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• ffmpeg not generating palettes

  2 décembre 2018, par sk84z

  I downloaded ffmpeg and ran the command found in the documentation to generate palettes :

  ffmpeg -i input.mkv -vf palettegen palette.png

  The only difference being my input was input.mp4 instead of input.mkv.

  No file gets generated. Here’s the console output from PowerShell :

  ffmpeg version 3.4 Copyright (c) 2000-2017 the FFmpeg developers  
  
    built with gcc 7.2.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth --enable-libmfx
  
    libavutil      55. 78.100 / 55. 78.100
  
    libavcodec     57.107.100 / 57.107.100
  
    libavformat    57. 83.100 / 57. 83.100
  
    libavdevice    57. 10.100 / 57. 10.100
  
    libavfilter     6.107.100 /  6.107.100
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
    libpostproc    54.  7.100 / 54.  7.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: mp41isom
  
      creation_time   : 2018-11-23T23:27:38.000000Z
  
    Duration: 00:00:09.98, start: 0.000000, bitrate: 2784 kb/s
  
      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 580x328 [SAR 1:1 DAR 145:82], 2699 kb/s, 30 fps, 30 tbr, 30k tbn, 60 tbc (default)
  
      Metadata:
  
        creation_time   : 2018-11-23T23:27:38.000000Z
  
        handler_name    : VideoHandler
  
        encoder         : AVC Coding
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 79 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-11-23T23:27:38.000000Z
  
        handler_name    : SoundHandler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> png (native))
  
  Press [q] to stop, [?] for help
  
  Output #0, image2, to 'palette.png':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: mp41isom
  
      encoder         : Lavf57.83.100
  
      Stream #0:0(und): Video: png, rgba, 16x16 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 30 fps, 30 tbn, 30 tbc (default)
  
      Metadata:
  
        creation_time   : 2018-11-23T23:27:38.000000Z
  
        handler_name    : VideoHandler
  
        encoder         : Lavc57.107.100 png
  
  [Parsed_palettegen_0 @ 00000296510def00] 255(+1) colors generated out of 285516 colors; ratio=0.000893
  
  [Parsed_palettegen_0 @ 00000296510def00] Dupped color: FF000001

  Any ideas ?

• Having issues with kdenlive screen capture mode

  5 décembre 2018, par brianH

  Am running new repository install of kdenlive on ubuntu 18.04 after having similar problem on 16.04 but the problem persists "failed to start the capture application" when i start in screen capture mode. This problem was also present when I used kdenlive appImages.
  The current kdenlive version is 17.12.3 and i’ve tried changing kdenlive config settings, switching to default settings etc. also cleaned the /.cache/kdenlive file ..

  Ironically, when I use gdb kdenlive then run, the capture device works. Although then there is a separate issue of playing the video with the project monitor.

  On the previous 16.04 build had an addition log message that libvorbis was not recognized when the capture application failed.

  I had purged, autoremove packages and Resinstalled, also reinstalled ffmpeg and the installed libvorbis packages.
  Running ffmpeg gives :
  ffmpeg version 3.4.4-0ubuntu0.18.04.1 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
  configuration : —prefix=/usr —extra-version=0ubuntu0.18.04.1 —toolchain=hardened —libdir=/usr/lib/x86_64-linux-gnu —incdir=/usr/include/x86_64-linux-gnu —enable-gpl —disable-stripping —enable-avresample —enable-avisynth —enable-gnutls —enable-ladspa —enable-libass —enable-libbluray —enable-libbs2b —enable-libcaca —enable-libcdio —enable-libflite —enable-libfontconfig —enable-libfreetype —enable-libfribidi —enable-libgme —enable-libgsm —enable-libmp3lame —enable-libmysofa —enable-libopenjpeg —enable-libopenmpt —enable-libopus —enable-libpulse —enable-librubberband —enable-librsvg —enable-libshine —enable-libsnappy —enable-libsoxr —enable-libspeex —enable-libssh —enable-libtheora —enable-libtwolame —enable-libvorbis —enable-libvpx —enable-libwavpack —enable-libwebp —enable-libx265 —enable-libxml2 —enable-libxvid —enable-libzmq —enable-libzvbi —enable-omx —enable-openal —enable-opengl —enable-sdl2 —enable-libdc1394 —enable-libdrm —enable-libiec61883 —enable-chromaprint —enable-frei0r —enable-libopencv —enable-libx264 —enable-shared
  libavutil 55. 78.100 / 55. 78.100
  libavcodec 57.107.100 / 57.107.100
  libavformat 57. 83.100 / 57. 83.100
  libavdevice 57. 10.100 / 57. 10.100
  libavfilter 6.107.100 / 6.107.100
  libavresample 3. 7. 0 / 3. 7. 0
  libswscale 4. 8.100 / 4. 8.100
  libswresample 2. 9.100 / 2. 9.100
  libpostproc 54. 7.100 / 54. 7.100

  Any thoughts on this ?

• FFMPEG adds extra contents to the beginning of the file, when converting OGG audio to MP3

  3 décembre 2018, par PBM

  I use the following ffmpeg -i   to convert ogg music files to mp3. I, however, realized that the resulting mp3 files on some ogg files are slightly longer, and includes the repetition of the first half a second of the original file in the beginning. (Which is quite annoying when listening to the MP3s).

  Anybody else faced similar issues ?

  FYI, I am using ffmpeg version 4.0.3, which uses libmp3lame as the encoder for MP3 output.

  ---

  As requested in the comments, here is the full log of @ffmpeg@

  $ ffmpeg -i track.ogg track.mp3
  
  ffmpeg version 4.0.3 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 8 (GCC)
  
    configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --docdir=/usr/share/doc/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection' --extra-ldflags='-Wl,-z,relro -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld ' --extra-cflags=' ' --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-version3 --enable-bzlib --disable-crystalhd --enable-fontconfig --enable-frei0r --enable-gcrypt --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libcdio --enable-libdrm --enable-indev=jack --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libmp3lame --enable-nvenc --enable-openal --enable-opencl --enable-opengl --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librsvg --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvidstab --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzvbi --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-libmfx --enable-runtime-cpudetect
  
    libavutil      56. 14.100 / 56. 14.100
  
    libavcodec     58. 18.100 / 58. 18.100
  
    libavformat    58. 12.100 / 58. 12.100
  
    libavdevice    58.  3.100 / 58.  3.100
  
    libavfilter     7. 16.100 /  7. 16.100
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  1.100 /  5.  1.100
  
    libswresample   3.  1.100 /  3.  1.100
  
    libpostproc    55.  1.100 / 55.  1.100
  
  Input #0, ogg, from 'track.ogg':
  
    Duration: 00:04:47.11, start: 0.000000, bitrate: 112 kb/s
  
      Stream #0:0: Audio: vorbis, 44100 Hz, stereo, fltp, 112 kb/s
  
      Metadata:
  
        ARTIST          : artist
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (vorbis (native) -> mp3 (libmp3lame))
  
  Press [q] to stop, [?] for help
  
  Output #0, mp3, to 'track.mp3':
  
    Metadata:
  
      TSSE            : Lavf58.12.100
  
      Stream #0:0: Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp
  
      Metadata:
  
        ARTIST          : artist
  
        encoder         : Lavc58.18.100 libmp3lame
  
  [ogg @ 0x5645711ebdc0] Invalid picture type: -2555935.
  
  [ogg @ 0x5645711ebdc0] Could not read mimetype from an attached picture.
  
  [ogg @ 0x5645711ebdc0] Invalid picture type: -2555935.
  
  [ogg @ 0x5645711ebdc0] Could not read mimetype from an attached picture.
  
  size=    4497kB time=00:04:47.79 bitrate= 128.0kbits/s speed=50.8x    
  
  video:0kB audio:4497kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.005494%

  Something that is strange is the error message Invalid picture type whereas the ogg file does not contain any cover-art photo. And to see the difference of the lengths :

  $ soxi -D track.ogg 
  
  287.111837
  
  $ soxi -D track.mp3 
  
  287.817007