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• avcodec/qsvenc : Remove dead code for user-provided buffers

  9 septembre 2021, par Andreas Rheinhardt

  avcodec/qsvenc : Remove dead code for user-provided buffers
  Dead since commit 93016f5d1d280f9cb7856883af287fa66affc04c
  
  which ensured that the packets received by encoders are always blank.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/qsvenc.c

• Rails Paperclip : Skip ffmpeg in video uploading

  4 octobre 2017, par aliahme922

  I have a rails API application and I am using paperclip (s3 storage) for video upload. The file is sent from Android app which is already converted into mp4 and resized at its end but when I add the processor ffmpeg to my video attachment the ffmpeg tries to transcode and resize the video again, which I reckon is not necessary.

  I am not sure that my point is valid that is it always necessary for paperclip to run ffmpeg command of already converted video sent
  from client side ? Or we can stop it of doing it so or perhaps it might not even need to be required. Because what I read from different ffmpeg sources is that it converts a video to different formats so that the file becomes heterogeneous and can be played in various players and devices. Anyway the purpose of this question is to ask that I have a small EC2 instance in which ffmpeg is run in background through sidekiq because it takes a lot of time for conversion and since, what I saw, due to its high memory consumption of CPU and Memory my server went down for like half an hour. So instead of upgrading the instance I need to know that in my case do I have to use ffmpeg or not ?

  Well for the time being, to get rid out of this I changed the concurrency of sidekiq to run only 1 thread at a time and also I made some output changes to ffmpeg processor in my attachment config in order to reduce conversion time.

  has_attached_file :url,
  
                  styles: {
  
                      original: {
  
                          format: 'mp4', streaming: true,
  
                          convert_options: {
  
                              output: {
  
                                  'c:v': 'libx264',
  
                                  preset: 'ultrafast',
  
                                  movflags: '+faststart',
  
                                  crf: '23',
  
                                  'c:a': 'aac',
  
                                  'b:a': '128k',
  
                                  'vf': 'scale=-2:720,format=yuv420p'
  
                              }
  
                          }
  
                      }
  
                  },
  
                  processors: [
  
                      :ffmpeg
  
                  ],
  
                  only_process: [
  
                      :original
  
                  ]

  This helped me and solved my problem, but again I think for my case I can take much better approach. Need your feedback guys, I will really appreciate.

• Convert a bash script to Windows bat script [closed]

  17 mai 2024, par gyandoo

  I have a bash script, now I need to convert it to bat.

  


  What the script does is based on the shortcut the script checks the audio codec and video codec using ffprobe and then loops through all the files in the folder to convert the file(s) using the presets based on which one the shortcut calls.

  


  It also limits the processor usage before running ffmpeg.

  


  Here's the script :

  


  #!/bin/sh
FILES="/home/red/Downloads/to_convert/*"
to_convert="/home/red/Downloads/to_convert"
TYPE="$1"
#echo "$TYPE"
if [ -e '/tmp/convert.txt' ]; then
  echo "Ffmpeg is currently converting a file!"
  exit 0
else
if [ "$(ls -A $to_convert)" ];
then
    #Create a temp file so if the script is run hourly and there is an existing instance running the scripts exits
    echo >> '/tmp/convert.txt'
    #iterate through each file in the directory
    for f in $FILES
    do
    FILENAME1=$(basename "$f")
    FILENAME=${FILENAME1%.*}

    
    ##  Detect what audio codec is being used:
    audio=$(ffprobe "$f" 2>&1 | sed -n '/Audio:/s/.*: \([a-zA-Z0-9]*\).*/\1/p' | sed 1q)
    ##  Detect video codec:
    video=$(ffprobe "$f" 2>&1 | sed -n '/Video:/s/.*: \([a-zA-Z0-9]*\).*/\1/p' | sed 1q)
    ##  Set default audio settings (you may need to use a different encoder,
    ##  since libfdk_aac is not re-distributable)
    aopts="-c:a libfdk_aac -vbr 3"
    ##  Set default video settings:
    vopts="-c:v libx264 -crf 22 -preset veryfast"

    case "$audio" in
        aac|mp3 )
    #If the audio is one of the MP4-supported codecs,
    #copy the stream instead of transcoding
            aopts="-c:a copy"
            ;;
        "" )
    #If there is no audio stream, don't bother with audio
            aopts="-an"
            ;;
        * )
            ;;
    esac

    case "$video" in
    #If the video stream is one of the MP4-compatible formats,
    #copy the stream
        h264|mpeg4|mpeg2video|mpeg1video )
            vopts="-c:v copy"
            ;;
        "" )
    #If no video stream is detected, don't bother with video
            vopts="-vn"
            ;;
        * )
            ;;
    esac

    
    if [ "$TYPE" = "shrink" ]; then
    
      taskset -c 0,2 ffmpeg -i "$f" -vcodec libx265 -crf 28 -map_metadata -1 "/home/red/Downloads/done/""$FILENAME"".mp4" && success=0 || success=1

    elif [ "$TYPE" = "phone" ]; then

      taskset -c 0,2 ffmpeg -y -i "$f" -vf scale=640:-2 -map_metadata -1 "/home/red/Downloads/done/""$FILENAME"".mp4" && success=0 || success=1

    elif [ "$TYPE" = "pmv" ]; then

      taskset -c 0,2 ffmpeg -y -i "$f" -vf scale=360:-2 -map_metadata -1 "/home/red/Downloads/done/""$FILENAME"".mp4" && success=0 || success=1      

    elif [ "$TYPE" = "music" ]; then

      taskset -c 0,2 ffmpeg -i "$f" -acodec libmp3lame "/home/red/Downloads/done/""$FILENAME"".mp3" && success=0 || success=1  

    elif [ "$TYPE" = "audio-boost" ]; then

      taskset -c 0,2 ffmpeg -i "$f" -vcodec copy -af "volume=10dB" "/home/red/Downloads/done/""$FILENAME"".mp4" && success=0 || success=1

    elif [ "$TYPE" = "burn-first-sub" ]; then  

      taskset -c 0,2 ffmpeg -i "$f" -vf "subtitles=""$f"":si=0'" "/home/red/Downloads/done/""$FILENAME"".mp4" && success=0 || success=1

    elif [ "$TYPE" = "burn-srt" ]; then  

      taskset -c 0,2 ffmpeg -i "$f" -vf "subtitles=/home/red/Downloads/to_convert/""$FILENAME"".srt" "/home/huckleberry/Downloads/done/""$FILENAME"".mp4" && success=0 || success=1

    elif [ "$TYPE" = "audio-track2" ]; then  

      taskset -c 0,2 ffmpeg -y -i "$f" -map 0:v -map 0:a:1 $vopts $aopts -map_metadata -1 "/home/red/Downloads/done/""$FILENAME"".mp4" && success=0 || success=1

    elif [ "$TYPE" = "split" ]; then  

      taskset -c 0,2 MP4Box -splits 1996800 "$f" && success=0 || success=1

    elif [ "$TYPE" = "fix" ]; then  
      taskset -c 0,2 ffmpeg -y -i "$f" -map 0:v:0 -map 0:a:0 -vcodec libx264 -acodec aac -map_metadata -1 "/home/red/Downloads/done/""$FILENAME"".mp4" && success=0 || success=1

    else    

      taskset -c 0,2 ffmpeg -y -i "$f" -map 0:v -map 0:a:0 $vopts $aopts -map_metadata -1 "/home/red/Downloads/done/""$FILENAME"".mp4" && success=0 || success=1

      TYPE="converted"

    fi

    
    if [ $success -eq 0 ]; then
        swaks --header Subject:"${TYPE} - ${FILENAME}" --body "${FILENAME}" -S
        echo "Removing $f file..."
        rm "$f"
    else
        swaks --header Subject:"failed - ${FILENAME}" --body "${FILENAME}" -S
        echo "process failed"
    fi    
   
    done
    
    #remove the temp file created
    rm "/tmp/convert.txt"
    exit 0
else
    echo "to_convert folder is empty"
    exit 0
fi
exit 0
fi