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• Revert "mpeg4videodec : raise an error if sprite_trajectory.table is NULL"

  23 janvier 2021, par Andreas Rheinhardt

  Revert "mpeg4videodec : raise an error if sprite_trajectory.table is NULL"
  This reverts commit 6ac0e7818399a57e4684202bac79f35b3561ad1e.
  The mpeg4video parser can reach code that presumes that a certain VLC
  
  has been initialized ; yet Libav did not ensure this and Libav bug #1012
  
  [1] is about an ensuing crash.
  Instead of fixing the root cause a simple check for whether said VLC
  
  has already been initialized was added ; said check is inherently racy.
  The proper fix is of course to ensure that the VLC is initialized and
  
  commit 7c76eaeca2791261d3f4f5c98c95f44abdbd879a already ensured this,
  
  so there was no need to merge 6ac0e7818399a57e4684202bac79f35b3561ad1e
  
  at all. This commit therefore reverts said commit.
  [1] : https://bugzilla.libav.org/show_bug.cgi?id=1012
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavcodec/mpeg4videodec.c

• while using opencv in python getting error —>[h264 @ 0x7fd8f4027fc0] error while decoding MB 12 46, bytestream -6 "

  22 janvier 2021, par Himanshu sharma

  I am getting this error —> " [h264 @ 0x7fd8f4027fc0] error while decoding MB 12 46, bytestream -6 "
  
while straming IP camera in python using opencv module.
  
As this error occure, i can't ableenter image description here to save video. You can see this in video enter image description here

  


  Python-> 3.8.5 (default, Jul 28 2020, 12:59:40) [GCC 9.3.0] on linux OS-
Ubuntu - 20.04
OpenCV - 4.4.0
opencv-contrib-python==4.4.0.46

  


  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
himanshu@himanshu-H81M-S:~$ 


  


• Ffmpeg-fluent throwing "At least one output file must be specified" error

  26 octobre 2020, par kazar12567

  Code :

  


  inputs : The directory is my directory. Username is a string, for example "james".
fileExtentionsion is the video extension, for example .mp4.
dateStr is a date string.
Compression is just the factor, ie 40.

  


  ffmpeg()
      .input(`${directory}${username}/video${fileExtension}`)
      .save(`${directory}${username}/${dateStr}${fileExtension}`)
      .addOptions(`-c:v libx265 -crf ${compression} -preset veryfast -c:a aac -b:a 128k`)
      .on("start", (commandLine) => {
        console.log("start : " + commandLine);
      })
      .on("progress", (progress) => {
        console.log("In Progress !!" + Date());
      })
      .on("end", () => resolve())
      .on("error", (err) => {
        console.log("reject");
        return reject(err);
      });
  });


  


  Does anyone know why this does not run, even though it runs in the command line ?