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• frame_thread_encoder : make 'exit' member atomic.

  11 septembre 2017, par Ronald S. Bultje

  frame_thread_encoder : make 'exit' member atomic.
  Should fix the following tsan warning :
  WARNING : ThreadSanitizer : data race (pid=19806)
  
    Read of size 4 at 0x7b84000012f0 by thread T9 :
  
      #0 worker src/libavcodec/frame_thread_encoder.c:66 (ffmpeg+0x0000007f349e)
  
  [..]
  
    Previous write of size 4 at 0x7b84000012f0 by main thread (mutexes : write M1395) :
  
      #0 ff_frame_thread_encoder_free src/libavcodec/frame_thread_encoder.c:239 (ffmpeg+0x0000007f379e)
  
  [..]
  

  • [DH] libavcodec/frame_thread_encoder.c

• Why am I getting an exit status of 1 ?

  24 mai 2018, par Akaisteph7

  So, I am writing this code to analyze this video but I am facing this issue when I try to run it in Spyder, Anaconda :

  import subprocess
  
  from subprocess import call
  
  import math
  
  
  
  ##Converts the given file into a series of images
  
  def Video_to_Image_Converter(fileName):
  
      res1 = call("ffmpeg -i " + fileName + " -vf fps=1 frame-%d.jpg", shell=True)
  
      print(res1)
  
      result = subprocess.Popen('ffprobe -i '+ fileName +' -show_entries format=duration -v quiet -of csv="p=0"', stdout=subprocess.PIPE,stderr=subprocess.STDOUT, shell=True)
  
      output = result.communicate()
  
      print(output)
  
      #return math.ceil(float(output[0])) + 1
  
  
  
  
  
  if __name__ == '__main__':
  
      videoLength = Video_to_Image_Converter('sampleVideo.wmv')
  
      print(videoLength)

  So, this code worked fine in iPython but I started having issues when trying to use Spyder. res1 should have an exit status of 0 if everything went well but it is 1. However, I do not know what went wrong. All it says when running subprocess.check_output on call is :

  Command 'ffmpeg -i sampleVideo.wmv -vf fps=1 frame-%d.jpg' returned non-zero exit status 1

  Please help.

• how to integrate ffmpeg gl-transition project in my exit project

  17 décembre 2019, par p.jadhav

  i want to add trasition effect between images of video so i used https://github.com/transitive-bullshit/ffmpeg-gl-transition for video trasition effect but Building command not work in my android studio.
  1.git clone http://source.ffmpeg.org/git/ffmpeg.git ffmpeg.
  2.cd ffmpeg.

  first two command run successfully in android studio terminal.
  when try to run "ln -s /ffmpeg-gl-transition/vf_gltransition.c libavfilter/"
  get error :

  screen shot1
  

  when run command "git apply /ffmpeg-gl-transition/ffmpeg.diff"
  get error :

  screen shot2
  
  and run command "./configure —enable-libx264 —enable-gpl —enable-opengl \
  —enable-filter=gltransition —extra-libs=’-lGLEW -lglfw’"
  get error :

  screen shot3
  
  i use com.writingminds:FFmpegAndroid:0.3.2 for create normal video.please tell me how to integrate library in my project or any anotherway to do this