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• How to find what 2 sounds have in common ?

  22 mai 2020, par ThomazPom

  Thank you for your time.

  



  I have a video, with 2 audios tracks (same lenght) (audio1 : en, audio2 : jap).

  



  I try to figure how to export an audio where theses track are identical (blank sound otherwise) or better, the times periods where these have sound in commmon

  



  I think ffmpeg is a good start and i use it occasionally, but this one is a bit too hard for me.

  



  Any ideas ?

  



  Many thanks,
Sorry for my aproximate english.

  



  Thomaz

  



  ->EDIT
Got it with scypi.

  



  from scipy.io.wavfile import read, write
en = read("000001_output_en.wav")
jap = read("000001_output_jp.wav")
out=(en[1]*en[1]==jap[1])
write("output_processed.wav",en[0],out)


  



  to find their common silences :

  



  from scipy.io.wavfile import read, write
en = read("000001_output_en.wav")
jap = read("000001_output_jp.wav")
out=(en[1]*jap[1])
write("output_processed.wav",en[0],out)


  


• How to properly convert RTL subtitles in ffmpeg ?

  25 octobre 2020, par HTMHell

  I'm using the following command to extract subtitles from a video file, and save it as vtt.

  



  ffmpeg -i video.mkv -map 0:s:0 subs.vtt 2>&1


  



  It's working and outputs the subtitles file. The problem is with RTL (right to left) languages (Hebrew, Arabic etc.)
The punctuation are being misplaced.

  



  I will show you an English example of what's happening, for your convenience :

  



  Input text :

  



  Is he alive?
-I don't know.


  



  Output text :

  



  ?Is he alive
.I don't know-


  



  If you want the original text in Hebrew, there it is :

  



  Input Text :

  



  הוא חי?
-אני לא יודע.


  



  Output text :

  



  ?הוא חי
.אני לא יודע-


  



  As you can see, the punctuation marks at the end are going to the start, and vice versa. How can I avoid this behavior ?

  


• ffmpeg and python usage

  23 février 2014, par user2063350

  I have an ffmpeg setup on my pc, which streams mp3 with this code :

  ffmpeg -f dshow -i audio="Input device" -c:a libmp3lame -f mpegts udp://192.168.1.2:7777

  Also i have a server and I want my python script to run 24/7 on server and start/stop writing stream to mp3 file every time pc get's turned on/off. I need new file every time pc turns on (use time and date for filename for example) to bypass overwriting. Using python's subprocess module and ffmpeg I can save file on my server like this :

  subprocess.call('ffmpeg -y -i udp://192.168.1.2:7777 -acodec copy output.mp3')

  But I need condition, when to start recording(listen if 7777 port is reciving data or something like that), is it even possible to implement such thing, using python ?
  P.S. Sorry for my bad English.