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• Sporadic "Error parsing Cues... Operation not permitted" errors when trying to generate a DASH manifest

  22 novembre 2023, par kshetline

  I have already-generated .webm audio and video files (1 audio, 3 video resolutions for each video I want to stream). The video has been generated not (directly) by ffmpeg, but HandbrakeCLI 1.7.0, with V9 encoding. The audio (which has never caused an error) is generated by ffmpeg using libvorbis.

  


  Most of the time ffmpeg (version 6.1) creates a manifest without any problem. Sporadically, however, "Error parsing Cues" comes up (frequently with the latest videos I've been trying to process) and I can't create a manifest. Since this is happening during an automated process to process many videos for streaming, the audio and video sources are being created exactly the same way whether ffmpeg succeeds or fails in generating a manifest, making this all the more confusing.

  


  The video files ffmpeg chokes on play perfectly well using VLC, and mediainfo doesn't show any problems with these files.

  


  Here's the way I've been (sometimes successfully, sometimes not) generating a manifest, with extra logging added :

  


  ffmpeg -v 9 -loglevel 99 \
  -f webm_dash_manifest -i '.\Sample Video.v480.webm' \
  -f webm_dash_manifest -i '.\Sample Video.v720.webm' \
  -f webm_dash_manifest -i '.\Sample Video.v1080.webm' \
  -f webm_dash_manifest -i '.\Sample Video.audio.webm' \
  -c copy -map 0 -map 1 -map 2 -map 3 \
  -f webm_dash_manifest -adaptation_sets "id=0,streams=0,1,2 id=1,streams=3" \
  '.\Sample Video.mpd'


  


  Here's the result when it fails :

  


  ffmpeg version 6.1-full_build-www.gyan.dev Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 12.2.0 (Rev10, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --pkg-config=pkgconf --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libaribcaption --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libharfbuzz --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-dxva2 --enable-d3d11va --enable-libvpl --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      58. 29.100 / 58. 29.100
  libavcodec     60. 31.102 / 60. 31.102
  libavformat    60. 16.100 / 60. 16.100
  libavdevice    60.  3.100 / 60.  3.100
  libavfilter     9. 12.100 /  9. 12.100
  libswscale      7.  5.100 /  7.  5.100
  libswresample   4. 12.100 /  4. 12.100
  libpostproc    57.  3.100 / 57.  3.100
Splitting the commandline.
Reading option '-v' ... matched as option 'v' (set logging level) with argument '9'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument '99'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'webm_dash_manifest'.
Reading option '-i' ... matched as output url with argument '.\Sample Video.v480.webm'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'webm_dash_manifest'.
Reading option '-i' ... matched as output url with argument '.\Sample Video.v720.webm'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'webm_dash_manifest'.
Reading option '-i' ... matched as output url with argument '.\Sample Video.v1080.webm'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'webm_dash_manifest'.
Reading option '-i' ... matched as output url with argument '.\Sample Video.audio.webm'.
Reading option '-c' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '0'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '1'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '2'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '3'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'webm_dash_manifest'.
Reading option '-adaptation_sets' ... matched as AVOption 'adaptation_sets' with argument 'id=0,streams=0,1,2 id=1,streams=3'.
Reading option '.\Sample Video.mpd' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set logging level) with argument 9.
Successfully parsed a group of options.
Parsing a group of options: input url .\Sample Video.v480.webm.
Applying option f (force format) with argument webm_dash_manifest.
Successfully parsed a group of options.
Opening an input file: .\Sample Video.v480.webm.
[webm_dash_manifest @ 000002bbcb41dc80] Opening '.\Sample Video.v480.webm' for reading
[file @ 000002bbcb41e300] Setting default whitelist 'file,crypto,data'
st:0 removing common factor 1000000 from timebase
[webm_dash_manifest @ 000002bbcb41dc80] Error parsing Cues
[AVIOContext @ 000002bbcb41e5c0] Statistics: 102283 bytes read, 4 seeks
[in#0 @ 000002bbcb41dac0] Error opening input: Operation not permitted
Error opening input file .\Sample Video.v480.webm.
Error opening input files: Operation not permitted


  


  This is mediainfo for the offending input file, Sample Video.v480.webm :

  


  General
Complete name                            : .\Sample Video.v480.webm
Format                                   : WebM
Format version                           : Version 2
File size                                : 628 MiB
Duration                                 : 1 h 34 min
Overall bit rate                         : 926 kb/s
Frame rate                               : 23.976 FPS
Encoded date                             : 2023-11-21 16:48:35 UTC
Writing application                      : HandBrake 1.7.0 2023111500
Writing library                          : Lavf60.16.100

Video
ID                                       : 1
Format                                   : VP9
Format profile                           : 0
Codec ID                                 : V_VP9
Duration                                 : 1 h 34 min
Bit rate                                 : 882 kb/s
Width                                    : 720 pixels
Height                                   : 480 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Bits/(Pixel*Frame)                       : 0.106
Stream size                              : 598 MiB (95%)
Default                                  : Yes
Forced                                   : No
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709


  


  I don't know if I need different command line options, or whether this might be an ffmpeg or Handbrake bug. It has taken many, many hours to generate these video files (VP9 is painfully slow to encode), so I hate to do a lot of this over again, especially doing it again encoding the video with ffmpeg instead of Handbrake, as Handbrake is (oddly enough, considering it uses ffmpeg under the hood) noticeably faster.

  


  I have no idea what these "Cues" are that ffmpeg wants and can't parse, or how I would change them.

  


• 12 ffmpeg xfade transitions : "option not found"

  17 juillet 2023, par nimda

  I'm running into a strange error where each of these following 12 of the 56 xfade transitions are throwing errors :

  


  

  • hlwind

  


  • hrwind

  


  • vuwind

  


  • vdwind

  


  • coverleft

  


  • coverright

  


  • coverup

  


  • coverdown

  


  • revealleft

  


  • revealright

  


  • revealup

  


  • revealdown

  


  


  I've tested all filter transitions with the following command, which is being generated by a nodeJS app with the fluent-ffmpeg library, and only the twelve listed above fail with the same error "option not found" :

  


  ffmpeg -f lavfi -t 169
  -i color=c=000000:s=960x540:r=30:duration=169
  -i file:///Users/johnbandy/Work/Projects/Active/CNCT/XFade/_assets/crosstrekvx-1.jpg
  -i file:///Users/johnbandy/Work/Projects/Active/CNCT/XFade/_assets/crosstrekvx-2.jpg 
  -filter_complex
    [1:v]format=pix_fmts=yuva420p,scale=w=4608:h=-1,zoompan=z='1.2+(0*(ot/4))':x='(on/(30*4))*(iw-iw/1.2)':y='(ih-ih/zoom)/2':d=120:s=960x540[1_up];
    [1_up]scale=w=960:h=-1[1_down];
    [2:v]format=pix_fmts=yuva420p,scale=w=4608:h=-1,zoompan=z='1.2+(0*(ot/4))':x='(on/(30*4))*(iw-iw/1.2)':y='(ih-ih/zoom)/2':d=120:s=960x540[2_up];
    [2_up]scale=w=960:h=-1[2_down];
    [1_down][2_down]xfade=transition=revealdown:duration=1:offset=3[2_out];
    [0:v][2_out]overlay=x=0:y=0:enable='lte(t,7)'[all_out]
  -vcodec libx264 -r 30 -f mp4 -map [all_out] -preset veryfast -crf 18 -movflags frag_keyframe+empty_moov -pix_fmt yuv420p all.mp4


  


  fflog output :

  


  ffmpeg version 6.0 Copyright (c) 2000-2023 the FFmpeg developers
  built with Apple clang version 14.0.3 (clang-1403.0.22.14.1)
  configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/6.0 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-audiotoolbox --enable-neon
  libavutil      58.  2.100 / 58.  2.100
  libavcodec     60.  3.100 / 60.  3.100
  libavformat    60.  3.100 / 60.  3.100
  libavdevice    60.  1.100 / 60.  1.100
  libavfilter     9.  3.100 /  9.  3.100
  libswscale      7.  1.100 /  7.  1.100
  libswresample   4. 10.100 /  4. 10.100
  libpostproc    57.  1.100 / 57.  1.100
Input #0, lavfi, from 'color=c=000000:s=960x540:r=30:duration=169':
  Duration: N/A, start: 0.000000, bitrate: N/A
  Stream #0:0: Video: wrapped_avframe, yuv420p, 960x540 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 30 tbn
Input #1, image2, from 'file:///Users/johnbandy/Work/Projects/Active/CNCT/XFade/_assets/crosstrekvx-1.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 36486 kb/s
  Stream #1:0: Video: mjpeg (Baseline), yuvj444p(pc, bt470bg/unknown/unknown), 960x540, 25 fps, 25 tbr, 25 tbn
Input #2, image2, from 'file:///Users/johnbandy/Work/Projects/Active/CNCT/XFade/_assets/crosstrekvx-2.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 35680 kb/s
  Stream #2:0: Video: mjpeg (Baseline), yuvj444p(pc, bt470bg/unknown/unknown), 960x540, 25 fps, 25 tbr, 25 tbn
[Parsed_xfade_8 @ 0x60000137cb00] [Eval @ 0x16f9b5348] Undefined constant or missing '(' in 'revealdown'
[Parsed_xfade_8 @ 0x60000137cb00] Unable to parse option value "revealdown"
Error applying option 'transition' to filter 'xfade': Option not found
Error initializing complex filters.
Option not found


  


  The fflog for a successful video generation follows (for comparison to the erroneous log above) :

  


  ffmpeg version 6.0 Copyright (c) 2000-2023 the FFmpeg developers
  built with Apple clang version 14.0.3 (clang-1403.0.22.14.1)
  configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/6.0 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-audiotoolbox --enable-neon
  libavutil      58.  2.100 / 58.  2.100
  libavcodec     60.  3.100 / 60.  3.100
  libavformat    60.  3.100 / 60.  3.100
  libavdevice    60.  1.100 / 60.  1.100
  libavfilter     9.  3.100 /  9.  3.100
  libswscale      7.  1.100 /  7.  1.100
  libswresample   4. 10.100 /  4. 10.100
  libpostproc    57.  1.100 / 57.  1.100
Input #0, lavfi, from 'color=c=000000:s=960x540:r=30:duration=169':
  Duration: N/A, start: 0.000000, bitrate: N/A
  Stream #0:0: Video: wrapped_avframe, yuv420p, 960x540 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 30 tbn
Input #1, image2, from 'file:///Users/johnbandy/Work/Projects/Active/CNCT/XFade/_assets/crosstrekvx-1.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 36486 kb/s
  Stream #1:0: Video: mjpeg (Baseline), yuvj444p(pc, bt470bg/unknown/unknown), 960x540, 25 fps, 25 tbr, 25 tbn
Input #2, image2, from 'file:///Users/johnbandy/Work/Projects/Active/CNCT/XFade/_assets/crosstrekvx-2.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 35680 kb/s
  Stream #2:0: Video: mjpeg (Baseline), yuvj444p(pc, bt470bg/unknown/unknown), 960x540, 25 fps, 25 tbr, 25 tbn
Stream mapping:
  Stream #0:0 (wrapped_avframe) -> overlay
  Stream #1:0 (mjpeg) -> format:default
  Stream #2:0 (mjpeg) -> format:default
  overlay:default -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
[swscaler @ 0x140158000] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x120098000] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x130078000] deprecated pixel format used, make sure you did set range correctly
    Last message repeated 2 times
[swscaler @ 0x140598000] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x1302d8000] deprecated pixel format used, make sure you did set range correctly
    Last message repeated 1 times
[libx264 @ 0x138e09080] using SAR=1/1
[libx264 @ 0x138e09080] using cpu capabilities: ARMv8 NEON
[libx264 @ 0x138e09080] profile High, level 3.1, 4:2:0, 8-bit
[libx264 @ 0x138e09080] 264 - core 164 r3095 baee400 - H.264/MPEG-4 AVC codec - Copyleft 2003-2022 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=2 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=12 lookahead_threads=4 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=1 open_gop=0 weightp=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=10 rc=crf mbtree=1 crf=18.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'all.mp4':
  Metadata:
    encoder         : Lavf60.3.100
  Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv420p(progressive), 960x540 [SAR 1:1 DAR 16:9], q=2-31, 30 fps, 15360 tbn
    Metadata:
      encoder         : Lavc60.3.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame=    0 fps=0.0 q=0.0 size=       0kB time=-577014:32:22.77 bitrate=  -0.0kbits/s speed=N/A    
frame=   32 fps=0.0 q=24.0 size=       0kB time=00:00:01.00 bitrate=   0.3kbits/s speed=1.94x    
frame=   87 fps= 84 q=24.0 size=       0kB time=00:00:02.83 bitrate=   0.1kbits/s speed=2.75x    
frame=  164 fps=107 q=24.0 size=       0kB time=00:00:05.40 bitrate=   0.1kbits/s speed=3.52x    
frame=  812 fps=399 q=24.0 size=     512kB time=00:00:26.96 bitrate= 155.5kbits/s speed=13.3x    
frame= 1821 fps=718 q=24.0 size=     512kB time=00:01:00.60 bitrate=  69.2kbits/s speed=23.9x    
frame= 2469 fps=813 q=24.0 size=     512kB time=00:01:22.23 bitrate=  51.0kbits/s speed=27.1x    
frame= 3421 fps=967 q=24.0 size=     512kB time=00:01:53.96 bitrate=  36.8kbits/s speed=32.2x    
frame= 4522 fps=1120 q=24.0 size=     768kB time=00:02:30.63 bitrate=  41.8kbits/s speed=37.3x    
frame= 5070 fps=1184 q=-1.0 Lsize=     812kB time=00:02:48.90 bitrate=  39.4kbits/s speed=39.5x    
video:769kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 5.626653%
[libx264 @ 0x138e09080] frame I:21    Avg QP: 2.73  size:  3710
[libx264 @ 0x138e09080] frame P:1305  Avg QP: 6.83  size:   449
[libx264 @ 0x138e09080] frame B:3744  Avg QP: 9.07  size:    33
[libx264 @ 0x138e09080] consecutive B-frames:  1.1%  1.4%  0.0% 97.5%
[libx264 @ 0x138e09080] mb I  I16..4: 95.4%  0.7%  3.8%
[libx264 @ 0x138e09080] mb P  I16..4:  0.1%  0.3%  0.1%  P16..4:  2.3%  0.2%  0.1%  0.0%  0.0%    skip:97.0%
[libx264 @ 0x138e09080] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.1%  0.0%  0.0%  direct: 0.1%  skip:99.8%  L0:70.9% L1:27.3% BI: 1.8%
[libx264 @ 0x138e09080] 8x8 transform intra:13.8% inter:71.9%
[libx264 @ 0x138e09080] coded y,uvDC,uvAC intra: 19.1% 12.6% 5.2% inter: 0.3% 0.5% 0.0%
[libx264 @ 0x138e09080] i16 v,h,dc,p: 94%  2%  4%  1%
[libx264 @ 0x138e09080] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  7% 41% 22%  2%  6%  2%  9%  3%  8%
[libx264 @ 0x138e09080] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 11% 32% 16%  2% 11%  4% 12%  3%  8%
[libx264 @ 0x138e09080] i8c dc,h,v,p: 88%  9%  2%  1%
[libx264 @ 0x138e09080] Weighted P-Frames: Y:1.6% UV:1.6%
[libx264 @ 0x138e09080] kb/s:37.25


  


• ffmpeg "Time code of first frame" not making sense [closed]

  23 janvier, par Kevin Vasko

  I can't seem to make sense of where ffmpeg is coming up with the "Time code of first frame" value.

  


  My original file that I am using.

  


  This video has the general timestamps of the original encoding date (aka the start time of the video the way I understanding it) and a duration of 8 min and 52s

  


  $ mediainfo GL0100002_output.mp4 
General
Complete name                            : GL0100002_output.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom (isom/iso2/avc1/mp41)
File size                                : 93.7 MiB
Duration                                 : 8 min 52 s
Overall bit rate                         : 1 476 kb/s
Encoded date                             : UTC 2022-02-23 15:18:42
Tagged date                              : UTC 2022-02-23 15:18:42
Writing application                      : Lavf58.29.100

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L3
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 4 frames
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 8 min 52 s
Bit rate                                 : 1 342 kb/s
Width                                    : 848 pixels
Height                                   : 480 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.138
Stream size                              : 85.2 MiB (91%)
Title                                    : GoPro AVC  
Writing library                          : x264 core 155 r2917 0a84d98
Encoding settings                        : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=12 / lookahead_threads=2 / 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=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=23.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Language                                 : English
Encoded date                             : UTC 2022-02-23 15:18:42
Tagged date                              : UTC 2022-02-23 15:18:42
Color range                              : Full
Codec configuration box                  : avcC

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 8 min 52 s
Bit rate mode                            : Constant
Bit rate                                 : 129 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 8.16 MiB (9%)
Title                                    : GoPro AAC  
Language                                 : English
Default                                  : Yes
Alternate group                          : 1
Encoded date                             : UTC 2022-02-23 15:18:42
Tagged date                              : UTC 2022-02-23 15:18:42

Other
ID                                       : 3
Type                                     : Time code
Format                                   : QuickTime TC
Duration                                 : 8 min 52 s
Frame rate                               : 23.976 (24000/1001) FPS
Time code of first frame                 : 15:57:41:15
Time code, striped                       : Yes
Title                                    : GoPro AVC  
Language                                 : English
Default                                  : No
Encoded date                             : UTC 2022-02-23 15:18:42
Tagged date                              : UTC 2022-02-23 15:18:42


  


  Now if I run

  


  ffmpeg -y -nostdin -v error -ss 00:00:00.042 -i GL0100002_output.mp4 -t 00:00:25.192 -map 0 -map -0:d -c:v libx264 -preset fast -crf 21 -c:a aac -sn GL0100002_test.DSME_0001.mp4

  


  I get the following mediainfo

  


  $ mediainfo GL0100002_test.DSME_0001.mp4 
General
Complete name                            : GL0100002_test.DSME_0001.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom (isom/iso2/avc1/mp41)
File size                                : 4.54 MiB
Duration                                 : 25 s 234 ms
Overall bit rate                         : 1 510 kb/s
Writing application                      : Lavf58.29.100

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L3
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 4 frames
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 25 s 234 ms
Bit rate                                 : 1 376 kb/s
Width                                    : 848 pixels
Height                                   : 480 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.141
Stream size                              : 4.14 MiB (91%)
Title                                    : GoPro AVC  
Writing library                          : x264 core 155 r2917 0a84d98
Encoding settings                        : cabac=1 / ref=2 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=6 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=12 / lookahead_threads=2 / 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=1 / open_gop=0 / weightp=1 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=30 / rc=crf / mbtree=1 / crf=21.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Language                                 : English
Color range                              : Full
Codec configuration box                  : avcC

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 25 s 214 ms
Duration_LastFrame                       : -3 ms
Bit rate mode                            : Constant
Bit rate                                 : 129 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 398 KiB (9%)
Title                                    : GoPro AAC  
Language                                 : English
Default                                  : Yes
Alternate group                          : 1

Other
ID                                       : 3
Type                                     : Time code
Format                                   : QuickTime TC
Duration                                 : 25 s 234 ms
Frame rate                               : 23.976 (24000/1001) FPS
Time code of first frame                 : 15:57:41:15
Time code, striped                       : Yes
Title                                    : GoPro AVC  
Language                                 : English
Default                                  : No


  


  But what I don't understand is where Time code of first frame is coming from. I would expect it would be 00:00:00.042 or even UTC 2022-02-23 15:18:42 + .042 but appear to be.

  


  Time code of first frame                 : 15:57:41:15


  


  Is this potentially clobbering together something to get this time that isn't obvious ?