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• Im trying to add Audio to a mute Video and it doesnt work

  15 février 2021, par mybrainisrunningoutofmyears

  I had two approaches :

  


  1.ffmpeg-python

  


  def addaudtovid(audpath,vidpath,savepath): 
    input_video = ffmpeg.input(vidpath)
    input_audio = ffmpeg.input(audpath)
    ffmpeg.concat(input_video, input_audio, v=1, a=1).output(savepath).run()


  


  here for some reason it "cant find a file"(in the fourth line) but all files exist.
Tried this too :

  


  subprocess.run("ffmpeg -i "+vidpath+" -i "+audpath+" -c copy "+savepath)


  


  

  2. MoviePy.editor

  


  


  Here the finished Video starts after about 3 seconds of blackscreen, but the Audio already starts at the beginning

  


  videoclip = VideoFileClip(vidpath)
audioclip = AudioFileClip(audpath)
videoclip.audio = audioclip
videoclip.write_videofile(savepath)


  


  The Audio and Video are exactly the same length

  


  I am using Windows 10 python 3.8

  


  I am happy about any idea how to fix it because I tried everything I could think and google of.

  


• How does wrap_unicode option work when ffmpeg renders subtitles

  12 septembre 2024, par Bazinga

  This is my complete command, which accepts the wrap_unicode option, but the option is not working

  


  '/usr/local/ffmpeg/bin/ffmpeg' '-y' '-i' 'input.mp4' '-threads' '12' '-vcodec' 'libx264' '-acodec' 'aac' '-b:v' '1000k' '-refs' '6' '-coder' '1' '-sc_threshold' '40' '-flags' '+loop' '-me_range' '16' '-subq' '7' '-i_qfactor' '0.71' '-qcomp' '0.6' '-qdiff' '4' '-trellis' '1' '-b:a' '128k' '-vf' '[in]subtitles=test.srt:wrap_unicode=1:force_style='\''FontSize=12,FontName=Angsana New,PrimaryColour=&H00FFFFFF,BorderStyle=1,Outline=0.5,Shadow=1,MarginV=50'\''[out]' '-pass' '1' '-passlogfile' '/var/folders/xh/0xpfqmh57hb12ffvs5wy1v0w0000gn/T/ffmpeg-passes66e24b16ea0aa/pass-66e24b16ea47b' 'output.mp4'


  


  Before that, I compiled libunibreak, libass(0.17.0) in order, and reinstalled ffmpeg.

  


  I hope someone can help me understand where the problem caused this option to not take effect, this problem has been bothering me for some time, thank you very much !

  


• ffmpeg , copy 1st video "codec info" into 2nd video (change 2nd video codec)

  12 juillet 2016, par Tomer

  I’m having 2 videos.
  1st video is the master, it’s codec info needs to be encoded on the 2nd video.
  Means, 2nd video codec will be same as the 1st one.

  I’m having 15 "1st videos" for "Master" codec info and one file that needs to be converted to the various codecs that each file contain.

  Folder contains those files "1st video" :

  2CIF.h264 , 4CIF.h264 , 5MP.h264 , CIF.H264 , CUSTOM.h264 , CUSTOM2.h264 , 
  
  D1.h264 , HD1080.h264 , HD720.h264 , QVGA.h264 , QXGA.h264 , S5020_HD720_15FPS_1Min.mp4 , 
  
  SVGA.h264 , UXGA.h264 , VGA.h264

  and the "2nd video" that needs to be converted is : TOM.MP4

  An output of HD720.h264 for example is :

  Input #0, h264, from 'HD720.h264':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: h264 (Main), yuv420p, 1280x720, 25 fps, 25 tbr, 1200k tbn, 50 tbc

  An output of TOM.MP4 is :

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'TOM.mp4':
  
      Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 1280x
  
  720, 14013 kb/s, 30.01 fps, 30 tbr, 90k tbn, 180k tbc (default)

  what will be the right way to convert those files ?

  I need to verify those settings ( got them through MediaInfo )