Recherche avancée

Sur d’autres sites (10170)

• MovieWriter ffmpeg unavailable ; trying to use instead

  28 janvier 2021, par user6882757

  Is there any way to use moving plot without ffmpeg ?

  



  import matplotlib.animation as animation
from IPython.display import HTML

fig, ax = plt.subplots(figsize=(15, 8))
animator = animation.FuncAnimation(fig, draw_barchart, frames=range(1968, 2019))
HTML(animator.to_jshtml()) 
animator.save('dynamic_images.mp4')


  



  My code is above, I am getting the key error.mp4', ValueError: unknown file extension: .mp4

  



  I tried installing conda install -c conda-forge ffmpeg end up with SSL issue

  



  


  • Is there any way to use moving plot without ffmpeg

  


  • As like error throwing is there any way to use 'matplotlib.animation.PillowWriter'

  


  



  Disclaimer : I went through the link https://www.wikihow.com/Install-FFmpeg-on-Windows but the URL is blocked by the IT team

  


• FFMPEG JAVA ffmpeg doesn't work in .jar application

  3 février 2020, par xkenzzo

  FFMPEG works only in developer mode. When I compile my jar program it returns the following error
  the log of the program launched with eclipse in this case everything works

    ffmpeg version git-2019-12-29-e20c6d9 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 9.2.1 (GCC) 20191125
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --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-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  
    libavutil      56. 38.100 / 56. 38.100
  
    libavcodec     58. 65.100 / 58. 65.100
  
    libavformat    58. 35.101 / 58. 35.101
  
    libavdevice    58.  9.101 / 58.  9.101
  
    libavfilter     7. 70.100 /  7. 70.100
  
    libswscale      5.  6.100 /  5.  6.100
  
    libswresample   3.  6.100 /  3.  6.100
  
    libpostproc    55.  6.100 / 55.  6.100
  
  Input #0, h264, from '.h264':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: h264 (Main), yuv420p(progressive), 3840x2160 [SAR 1:1 DAR 16:9], 60 fps, 60 tbr, 1200k tbn, 120 tbc
  
  Output #0, mp4, to '.mp4':
  
    Metadata:
  
      encoder         : Lavf58.35.101
  
      Stream #0:0: Video: h264 (Main) (avc1 / 0x31637661), yuv420p(progressive), 3840x2160 [SAR 1:1 DAR 16:9], q=2-31, 60 fps, 60 tbr, 15360 tbn, 120 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
  Press [q] to stop, [?] for help
  
  [mp4 @ 000001cedad59440] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
  
  frame= 9273 fps=0.0 q=-1.0 Lsize=  121326kB time=00:01:17.26 bitrate=12863.3kbits/s speed= 207x    
  
  video:121287kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.032451%

  This is where it gets complicated. You can observe the messages that FFMPEG returns to me when I launch my program compile in jar :

  > [h264 @ 0000017c43e5b700] error while decoding MB 58 6, bytestream -14
  
  > [h264 @ 0000017c43e5b700] concealing 30951 DC, 30951 AC, 30951 MV
  
  > errors in I frame [h264 @ 0000017c43e49d80] Stream #0: not enough
  
  > frames to estimate rate; consider increasing probesize [h264 @
  
  > 0000017c43e49d80] decoding for stream 0 failed

  This is the java code which thanks to the ProcessBuilder will launch FFMPEG :

  String urlVideoMp4 = movie.getPath().replace(".h264", ".mp4");
  
  
  
  File videoFinal = new File(urlVideoMp4);
  
  //checking if new video exists : if not, creating it with FFMPEG
  
  
  
  LOG.info("moviePath : " + movie);
  
  ProcessBuilder processBuilder = new ProcessBuilder(FFMPEG, "-framerate", "60", "-r", "120", "-i", movie.getPath(),"-c:v", "copy", urlVideoMp4);
  
  LOG.debug(processBuilder.command());
  
  
  
  processBuilder.inheritIO().start().waitFor();
  
  
  
  return videoFinal;

• libavcodec/qsvenc.c : Set mjpeg height and width alignment

  21 janvier 2020, par JonCookCubic

  libavcodec/qsvenc.c : Set mjpeg height and width alignment
  Currently width_align and height_align are zero when encoding with mjpeg_qsv,
  
  which causes "Error submitting the frame for encoding". This patch sets the alignments.
  There is a little bit more about the problem here http://ffmpeg.org/pipermail/ffmpeg-user/2019-November/046143.html
  Signed-off-by : JonCookCubic <jon.cook@cubicmotion.com>
  
  Signed-off-by : Zhong Li <zhongli_dev@126.com>
  

  • [DH] libavcodec/qsvenc.c