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• animated webp only has key frame？

  23 février 2024, par Feilong Luo

  I want to cover a mp4 to animated webp, so I use the following ffmpeg command :

  


  My mp4 file is from http://myvideodata.oss-cn-shenzhen.aliyuncs.com/crs_bcb3f246273d4dbb8ec7f93239fbea6e.mp4

  


  ffmpeg -i ./test.mp4 test.webp


  


  It is ok, and animated webp has been created, so I use webpinfo tool (downloaded from https://developers.google.com/speed/webp/download and build example in it, or use this one http://myvideodata.oss-cn-shenzhen.aliyuncs.com/webpinfo)

  


  webpinfo test.webp


  


  and get information like this :

  


  RIFF HEADER:
  File size: 1968244
Chunk VP8X at offset     12, length     18
  ICCP: 0
  Alpha: 1
  EXIF: 0
  XMP: 0
  Animation: 1
  Canvas size 362 x 330
Chunk ANIM at offset     30, length     14
  Background color:(ARGB) ff ff ff ff
  Loop count      : 1
Chunk ANMF at offset     44, length  25116
  Offset_X: 0
  Offset_Y: 0
  Width: 362
  Height: 330
  Duration: 42
  Dispose: 0
  Blend: 0
Chunk VP8  at offset     68, length  25092
  Width: 362
  Height: 330
  Alpha: 0
  Animation: 0
  Format: Lossy (1)


  


  Every frame size is about 25k, my question is : all frames in animated webp are key frames ?

  


  Can anyone help ?

  


• ffmpeg amix filter on mp3 with image

  20 novembre 2018, par cutoffurmind

  I use ffmpeg to concatenate 2 mp3 files with amix filter (see full log).

  It works fine for mp3 files without any meta but it fails with mp3 files with cover image in meta, result file length is less then 1 second.

  How could I fix it in same command ?

  Here is full log :

  localhost:Music user$ ffmpeg -i input.mp3 -i /opt/docker/tag_long.mp3 -filter_complex amix=inputs=2:duration=shortest,volume=2 -codec:a libmp3lame -q:a 5  out.mp3 -report
  
  ffmpeg started on 2018-11-11 at 13:19:50
  
  Report written to "ffmpeg-20181111-131950.log"
  
  ffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gpl --enable-libmp3lame --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-opencl --enable-videotoolbox
  
    libavutil      56. 22.100 / 56. 22.100
  
    libavcodec     58. 35.100 / 58. 35.100
  
    libavformat    58. 20.100 / 58. 20.100
  
    libavdevice    58.  5.100 / 58.  5.100
  
    libavfilter     7. 40.101 /  7. 40.101
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100
  
  [mp3 @ 0x7fe506000000] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, mp3, from 'input.mp3':
  
    Metadata:
  
      artist          : Paul
  
      album           : Underground Vol. 17
  
      title           : Crazy
  
      track           : 11/20
  
      date            : 2017
  
    Duration: 00:04:46.23, start: 0.000000, bitrate: 324 kb/s
  
      Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 320 kb/s
  
      Stream #0:1: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 500x500 [SAR 1:1 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
  
      Metadata:
  
        comment         : Cover (front)
  
  [mp3 @ 0x7fe50601aa00] Estimating duration from bitrate, this may be inaccurate
  
  Input #1, mp3, from '/opt/docker/tag_long.mp3':
  
    Metadata:
  
      genre           : Blues
  
      id3v2_priv.XMP  : &lt;?xpacket begin="\xef\xbb\xbf" id="W5M0MpCehiHzreSzNTczkc9d"?>\x0a\x0a \x0a  <rdf 128="128" kb="kb"></rdf>s
  
      Stream #1:0: Audio: mp3, 44100 Hz, stereo, fltp, 128 kb/s
  
  File 'out.mp3' already exists. Overwrite ? [y/N] Y
  
  Stream mapping:
  
    Stream #0:0 (mp3float) -> amix:input0 (graph 0)
  
    Stream #1:0 (mp3float) -> amix:input1 (graph 0)
  
    volume (graph 0) -> Stream #0:0 (libmp3lame)
  
    Stream #0:1 -> #0:1 (mjpeg (native) -> png (native))
  
  Press [q] to stop, [?] for help
  
  [swscaler @ 0x7fe506045000] deprecated pixel format used, make sure you did set range correctly
  
  [mp3 @ 0x7fe507810000] Frame rate very high for a muxer not efficiently supporting it.
  
  Please consider specifying a lower framerate, a different muxer or -vsync 2
  
  Output #0, mp3, to 'out.mp3':
  
    Metadata:
  
      TPE1            : Paul
  
      TALB            : Underground Vol. 17
  
      TIT2            : Crazy
  
      TRCK            : 11/20
  
      TDRC            : 2017
  
      TSSE            : Lavf58.20.100
  
      Stream #0:0: Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
  
      Metadata:
  
        encoder         : Lavc58.35.100 libmp3lame
  
      Stream #0:1: Video: png, rgb24(progressive), 500x500 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
  
      Metadata:
  
        comment         : Cover (front)
  
        encoder         : Lavc58.35.100 png
  
  frame=    1 fps=0.0 q=-0.0 Lsize=     496kB time=00:00:00.26 bitrate=15501.4kbits/s speed=0.336x    
  
  video:495kB audio:1kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.084876%

• 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