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• ffmpeg No such filter : 'palettegen' in linux

  29 juillet 2016, par royise

  1.

  my system 
  
  uname -a
  
  Linux localhost.localdomain 2.6.32-220.el6.x86_64 #1 SMP Tue Dec 6 19:48:22 GMT 2011 x86_64 x86_64 x86_64 GNU/Linux

  2.ffmpeg is download from
  http://johnvansickle.com/ffmpeg/

  3.I had download the ffmpeg-release-64bit-static.tar.xz ,unpackage this file, and run : ./ffmpeg
  then ffmpeg has installed. I check it by using : ffmpeg -version
  no problems.

  I run those command in my system is no problem :
  

  cd /home/web/tomcat-6.0.29/zhouletest/ffmpeg-3.1.1-64bit-static 
  
  
  
  ./ffmpeg -y -ss 10 -t 3 -i /home/web/tomcat-6.0.29/zhouletest/videos/6.mp4 -vf fps=10,scale=177:-1:flags=lanczos,palettegen /home/web/tomcat-6.0.29/zhouletest/gif_images/palettegens/6.png 
  
  
  
  ./ffmpeg -y -ss 10 -t 3 -i /home/web/tomcat-6.0.29/zhouletest/videos/6.mp4 -i /home/web/tomcat-6.0.29/zhouletest/gif_images/palettegens/6.png -filter_complex "fps=10,scale=177:-1:flags=lanczos[x];[x][1:v]paletteuse" /home/web/tomcat-6.0.29/zhouletest/gif_images/6.gif

  but when I invoke this command in java, errors happend, why ?
  

  String cmd1 = "/home/web/tomcat-6.0.29/zhouletest/ffmpeg -y -ss 10 -t 3 -i /home/web/tomcat-6.0.29/zhouletest/videos/6.mp4 -vf fps=10,scale=177:-1:flags=lanczos,palettegen /home/web/tomcat-6.0.29/zhouletest/gif_images/palettegens/6.png";
  
  String cmd2 = "/home/web/tomcat-6.0.29/zhouletest/ffmpeg-3.1.1-64bit-static/ffmpeg -y -ss 10 -t 3 -i /home/web/tomcat-6.0.29/zhouletest/videos/6.mp4 -i /home/web/tomcat-6.0.29/zhouletest/gif_images/palettegens/6.png -filter_complex \"fps=10,scale=177:-1:flags=lanczos[x];[x][1:v]paletteuse\" /home/web/tomcat-6.0.29/zhouletest/gif_images/6.gif";
  
  
  
  String result1 = executeCommand(cmd1);
  
  String result2 = executeCommand(cmd2);
  
  
  
  private static String executeCommand(String command) {
  
      StringBuffer output = new StringBuffer();
  
      Process p;
  
      try {
  
          p = Runtime.getRuntime().exec(command);
  
          p.waitFor();
  
          BufferedReader reader = new BufferedReader(new InputStreamReader(p.getErrorStream()));
  
  
  
          String line = "";
  
          while ((line = reader.readLine())!= null) {
  
              output.append(line + "\n");
  
          }
  
  
  
      } catch (Exception e) {
  
          e.printStackTrace();
  
      }
  
      return output.toString();
  
  }

  errors :

  result1 :
  result2:ffmpeg version 3.1.1-static
  http://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2016 the FFmpeg
  developers
  built with gcc 5.4.0 (Debian 5.4.0-4) 20160609
  configuration : —enable-gpl —enable-version3 —enable-static
  —disable-debug —enable-libmp3lame —enable-libx264 —enable-libx265 —enable-libwebp —enable-libspeex —enable-libvorbis —enable-libvpx —enable-libfreetype —enable-fontconfig —enable-libxvid —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libtheora —enable-libvo-amrwbenc —enable-gray —enable-libopenjpeg —enable-libopus —enable-libass —enable-gnutls —enable-libvidstab —enable-libsoxr —enable-frei0r —enable-libfribidi —disable-indev=sndio —disable-outdev=sndio —enable-librtmp —enable-libmfx —enable-libzimg —cc=gcc
  libavutil 55. 28.100 / 55. 28.100
  libavcodec 57.
  48.101 / 57. 48.101
  libavformat 57. 41.100 / 57. 41.100
  libavdevice 57. 0.101 / 57. 0.101
  libavfilter
  6. 47.100 / 6. 47.100
  libswscale 4. 1.100 / 4. 1.100
  libswresample 2. 1.100 / 2. 1.100
  libpostproc
  54. 0.100 / 54. 0.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from ’/home/web/tomcat-6.0.29/zhouletest/videos/6.mp4’ :
  Metadata :
  
  major_brand : isom
  minor_version : 512
  compatible_brands : isomiso2avc1mp41
  encoder : Lavf56.40.101
  Duration : 00:04:36.64, start : -3.338000, bitrate : 1089 kb/s
  Stream #0:0(und) : Video : h264 (Main) (avc1 / 0x31637661), yuv420p, 480x360, 997 kb/s, 15 fps, 15 tbr, 16k tbn, 30 tbc (default)
  Metadata :
  handler_name : VideoHandler
  Stream #0:1(und) : Audio : aac (Main) (mp4a / 0x6134706D), 22050 Hz, stereo, fltp, 88 kb/s (default)
  Metadata :
  handler_name : SoundHandler
  Input #1, png_pipe, from ’/home/web/tomcat-6.0.29/zhouletest/gif_images/palettegens/6.png’ :
  
  Duration : N/A, bitrate : N/A
  Stream #1:0 : Video : png, rgba(pc), 16x16 [SAR 1:1 DAR 1:1], 25 tbr, 25 tbn, 25 tbc
  [AVFilterGraph @ 0x45c5260] No such filter :
  ’"fps’
  Error initializing complex filters.
  Invalid
  argument
  

• Encoding RGB to MPEG too Slow

  26 avril 2018, par tkellehe

  Encoding RGB to MPEG too Slow

  Hello, I am using the ffmpeg C++ library to encode raw RGBA32 video data into MPEG. I first use sws_scale to get the raw RGBA32 video data into YUV420p. From there, I take that buffer and encode it using the avcodec_encode_video2 function. Everything works/looks fine (except I am not too excited about the loss in quality from the two jumps), but what is really bothering me is that it takes about 8ms for the first step and another 8ms for the next step (best case). And this is per frame ! This means that with a FPS of 60 it takes at least the length of the recording to get it into MPEG !

  My Question

  Is there a format to encode to that does not cause me to take forever and a day to encode into ? If so, is there a C++ library to do this such as ffmpeg ?

• How do I properly link ffmpeg using CMake in my Flutter plugin on Linux ?

  7 avril 2022, par GroovinChip

  I've written a Flutter plugin for Linux that uses ffmpeg and I'm having trouble building my example app that uses the plugin. I keep getting errors that there are no matching calls to several ffmpeg functions, which I can actually click into and see. Why is this happening and what can I do to fix it ?

  


  Here is my plugin's CMakeLists.txt :

  


  cmake_minimum_required(VERSION 3.10)
set(PROJECT_NAME "thumblr_linux")
project(${PROJECT_NAME} LANGUAGES CXX)

# This value is used when generating builds using this plugin, so it must
# not be changed
set(PLUGIN_NAME "thumblr_linux_plugin")

add_subdirectory(FFmpeg)

add_library(${PLUGIN_NAME} SHARED
  "thumblr_linux_plugin.cc"
)
apply_standard_settings(${PLUGIN_NAME})
set_target_properties(${PLUGIN_NAME} PROPERTIES
  CXX_VISIBILITY_PRESET hidden)
target_compile_definitions(${PLUGIN_NAME} PRIVATE FLUTTER_PLUGIN_IMPL)
target_include_directories(${PLUGIN_NAME} INTERFACE
  "${CMAKE_CURRENT_SOURCE_DIR}/include")
target_link_libraries(${PLUGIN_NAME} PRIVATE flutter)
target_link_libraries(${PLUGIN_NAME} PRIVATE PkgConfig::GTK FFmpgeg)

# List of absolute paths to libraries that should be bundled with the plugin
set(thumblr_linux_bundled_libraries
  ""
  PARENT_SCOPE
)


  


  and here is my FFmpeg/CMakeLists.txt :

  


  cmake_minimum_required(VERSION 3.14)
project(FFmpeg)

find_package(PkgConfig REQUIRED)
pkg_check_modules(AVCODEC     REQUIRED IMPORTED_TARGET libavcodec)
pkg_check_modules(AVFORMAT    REQUIRED IMPORTED_TARGET libavformat)
pkg_check_modules(AVFILTER    REQUIRED IMPORTED_TARGET libavfilter)
pkg_check_modules(AVDEVICE    REQUIRED IMPORTED_TARGET libavdevice)
pkg_check_modules(AVUTIL      REQUIRED IMPORTED_TARGET libavutil)
pkg_check_modules(SWRESAMPLE  REQUIRED IMPORTED_TARGET libswresample)
pkg_check_modules(SWSCALE     REQUIRED IMPORTED_TARGET libswscale)

add_library(FFmpeg INTERFACE IMPORTED GLOBAL)

target_link_libraries(FFmpeg INTERFACE
    PkgConfig::AVCODEC
    PkgConfig::AVFORMAT
    PkgConfig::AVFILTER
    PkgConfig::AVDEVICE
    PkgConfig::AVUTIL
    PkgConfig::SWRESAMPLE
    PkgConfig::SWSCALE
)


  


  and here are the error messages I get when building :

  


  /home/parallels/flutter_projects/thumblr/thumblr_linux/example/linux/flutter/ephemeral/.plugin_symlinks/thumblr_linux/linux/thumblr_linux_plugin.cc:80:9: error: no matching function for call to 'avformat_open_input'
/home/parallels/flutter_projects/thumblr/thumblr_linux/example/linux/flutter/ephemeral/.plugin_symlinks/thumblr_linux/linux/thumblr_linux_plugin.cc:84:9: error: no matching function for call to 'avformat_find_stream_info'
/home/parallels/flutter_projects/thumblr/thumblr_linux/example/linux/flutter/ephemeral/.plugin_symlinks/thumblr_linux/linux/thumblr_linux_plugin.cc:88:5: error: no matching function for call to 'av_dump_format'
/home/parallels/flutter_projects/thumblr/thumblr_linux/example/linux/flutter/ephemeral/.plugin_symlinks/thumblr_linux/linux/thumblr_linux_plugin.cc:102:61: error: assigning to 'AVCodecContext *' from incompatible type 'AVCodecParameters *'
/home/parallels/flutter_projects/thumblr/thumblr_linux/example/linux/flutter/ephemeral/.plugin_symlinks/thumblr_linux/linux/thumblr_linux_plugin.cc:111:9: error: use of undeclared identifier 'avcodec_open'
/home/parallels/flutter_projects/thumblr/thumblr_linux/example/linux/flutter/ephemeral/.plugin_symlinks/thumblr_linux/linux/thumblr_linux_plugin.cc:119:14: error: use of undeclared identifier 'avcodec_alloc_frame'
/home/parallels/flutter_projects/thumblr/thumblr_linux/example/linux/flutter/ephemeral/.plugin_symlinks/thumblr_linux/linux/thumblr_linux_plugin.cc:122:17: error: use of undeclared identifier 'avcodec_alloc_frame'
/home/parallels/flutter_projects/thumblr/thumblr_linux/example/linux/flutter/ephemeral/.plugin_symlinks/thumblr_linux/linux/thumblr_linux_plugin.cc:127:16: error: no matching function for call to 'atk_image_get_image_size'
/home/parallels/flutter_projects/thumblr/thumblr_linux/example/linux/flutter/ephemeral/.plugin_symlinks/thumblr_linux/linux/thumblr_linux_plugin.cc:133:5: error: use of undeclared identifier 'av_image_fill_arrays'
/home/parallels/flutter_projects/thumblr/thumblr_linux/example/linux/flutter/ephemeral/.plugin_symlinks/thumblr_linux/linux/thumblr_linux_plugin.cc:144:9: error: use of undeclared identifier 'avcodec_decode_video'
/home/parallels/flutter_projects/thumblr/thumblr_linux/example/linux/flutter/ephemeral/.plugin_symlinks/thumblr_linux/linux/thumblr_linux_plugin.cc:179:15: error: unused variable 'ret' [-Werror,-Wunused-variable]
/home/parallels/flutter_projects/thumblr/thumblr_linux/example/linux/flutter/ephemeral/.plugin_symlinks/thumblr_linux/linux/thumblr_linux_plugin.cc:211:5: error: no matching function for call to 'avformat_close_input'


  


  the C++ code for the plugin itself can be found here : https://github.com/GroovinChip/thumblr/blob/main/thumblr_linux/linux/thumblr_linux_plugin.cc