Recherche avancée

Sur d’autres sites (7073)

• Mute parts of Wave file using Python/FFMPEG/Pydub

  20 avril 2020, par Adil Azeem

  I am new to Python, please bear with me. I have been able to get so far with the help of Google/StackOverflow and youtube :). So I have a long (2 hours) *.wav file. I want to mute certain parts of that file. I have all of those [start], [stop] timestamps in the "Timestamps.txt" file in seconds. Like this :

  



     0001.000 0003.000
   0744.096 0747.096
   0749.003 0750.653
   0750.934 0753.170
   0753.210 0754.990
   0756.075 0759.075
   0760.096 0763.096
   0810.016 0811.016
   0815.849 0816.849


  



  What I have been able to do is read the file and isolate each tuple. I have just output the first tuple and printed it to check if everything looks good. It seems that the isolation of tuple works :) I plan to count the number of tuples (which is 674 in this case) and put in a 'for loop' according to that count and change the start and stop time according to the tuple. Perform the loop on that single *.wav file and output on file with muted sections as the timestamps. I have no idea how to implement my thinking with FFMPEG or any other utility in Python e.g pydub. Please help me.

  



     with open('Timestamps.txt') as f:
   data = [line.split() for line in f.readlines()]
   out = [(float(k), float(v)) for k, v in data]

   r = out[0] 
   x= r[0]
   y= r[1]
   #specific x and y values
   print(x)
   print(y)


  


• movenc : Adjust edit lists to trim out parts of tracks with negative pts

  29 septembre 2012, par Michael Niedermayer

  movenc : Adjust edit lists to trim out parts of tracks with negative pts
  This makes sure that audio preroll for e.g. AAC is signaled correctly.
  Previously we only wrote the edit list correctly if we had negative
  
  dts but started with pts == 0 (e.g. for video with B-frames).
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DBH] libavformat/movenc.c

• avcodec/snow : Move decoder parts out of ff_snow_common_init_after_header

  25 septembre 2023, par Andreas Rheinhardt

  avcodec/snow : Move decoder parts out of ff_snow_common_init_after_header
  They are not common.
  Furthermore, this file is pulled in when linking checkasm and
  
  up until now, the calls to ff_get_buffer() and av_codec_is_decoder()
  
  caused all of libavcodec to be pulled in as well. Besides being
  
  bad size-wise this also has the downside that it pulls in
  
  avpriv_(cga|vga16)_font from libavutil which are marked as
  
  being imported from another library when building libavcodec
  
  as a DLL ; this breaks checkasm because it links both lavc and lavu
  
  statically.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/snow.c
  • [DH] libavcodec/snowdec.c