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• avformat/mov_chan : do not assume channels are in native order

  29 janvier 2024, par Marton Balint

  avformat/mov_chan : do not assume channels are in native order
  Existing code could have caused wrong channel order signalling or reduced
  
  channel count if a channel designation appeared multiple times. This is
  
  actually an old bug, but the conversion to the new channel layout API made it
  
  visible, because now the code overrides the proper channel count with the one
  
  calculated from the mask.
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] libavformat/mov_chan.c

• Make gif using most recent 7x updated JPG in a folder (weekly timelapse !)

  28 juillet 2019, par Brad Sullivan

  This bash script takes a cctv screenshot on cronjob, daily.
  The filenames are saved YY_MM_DD_HH_MM_SS.

  I can make a ’year to date’ timelapse (comes out as sofar.gif) easily using the below line — note that this ignores all filenames / creation dates and just sued every JPG in the folder ffmpeg -pattern_type glob -i $outdir/'*.jpg' $outdir/gif/sofar.gif -y

  But I also want to generate at the same time, a gif using EITHER :
  A) the JPG’s with the most recent 7x file names
  B) the JPG’s with the most recent modified stamp
  (same result)

  I have tried this code below, which does generate a 7days.gif but it only contains 1 frame, the 7th oldest screenshot — rather my desired output having 7 frames made up from the most 7x recent screenshots.

  #!/usr/bin/env bash
  
  PATH=/usr/local/bin:/usr/local/sbin:~/bin:/usr/bin:/bin:/usr/sbin:/sbin
  
  
  
  # runs from a cronjob. saves live screenshot from CCTV to jpg, then updates the year-to-date movie
  
  
  
  if [ $# -ne 1 ]
  
  then
  
    echo "Usage: `basename $0` OUTDIR"
  
    exit 65
  
  fi
  
  
  
  doexit=0
  
  
  
  start=$(date +%s)
  
  end=$(date +%s)
  
  
  
  outdir=${1%/}
  
  mkdir $outdir
  
  mkdir $outdir/gif/
  
  echo "Capturing image..."
  
  
  
  counter=$(date +"%Y_%m_%d_%H-%M-%S");
  
  file=$outdir/$counter.jpg
  
  
  
  if response=$(curl --silent --write-out %{http_code} --max-time 600 'http://192.168.1.69/cgi-bin/snapshot.cgi?chn=0&u=XXX&p=XXX&q=0&d=1&rand=0.14620004288649113' -o $file) ; then
  
      echo "Captured & saved $file!"
  
  else
  
      echo "Failed to capture $file"
  
  fi
  
  
  
  # THIS IS THE BIT WHICH DOES THE LAST 7 DAYS
  
  shopt -s nullglob
  
  files=( "$outdir"/*.jpg )
  
  file_count=${#files[@]}
  
  echo
  
  if (( ${#files[@]} == 0 )); then
  
    echo "ERROR: No files found" >&2; exit 1;
  
  elif (( ${#files[@]} > 7 )); then
  
    files=( "${files[@]:$(( ${#files[@]} - 7 ))}" )
  
  fi
  
  
  
  input_args=( )
  
  for f in "${files[@]}"; do
  
    input_args+=(-i "$f")
  
  done
  
  echo "Making weekly.."
  
  echo "${input_args[@]}"
  
  
  
  echo "Making weekly.."
  
  ffmpeg "${input_args[@]}" $outdir/gif/7days.gif -y
  
  echo "Making YTD.."
  
  ffmpeg -hide_banner -loglevel panic -pattern_type glob -i $outdir/'*.jpg' $outdir/gif/sofar.gif -y
  
  
  
  exit 1

  The code half works as if I echo the ${input_args[@]} I see the correct file list ; Making weekly.. -i 365/2019_07_10_15-00-00.jpg -i 365/2019_07_11_15-00-00.jpg -i 365/2019_07_12_15-00-00.jpg -i 365/2019_07_13_15-00-00.jpg -i 365/2019_07_14_15-00-00.jpg -i 365/2019_07_15_15-00-00.jpg -i 365/2019_07_16_12-00-19.jpg which seems to confuse ffmpeg it because it adds the -i over & over, meaning the gif only has one frame.

  I need to edit the script above to correctly also spit out a 7days.gif which is dynamically made using the most recent 7x screenshots in $outdir