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• Rename files that are beginning with a number to two digits [duplicate]

  9 septembre 2018, par Flavorum1

  This question already has an answer here :

  • Sorting strings with numbers in Bash [duplicate]
    
    3 answers
    

  I have a couple of folders that are audiobooks. The files are numbered and I want to convert them to one file.
  I used the following script to convert them :

      #!/bin/bash 
  
      if [ ! -d mp3 ]; then
  
      mkdir -p mp3;
  
      fi;
  
      for f in ./*.flac; do echo "file '$f'" >> mylist.txt; done
  
      ffmpeg -f concat -safe 0 -i mylist.txt -b:a 320k mp3/title.mp3
  
      [ -e mylist.txt ] && rm mylist.txt

  My problem is that I have to rename the first ten files because they are not in the right order. The files are named 1 - Title, 2 - Title, 3 - Title and so on. To get the right order I have to rename them to 01 - Title, 02 - Title, ..., 09 - Title.
  How can I do that with a bash script ? Furthermore it would be nice, if the playlist.m3u file would be changed accordingly.

  Thanks for your help.

  @Cyrus posted the right Link to solve my problem.
  The solved script ist :

  #!/bin/bash
  
  if [ ! -d mp3 ]; then
  
  mkdir -p mp3;
  
  fi;
  
  for f in ./*.flac; do echo "file '$f'" >> mylist2.txt; done
  
  sort -V mylist2.txt >> mylist.txt
  
  rm mylist2.txt
  
  ffmpeg -f concat -safe 0 -i mylist.txt -b:a 320k mp3/title.mp3
  
  [ -e mylist.txt ] && rm mylist.txt

• avformat/matroskadec : Improve frame size parsing error messages

  3 décembre 2019, par Andreas Rheinhardt

  avformat/matroskadec : Improve frame size parsing error messages
  When parsing the sizes of the frames in a lace fails, sometimes no
  
  error message was raised (e.g. when using xiph or fixed-size lacing).
  
  Only EBML lacing generated error messages (which were wrongly declared
  
  as AV_LOG_INFO), but even here not all errors resulted in an error
  
  message. So add a generic error message to catch them all.
  Moreover, if parsing one of the EBML numbers fails, ebml_read_num already
  
  emits its own error messages, so that all that is needed is a generic error
  
  message to indicate that this happened during parsing the sizes of the
  
  frames in a block ; in other words, the error messages specific to
  
  parsing EBML lace numbers can be and have been removed.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] libavformat/matroskadec.c

• Merging TCP and UDP packets using FFmpeg

  18 décembre 2015, par October Gladiolus

  First, i have encoded TCP and UDP packets which are received from different tunnels, i need to decode these packets using FFmpeg. Now, the TCP packets have to be sent to a buffer that feeds the FFmpeg, while the UDP packets are supposed to go directly to the FFmpeg. The question is : does the FFmpeg have the ability to merge the TCP and UDP packets according to their sequence numbers ? or is there any other way to do so. Thanks