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• ffmpeg : Strange behaviour with fade-in and fade-out in conjunction vs successively

  29 novembre 2023, par CEr

  I have a video file I want to fade in and out over a duration of three seconds each.

  


  My code is :

  


  ffmpeg -i video.mp4 -vf "fade=t=in:st=0:d=3,fade=t=out:st=169.288000:d=3" videofaded.mp4

  


  Expected behaviour : Fade from and to black over 3s.
What I get : No fade in at all but a fade out as specified.

  


  If I run ffmpeg -i video.mp4 -vf "fade=t=in:st=0:d=3" -c:a copy fadein.mp4 to juste fade in everything works as expected.

  


  Can anybody help my identify the problem ? I want to fade in and out in the same turn as there are a couple of videos to edit.

  


  Thanks,
Chris

  


  Here is my ffmpeg output :

  


  ffmpeg version 4.2.7-0ubuntu0.1 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
  configuration: --prefix=/usr --extra-version=0ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fffda8a7300] Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none, 1920x1080, 1087 kb/s): unspecified pixel format
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '20231106_Einfuehrung_Word_Mark_Fragen.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
  Duration: 00:02:52.29, start: 0.016000, bitrate: 1126 kb/s
    Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), none, 1920x1080, 1087 kb/s, 16 fps, 16 tbr, 10k tbn, 20k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 16000 Hz, mono, fltp, 72 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
File 'videofaded.mp4' already exists. Overwrite ? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x7fffda8c2c40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512
[libx264 @ 0x7fffda8c2c40] profile High, level 4.0
[libx264 @ 0x7fffda8c2c40] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: 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=24 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=2 keyint=250 keyint_min=16 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
Output #0, mp4, to 'videofaded.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
    Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1920x1080, q=-1--1, 16 fps, 16384 tbn, 16 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : Lavc58.54.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 16000 Hz, mono, fltp, 69 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc58.54.100 aac
frame= 2757 fps=273 q=-1.0 Lsize=   21394kB time=00:02:52.28 bitrate=1017.2kbits/s dup=92 drop=0 speed=17.1x
video:19842kB audio:1492kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.280957%
[libx264 @ 0x7fffda8c2c40] frame I:12    Avg QP:15.18  size:232156
[libx264 @ 0x7fffda8c2c40] frame P:1751  Avg QP:20.38  size:  9540
[libx264 @ 0x7fffda8c2c40] frame B:994   Avg QP:23.59  size:   832
[libx264 @ 0x7fffda8c2c40] consecutive B-frames: 40.7% 29.5% 13.1% 16.8%
[libx264 @ 0x7fffda8c2c40] mb I  I16..4: 44.5% 15.6% 39.9%
[libx264 @ 0x7fffda8c2c40] mb P  I16..4:  0.5%  0.2%  0.2%  P16..4:  9.3%  1.1%  1.0%  0.0%  0.0%    skip:87.8%
[libx264 @ 0x7fffda8c2c40] mb B  I16..4:  0.1%  0.1%  0.0%  B16..8:  6.2%  0.2%  0.1%  direct: 0.1%  skip:93.1%  L0:31.0% L1:66.2% BI: 2.9%
[libx264 @ 0x7fffda8c2c40] 8x8 transform intra:20.6% inter:17.2%
[libx264 @ 0x7fffda8c2c40] coded y,uvDC,uvAC intra: 40.5% 40.6% 18.4% inter: 3.2% 2.1% 0.3%
[libx264 @ 0x7fffda8c2c40] i16 v,h,dc,p: 40% 33%  8% 19%
[libx264 @ 0x7fffda8c2c40] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36% 14% 43%  2%  1%  1%  1%  1%  2%
[libx264 @ 0x7fffda8c2c40] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 37% 32% 15%  2%  3%  3%  3%  3%  3%
[libx264 @ 0x7fffda8c2c40] i8c dc,h,v,p: 56% 20% 19%  5%
[libx264 @ 0x7fffda8c2c40] Weighted P-Frames: Y:0.7% UV:0.7%
[libx264 @ 0x7fffda8c2c40] ref P L0: 85.4%  5.7%  6.2%  2.7%  0.0%
[libx264 @ 0x7fffda8c2c40] ref B L0: 79.1% 18.3%  2.6%
[libx264 @ 0x7fffda8c2c40] ref B L1: 96.6%  3.4%
[libx264 @ 0x7fffda8c2c40] kb/s:943.30
[aac @ 0x7fffda8f1e00] Qavg: 18927.953


  


• Extract all audio from a mov file into a aac file [closed]

  5 février 2024, par Sushrut Kaul

  I have a video which contains several streams as shown below :

  


  Stream #0:0[0x1](eng): Video: prores (XQ) (ap4x / 0x78347061), yuv444p12le(bt709/smpte432/smpte2084, progressive), 3840x2160, 1222881 kb/s, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 24k tbn (default)
    Metadata:
      creation_time   : 2022-08-26T22:20:26.000000Z
      handler_name    : Apple Video Media Handler
      vendor_id       : appl
      encoder         : Apple ProRes 4444 XQ
      timecode        : 00:59:59:00
    Side data:
      Content Light Level Metadata, MaxCLL=726, MaxFALL=93
  Stream #0:1[0x2](eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (FL), s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2022-08-26T22:20:26.000000Z
      handler_name    : Apple Sound Media Handler
      vendor_id       : [0][0][0][0]
  Stream #0:2[0x3](eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (FR), s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2022-08-26T22:20:26.000000Z
      handler_name    : Apple Sound Media Handler
      vendor_id       : [0][0][0][0]
  Stream #0:3[0x4](eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2022-08-26T22:20:26.000000Z
      handler_name    : Apple Sound Media Handler
      vendor_id       : [0][0][0][0]
  Stream #0:4[0x5](eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (LFE), s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2022-08-26T22:20:26.000000Z
      handler_name    : Apple Sound Media Handler
      vendor_id       : [0][0][0][0]
  Stream #0:5[0x6](eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (BL), s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2022-08-26T22:20:26.000000Z
      handler_name    : Apple Sound Media Handler
      vendor_id       : [0][0][0][0]
  Stream #0:6[0x7](eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (BR), s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2022-08-26T22:20:26.000000Z
      handler_name    : Apple Sound Media Handler
      vendor_id       : [0][0][0][0]
  Stream #0:7[0x8](eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (DL), s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2022-08-26T22:20:26.000000Z
      handler_name    : Apple Sound Media Handler
      vendor_id       : [0][0][0][0]
  Stream #0:8[0x9](eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (DR), s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2022-08-26T22:20:26.000000Z
      handler_name    : Apple Sound Media Handler
      vendor_id       : [0][0][0][0]


  


  As you can see, these audio streams are single channel as each stream is mapping to a unique channel.

  


  I want to combine these audio streams into a aac file such that the output has the channel information retained.

  


  I use the following command to do this :

  


  ffmpeg -i -filter _complex "[0:a:0][0:a:1][0:a:2][0:a:3][0:a:4][0:a:5][0:a:6][0:a:7]join=inputs=8:channel_layout=7.1[aout]" -map "[aout]" -c:a aac output_audio_join.aac

  


  The individual audio streams were having a duration of duration=103.728625 seconds.

  


  The output however is 862.207660 seconds. Why ?

  


• vcpkg error : BUILD_FAILED when "Getting CMake variables for x64-windows"

  24 août 2024, par Rok Benko

  I'm trying to install ffmpeg via vcpkg on Windows by running the following command :

  


  vcpkg.exe install ffmpeg

  


  The installation throws an error when getting CMake variables for x64-windows.

  


  -- Getting CMake variables for x64-windows
CMake Error at scripts/cmake/vcpkg_execute_required_process.cmake:127 (message):
    Command failed: "C:/Program Files/Microsoft Visual Studio/2022/Community/Common7/IDE/CommonExtensions/Microsoft/CMake/Ninja/ninja.exe" -v
    Working Directory: C:/Users/xxxxx/vcpkg/buildtrees/pkgconf/x64-windows-rel/vcpkg-parallel-configure
    Error code: 1
    See logs for more information:
      C:\Users\xxxxx\vcpkg\buildtrees\pkgconf\cmake-get-vars-x64-windows-dbg-CMakeCache.txt.log
      C:\Users\xxxxx\vcpkg\buildtrees\pkgconf\cmake-get-vars-x64-windows-rel-CMakeCache.txt.log
      C:\Users\xxxxx\vcpkg\buildtrees\pkgconf\cmake-get-vars-x64-windows-dbg-CMakeConfigureLog.yaml.log
      C:\Users\xxxxx\vcpkg\buildtrees\pkgconf\cmake-get-vars-x64-windows-rel-CMakeConfigureLog.yaml.log
      C:\Users\xxxxx\vcpkg\buildtrees\pkgconf\cmake-get-vars-x64-windows-out.log

Call Stack (most recent call first):
  installed/x64-windows/share/vcpkg-cmake/vcpkg_cmake_configure.cmake:269 (vcpkg_execute_required_process)
  installed/x64-windows/share/vcpkg-cmake-get-vars/vcpkg_cmake_get_vars.cmake:15 (vcpkg_cmake_configure)
  installed/x64-windows/share/vcpkg-tool-meson/vcpkg_configure_meson.cmake:323 (vcpkg_cmake_get_vars)
  installed/x64-windows/share/vcpkg-tool-meson/vcpkg_configure_meson.cmake:458 (vcpkg_generate_meson_cmd_args)
  ports/pkgconf/portfile.cmake:9 (vcpkg_configure_meson)
  scripts/ports.cmake:192 (include)


error: building pkgconf:x64-windows failed with: BUILD_FAILED
See https://learn.microsoft.com/vcpkg/troubleshoot/build-failures?WT.mc_id=vcpkg_inproduct_cli for more information.
Elapsed time to handle pkgconf:x64-windows: 1.9 s
Please ensure you're using the latest port files with `git pull` and `vcpkg update`.
Then check for known issues at:
  https://github.com/microsoft/vcpkg/issues?q=is%3Aissue+is%3Aopen+in%3Atitle+pkgconf
You can submit a new issue at:
  https://github.com/microsoft/vcpkg/issues/new?title=xxxxx


  


  What does this error mean ? The suggested git pull and vcpkg update didn't solve the error. The directory is up to date.

  


  PS : I opened logs, but I have no idea how to solve the error. I don't understand them.