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• lavc : VP9 decoder

  1er octobre 2013, par Ronald S. Bultje

  lavc : VP9 decoder
  Originally written by Ronald S. Bultje <rsbultje@gmail.com> and
  
  Clément Bœsch <u@pkh.me>
  Further contributions by :
  
  Anton Khirnov <anton@khirnov.net>
  
  Diego Biurrun <diego@biurrun.de>
  
  Luca Barbato <lu_zero@gentoo.org>
  
  Martin Storsjö <martin@martin.st>
  Signed-off-by : Luca Barbato <lu_zero@gentoo.org>
  
  Signed-off-by : Anton Khirnov <anton@khirnov.net>
  

  • [DH] Changelog
  • [DH] configure
  • [DH] doc/general.texi
  • [DH] libavcodec/Makefile
  • [DH] libavcodec/allcodecs.c
  • [DH] libavcodec/version.h
  • [DH] libavcodec/vp9.c
  • [DH] libavcodec/vp9.h
  • [DH] libavcodec/vp9block.c
  • [DH] libavcodec/vp9data.c
  • [DH] libavcodec/vp9data.h
  • [DH] libavcodec/vp9dsp.c
  • [DH] libavcodec/vp9mvs.c
  • [DH] libavcodec/vp9prob.c
  • [DH] libavcodec/x86/Makefile
  • [DH] libavcodec/x86/vp9dsp.asm
  • [DH] libavcodec/x86/vp9dsp_init.c
  • [DH] tests/fate/vpx.mak
  • [DH] tests/ref/fate/vp9-00-quantizer-00
  • [DH] tests/ref/fate/vp9-00-quantizer-01
  • [DH] tests/ref/fate/vp9-00-quantizer-02
  • [DH] tests/ref/fate/vp9-00-quantizer-03
  • [DH] tests/ref/fate/vp9-00-quantizer-04
  • [DH] tests/ref/fate/vp9-00-quantizer-05
  • [DH] tests/ref/fate/vp9-00-quantizer-06
  • [DH] tests/ref/fate/vp9-00-quantizer-07
  • [DH] tests/ref/fate/vp9-00-quantizer-08
  • [DH] tests/ref/fate/vp9-00-quantizer-09
  • [DH] tests/ref/fate/vp9-00-quantizer-10
  • [DH] tests/ref/fate/vp9-00-quantizer-11
  • [DH] tests/ref/fate/vp9-00-quantizer-12
  • [DH] tests/ref/fate/vp9-00-quantizer-13
  • [DH] tests/ref/fate/vp9-00-quantizer-14
  • [DH] tests/ref/fate/vp9-00-quantizer-15
  • [DH] tests/ref/fate/vp9-00-quantizer-16
  • [DH] tests/ref/fate/vp9-00-quantizer-17
  • [DH] tests/ref/fate/vp9-00-quantizer-18
  • [DH] tests/ref/fate/vp9-00-quantizer-19
  • [DH] tests/ref/fate/vp9-00-quantizer-20
  • [DH] tests/ref/fate/vp9-00-quantizer-21
  • [DH] tests/ref/fate/vp9-00-quantizer-22
  • [DH] tests/ref/fate/vp9-00-quantizer-23
  • [DH] tests/ref/fate/vp9-00-quantizer-24
  • [DH] tests/ref/fate/vp9-00-quantizer-25
  • [DH] tests/ref/fate/vp9-00-quantizer-26
  • [DH] tests/ref/fate/vp9-00-quantizer-27
  • [DH] tests/ref/fate/vp9-00-quantizer-28
  • [DH] tests/ref/fate/vp9-00-quantizer-29
  • [DH] tests/ref/fate/vp9-00-quantizer-30
  • [DH] tests/ref/fate/vp9-00-quantizer-31
  • [DH] tests/ref/fate/vp9-00-quantizer-32
  • [DH] tests/ref/fate/vp9-00-quantizer-33
  • [DH] tests/ref/fate/vp9-00-quantizer-34
  • [DH] tests/ref/fate/vp9-00-quantizer-35
  • [DH] tests/ref/fate/vp9-00-quantizer-36
  • [DH] tests/ref/fate/vp9-00-quantizer-37
  • [DH] tests/ref/fate/vp9-00-quantizer-38
  • [DH] tests/ref/fate/vp9-00-quantizer-39
  • [DH] tests/ref/fate/vp9-00-quantizer-40
  • [DH] tests/ref/fate/vp9-00-quantizer-41
  • [DH] tests/ref/fate/vp9-00-quantizer-42
  • [DH] tests/ref/fate/vp9-00-quantizer-43
  • [DH] tests/ref/fate/vp9-00-quantizer-44
  • [DH] tests/ref/fate/vp9-00-quantizer-45
  • [DH] tests/ref/fate/vp9-00-quantizer-46
  • [DH] tests/ref/fate/vp9-00-quantizer-47
  • [DH] tests/ref/fate/vp9-00-quantizer-48
  • [DH] tests/ref/fate/vp9-00-quantizer-49
  • [DH] tests/ref/fate/vp9-00-quantizer-50
  • [DH] tests/ref/fate/vp9-00-quantizer-51
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  • [DH] tests/ref/fate/vp9-00-quantizer-53
  • [DH] tests/ref/fate/vp9-00-quantizer-54
  • [DH] tests/ref/fate/vp9-00-quantizer-55
  • [DH] tests/ref/fate/vp9-00-quantizer-56
  • [DH] tests/ref/fate/vp9-00-quantizer-57
  • [DH] tests/ref/fate/vp9-00-quantizer-58
  • [DH] tests/ref/fate/vp9-00-quantizer-59
  • [DH] tests/ref/fate/vp9-00-quantizer-60
  • [DH] tests/ref/fate/vp9-00-quantizer-61
  • [DH] tests/ref/fate/vp9-00-quantizer-62
  • [DH] tests/ref/fate/vp9-00-quantizer-63
  • [DH] tests/ref/fate/vp9-01-sharpness-1
  • [DH] tests/ref/fate/vp9-01-sharpness-2
  • [DH] tests/ref/fate/vp9-01-sharpness-3
  • [DH] tests/ref/fate/vp9-01-sharpness-4
  • [DH] tests/ref/fate/vp9-01-sharpness-5
  • [DH] tests/ref/fate/vp9-01-sharpness-6
  • [DH] tests/ref/fate/vp9-01-sharpness-7
  • [DH] tests/ref/fate/vp9-02-size-08x08
  • [DH] tests/ref/fate/vp9-02-size-08x10
  • [DH] tests/ref/fate/vp9-02-size-08x16
  • [DH] tests/ref/fate/vp9-02-size-08x18
  • [DH] tests/ref/fate/vp9-02-size-08x32
  • [DH] tests/ref/fate/vp9-02-size-08x34
  • [DH] tests/ref/fate/vp9-02-size-08x64
  • [DH] tests/ref/fate/vp9-02-size-08x66
  • [DH] tests/ref/fate/vp9-02-size-10x08
  • [DH] tests/ref/fate/vp9-02-size-10x10
  • [DH] tests/ref/fate/vp9-02-size-10x16
  • [DH] tests/ref/fate/vp9-02-size-10x18
  • [DH] tests/ref/fate/vp9-02-size-10x32
  • [DH] tests/ref/fate/vp9-02-size-10x34
  • [DH] tests/ref/fate/vp9-02-size-10x64
  • [DH] tests/ref/fate/vp9-02-size-10x66
  • [DH] tests/ref/fate/vp9-02-size-16x08
  • [DH] tests/ref/fate/vp9-02-size-16x10
  • [DH] tests/ref/fate/vp9-02-size-16x16
  • [DH] tests/ref/fate/vp9-02-size-16x18
  • [DH] tests/ref/fate/vp9-02-size-16x32
  • [DH] tests/ref/fate/vp9-02-size-16x34
  • [DH] tests/ref/fate/vp9-02-size-16x64
  • [DH] tests/ref/fate/vp9-02-size-16x66
  • [DH] tests/ref/fate/vp9-02-size-18x08
  • [DH] tests/ref/fate/vp9-02-size-18x10
  • [DH] tests/ref/fate/vp9-02-size-18x16
  • [DH] tests/ref/fate/vp9-02-size-18x18
  • [DH] tests/ref/fate/vp9-02-size-18x32
  • [DH] tests/ref/fate/vp9-02-size-18x34
  • [DH] tests/ref/fate/vp9-02-size-18x64
  • [DH] tests/ref/fate/vp9-02-size-18x66
  • [DH] tests/ref/fate/vp9-02-size-32x08
  • [DH] tests/ref/fate/vp9-02-size-32x10
  • [DH] tests/ref/fate/vp9-02-size-32x16
  • [

• Improper use of system() call ?

  28 mai 2013, par Dima1982

  I have a particle system program that generates a .dat file with particle coordinates in every iteration. The end goal is to run the program multiple times via a script with different parameters. So, I am trying to setup my program in a way that, for every run, all relevant data are going to be stored in a folder.

  What I do is to generate PNGs from the .dat files with Gnuplot, call ffmpeg to create a video out of the PNGs, use WinRAR to compress the .dat files and finally clean up, by deleting all the intermediate files. This works, when I do it in the working directory.

  Now I try to create a new directory and do the same stuff in there. My code :

  // Load the proper library to use chdir() function
  
  #ifdef _WIN32
  
  #include 
  
  #elif defined __linux__ || defined __APPLE__&&__MACH__
  
  #include 
  
  #endif
  
  
  
  // Make output directory and change working directory to new directory
  
      ostringstream dirCommand;
  
      dirCommand << "mkdir " << folderName_str;
  
      system(dirCommand.str().c_str());
  
      const char* test  = folderName_str.c_str();
  
      #ifdef _WIN32
  
          if(_chdir(test))
  
          {
  
              printf( "Unable to locate the directory: %s\n",test);
  
              return;
  
          }
  
      #elif defined __linux__ || defined __APPLE__&&__MACH__
  
          if(chdir(test))
  
          {
  
              printf( "Unable to locate the directory: %s\n",test);
  
              return;
  
          }
  
      #endif
  
          else
  
              printf("Created output directory...\n");

  Already for this part, I know that there are going to be objections. I have looked extensively on SO and many people favor SetCurrentDirectory() for Windows, or they are skeptical about using system(). In my defense, I am a novice programmer and my knowledge is really limited...

  Now, when I try to make the video with FFMpeg and then rar/tar my files :

  // Make video
  
          std::cout << "Generating Video..." << endl;
  
          ostringstream command;
  
          command << "ffmpeg -f image2 -r 1/0.1 -i output_%01d.png -vcodec mpeg4 " << videoName_str << ".avi -loglevel quiet";
  
          std::system(command.str().c_str());
  
  
  
          // Clean Up!
  
          std::cout << "Cleaning up!" << endl;
  
          ostringstream command2;
  
          #ifdef _WIN32
  
              command2 << "rar -inul a " << videoName_str << ".rar *.dat settings.gp loadfile.gp";
  
          #elif defined __linux__ || defined __APPLE__&&__MACH__
  
              command2 << "tar cf " << videoName_str << ".tar *.dat settings.gp loadfile.gp";
  
          #endif
  
          std::system(command2.str().c_str());

  I get very different behaviors in Win/ Linux.

  Win 7 x64, Visual Studio 2010/12

  In windows, the folder is created. The .dat files are generated correctly and gnuplot plots the PNGs as well. When ffmpeg is called, nothing happens. No error message from FFMpeg or anything. The same goes for WinRAR. Maybe, for the last thing, I can use the command line utility of 7z which is free !

  Linux Mint 14 x64, Qt 4.8.1

  Strangely enough, the behavior is inverted from that of Windows. As soon as the dir is changed, only the first .dat file is generated. It is as if every subsequent call I make to fprintf() for my file generation does not work, or gets lost somewhere. Gnuplot works, as do ffmpeg and tar !!

  I am really perplexed. Any help, would be really appreciated.

• need help using ffmpeg to "concat" multiple audio files (webm, mp4) to make one longer MP3 of audio

  28 septembre 2020, par djturbojp7

  I have done some searching (for several hours) and tried to manipulate many examples to work for me, but I still keep coming up empty here.

  


  I am using linux-mint 19, with ffmpeg installed. I have a folder with several audio files. The majority of these are "webm" (with no video) and there are a few "m4a". I am trying to make one long mp3 file from the audio in all of these strung together from start to finish.

  


  Lets say for sake of argument, my directory has the following files :

  


  audio file a.webm
audio file b.webm
audio file c.m4a
audio file d.webm


  


  I found a script that I could write online where someone is creating a file called "mylist.txt" with this bit of code :

  


      # with a bash for loop
for f in ./*.*; do echo "file '$f'" >> mylist.txt; done
# or with printf
printf "file '%s'\n" ./*.* > mylist.txt


  


  this generated a text file with the following type of content :

  


  file './audio file a.webm'
file './audio file b.webm'
file './audio file c.m4a'
file './audio file d.webm'


  


  first, I believe the "./" is causing a problem, because when I look at other examples I don't see this but I am not sure why it is generating this way in my script because I don't see this in web examples online. Second, I have tried to "concate" this with ffmpeg but I'm not sure which is the best option. I found some documentation here :

  


  https://trac.ffmpeg.org/wiki/Concatenate

  


  however this example applies to video specifically

  


  Can anyone lead me in the right direction ?

  


  EDIT******

  


  I tried the solution below, with "mylist.txt" as the input and I am getting an error :

  


      user@machine/TEMP$ ffmpeg -i mylist.txt -filter_complex "[0:a][1:a][2:a][3:a]concat=n=20:a=1:v=0[a]" -map "[a]" output.mp3
ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --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
Input #0, tty, from 'mylist.txt':
  Duration: 00:00:00.40, bitrate: 47 kb/s
    Stream #0:0: Video: ansi, pal8, 640x400, 25 fps, 25 tbr, 25 tbn, 25 tbc
Stream specifier ':a' in filtergraph description [0:a][1:a][2:a][3:a]concat=n=20:a=1:v=0[a] matches no streams.