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• ffmpeg with "-pattern_type glob" and variable in bash script

  20 juin 2019, par KlausPeter

  I’m trying to let ffmpeg make a video of all pictures in a directory using the -pattern_type glob switch and "/foo/bar/*.jpg". This works well, if I execute the command manually für just one directory. For example :

  ffmpeg -framerate 35 -pattern_type glob -i '/root/webcam_test/2018-07-21/*.jpg' -vf scale=1280:-1 -c -c:v libx264 -pix_fmt yuv420p /root/clips/out01_cut.mp4

  However, if I do it in a bash script and set the path via a variable, according to ffmpegs output, the variable gets substituted correctly, but ffmpeg states that

  ’/root/webcam_test/2018-07-21/*.jpg’ : No such file or directory

  The part of the script looks like this :

  for D in `find /root/webcam_test/ -type d`
  
  do
  
      [...]
  
      cmd="ffmpeg -framerate 35 -pattern_type glob -i '$D/*.jpg' -vf scale=1280:-1 -c -c:v libx264 -pix_fm                                 t yuv420p /root/clips/$d_cut.mp4"
  
      echo $cmd
  
  [...]
  
  done

  Does anyone know how to make ffmpeg do its wildcard interpretation even if the path is constructed by a script and not just try to plainly use the given path ?
  Best regards and thanks in advance

• avcodec/avcodec : Use avcodec_close() on avcodec_open2() failure

  28 avril 2021, par Andreas Rheinhardt

  avcodec/avcodec : Use avcodec_close() on avcodec_open2() failure
  Compared to the earlier behaviour the following changes :
  
  a) AVCodecInternal.byte_buffer is freed.
  
  b) The last_pkt_props FIFO is emptied before freeing it.
  
  c) If set AVCodecContext.hwaccel is uninitialized and its private data
  
  is freed ; hw_frames_ctx and hw_device_ctx are also unreferenced.
  
  d) coded_side_data is freed.
  
  e) active_thread_type is reset.
  
  a), b), d) should be no-ops as the buffer/fifo should be empty and
  
  no coded_side_data should exist at any point of avcodec_open2().
  
  e) is obviously not bad.
  
  c) is in accordance with the documentation of hw_(frames|device)_ctx
  
  which states that libacodec takes over ownership of these references.
  
  At least in the case of VC-1 it is possible for the hw acceleration to
  
  be set during init and in this case freeing it actually fixes a memleak.
  avcodec_close() needed only minor adjustments to make it work with
  
  a potentially not fully initialized codec.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/avcodec.c

• af_hdcd : Add analyze mode

  7 août 2016, par Burt P

  af_hdcd : Add analyze mode
  A new mode, selected by filter option, to aid in analysis of HDCD
  
  encoded audio. In this mode the audio is replaced by a solid tone and
  
  the amplitude is adjusted to signal some specified aspect of the process.
  
  The output file can be loaded in an audio editor alongside the original,
  
  where the user can see where different features or states are present.
  Signed-off-by : Burt P <pburt0@gmail.com>
  

  • [DH] doc/filters.texi
  • [DH] libavfilter/af_hdcd.c