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• avcodec/libkvazaar : Bump minimum version to 2.0.0

  2 octobre 2023, par John Mather

  avcodec/libkvazaar : Bump minimum version to 2.0.0
  0cd8769207f utilized the rc_algorithm member of the kvz_config struct, which
  
  was introduced in Kvazaar 2.0.0. This patch bumps the minimum version of
  
  Kvazaar to 2.0.0 so that FFmpeg compiles successfully.
  Signed-off-by : John Mather <johnmather@sidefx.com>
  

  • [DH] configure

• ffmpeg multiple input video in grid and simultaneous audio

  13 février 2023, par Hnusny Pleb

  i would like to copy a video into n videos in one grid :
best example : https://www.youtube.com/watch?v=lYKDTLGH-TQ&ab_channel=TheRabbit_123

  


  This is my code, its working, but problem is, the audio seems to be like its played by one version.. I want the "echo" thats created by a lot of files like on the video above.

  


  def create_4_in_one(number):
shutil.copy("start.mp4", f"video.mp4")
for i in range(number):
    shutil.copy("video.mp4", f"temp_videa/{i}.mp4")
    subprocess.call(f'ffmpeg -y -i video.mp4 -vf "scale=iw/2:ih/2" -c:a copy video_half.mp4',
                  shell=True)
    subprocess.call(f'ffmpeg -y -i video_half.mp4 -i video_half.mp4 -i video_half.mp4 -i video_half.mp4 -filter_complex "[0:v][1:v]hstack[t];[2:v][3:v]hstack[b];[t][b]vstack[v]; [0:a][1:a][2:a][3:a]amerge=inputs=4[a]" -map "[v]" -map "[a]" -map 0:a -map 1:a -map 2:a -map 3:a -c:a aac -b:a 128k -ac 2 -shortest output.mp4',
                  shell=True)
    os.remove("video.mp4")
    os.remove("video_half.mp4")
    os.rename('output.mp4', 'video.mp4')

os.remove("video.mp4")


  


  Thanks in advance.

  


• ffmpeg concat iMovie Import - Inconsistent Failure

  9 octobre 2017, par Erik Kastman

  I’m attempting to create two movies using a set of timed screenshots with ffmpeg, using -f concat to specify png screenshots and durations that they should be shown for. I’m pulling mostly from the ffmpeg slideshow tutorial
  and concat documentation. Quicktime is able to open both of my ffmpeg-generated movies without problem, but despite using identical commands and scripts to create them, iMovie has no problem opening one and never opens the other, no matter how many times I recreate the source screenshots/durations and recreate the video.

  I have two screens that are captured from my input and converted to pngs, and I’m trying to generate two movies to import into iMovie and show side by side at the same time. To generate the movies, I’m using the following command :

  ffmpeg -f concat -i win1input.txt -vsync vfr -pix_fmt yuv420p win1.mov
  
  ffmpeg -f concat -i win2input.txt -vsync vfr -pix_fmt yuv420p win2.mov

  Where win1input.txt and win2input.txt are essentially identical (generated from the same script with different filenames and times) :

  file 'win1-01.png'
  
  duration 3.07
  
  file 'win1-02.png'
  
  duration 2.55
  
  ...

  Both movies are generated and can be opened by quicktime without any complaints. However, when I try to import them into iMovie, the first movie always imports just fine, and the second gives the error "No importable files" and has a 0 duration in the media preview window.

  Can anyone suggest ways to look at the movies and try to find what could be throwing iMovie ? Without a more detailed error I’m stuck. And I’m totally confused as to what could be the difference between the two, since they are generated from the same process, codec, etc. Any help or suggestions for further info about the movies would be appreciated !

  UPDATE with ffmpeg -i output :

  $ ffmpeg -i badMovie.mov
  
  
  
  ffmpeg version 3.3.2 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with Apple LLVM version 8.1.0 (clang-802.0.42)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.3.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libass --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --enable-openssl --disable-lzma --enable-nonfree --enable-vda
  
    libavutil      55. 58.100 / 55. 58.100
  
    libavcodec     57. 89.100 / 57. 89.100
  
    libavformat    57. 71.100 / 57. 71.100
  
    libavdevice    57.  6.100 / 57.  6.100
  
    libavfilter     6. 82.100 /  6. 82.100
  
    libavresample   3.  5.  0 /  3.  5.  0
  
    libswscale      4.  6.100 /  4.  6.100
  
    libswresample   2.  7.100 /  2.  7.100
  
    libpostproc    54.  5.100 / 54.  5.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'badMovie.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 512
  
      compatible_brands: qt  
  
      encoder         : Lavf56.40.101
  
    Duration: 00:02:09.84, start: 0.000000, bitrate: 36 kb/s
  
      Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x800, 35 kb/s, 0.28 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
  Metadata:
  
        handler_name    : DataHandler
  
        encoder         : Lavc56.60.100 libx264
  
  
  
  
  
  $ ffmpeg -i goodMovie.mov
  
  ffmpeg version 3.3.2 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with Apple LLVM version 8.1.0 (clang-802.0.42)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.3.2 --enable-shared --   enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libass --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --enable-openssl --disable-lzma --enable-nonfree --enable-vda
  
    libavutil      55. 58.100 / 55. 58.100
  
    libavcodec     57. 89.100 / 57. 89.100
  
    libavformat    57. 71.100 / 57. 71.100
  
    libavdevice    57.  6.100 / 57.  6.100
  
    libavfilter     6. 82.100 /  6. 82.100
  
    libavresample   3.  5.  0 /  3.  5.  0
  
    libswscale      4.  6.100 /  4.  6.100
  
    libswresample   2.  7.100 /  2.  7.100
  
    libpostproc    54.  5.100 / 54.  5.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'goodMovie.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 512
  
      compatible_brands: qt  
  
      encoder         : Lavf56.40.101
  
    Duration: 00:02:11.84, start: 0.000000, bitrate: 13 kb/s
  
      Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x800, 13 kb/s, 0.64 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
  Metadata:
  
    handler_name    : DataHandler
  
    encoder         : Lavc56.60.100 libx264