0000
                Re: fmpeg drift (2) - solved? "Carlos E.R." <robin_listas@es.invalid> - 2025-11-17 03:17 +0100
                Re: fmpeg drift (2) - solved? Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-17 02:39 +0000
                Re: fmpeg drift (2) Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 21:21 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way Joerg Walther <joerg.walther@magenta.de> - 2025-11-15 09:50 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-15 22:09 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 00:00 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 00:32 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 03:01 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 02:33 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 23:09 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 22:41 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-16 22:45 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way Joerg Walther <joerg.walther@magenta.de> - 2025-11-16 11:32 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 00:26 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-15 02:35 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-15 02:37 +0000
            Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-15 02:33 +0000
              Re: My 2 favorite tools for reading Linux manual pages the easy way not@telling.you.invalid (Computer Nerd Kev) - 2025-11-16 07:31 +1000
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-15 22:08 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way not@telling.you.invalid (Computer Nerd Kev) - 2025-11-17 07:00 +1000
  Re: My 2 favorite tools for reading Linux manual pages the easy way candycanearter07 <candycanearter07@candycanearter07.nomail.afraid> - 2025-11-13 18:50 +0000
    Re: My 2 favorite tools for reading Linux manual pages the easy way ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-13 19:20 +0000
      Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-13 20:12 +0000
        Re: My 2 favorite tools for reading Linux manual pages the easy way Nuno Silva <nunojsilva@invalid.invalid> - 2025-11-13 23:32 +0000

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