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• How do I use find and ffmpeg to batch convert a bunch of .flac files to .mp3 ?

  30 avril 2019, par Keith

  I have a directory with a bunch of .flac files that I need to convert to .mp3. I plan to use ffmpeg from the command line to do the conversions and I’d like to avoid doing this manually for every file. I’m familiar with the find command but I’m having difficulty using it with ffmpeg which requires both input and output filenames. I imagine using something like

  find . -name "*.flac" -exec ffmpeg -i {}.flac {}.mp3 +

  But of course this doesn’t work. For one thing it fails to strip prefixes and suffixes from the filename being passed to ffmpeg.

  Please also note that the filenames include whitespace so the solution has to ignore whitespace successfully. I’m also on OS X having built ffmpeg with homebrew.

• How to fix "Unable to find a suitable output format for '/'" error in ffmpeg running with PHP [on hold]

  4 avril 2019, par C.Pietro

  I want to compress video on the server after the upload.
  I installed correctly ffmpeg and when i run from the command line

   ffmpeg -i input.mp4 -vcodec libx265 -crf 28 -vcodec h264 -acodec aac -strict -2 output.mp4

  it works !

  But if i run the same command from PHP with exec,

  class VideoCompress {
  
      function compress($path, $name){
  
          if (`which ffmpeg`) {
  
              exec("cd \"$path\";ffmpeg -i \"$name\" -vcodec libx265 -crf 28 -vcodec h264 -acodec aac -strict -2 \"bk_$name\" / 2>&1", $o);
  
              print_r8($o);
  
          }
  
      }
  
  }

  it fails and return this error

  Array
  
  (
  
      [0] => ffmpeg version N-48518-g27c94c57dc-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers
  
      [1] =>   built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
  
      [2] =>   configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg
  
      [3] =>   libavutil      56. 26.100 / 56. 26.100
  
      [4] =>   libavcodec     58. 48.100 / 58. 48.100
  
      [5] =>   libavformat    58. 26.101 / 58. 26.101
  
      [6] =>   libavdevice    58.  7.100 / 58.  7.100
  
      [7] =>   libavfilter     7. 48.100 /  7. 48.100
  
      [8] =>   libswscale      5.  4.100 /  5.  4.100
  
      [9] =>   libswresample   3.  4.100 /  3.  4.100
  
      [10] =>   libpostproc    55.  4.100 / 55.  4.100
  
      [11] => Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'WebHD_720p.mp4':
  
      [12] =>   Metadata:
  
      [13] =>     major_brand     : isom
  
      [14] =>     minor_version   : 512
  
      [15] =>     compatible_brands: isomiso2avc1mp41
  
      [16] =>     encoder         : Lavf57.71.100
  
      [17] =>   Duration: 00:03:23.22, start: 0.000000, bitrate: 1890 kb/s
  
      [18] =>     Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 9:10 DAR 8:5], 1754 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
  
      [19] =>     Metadata:
  
      [20] =>       handler_name    : VideoHandler
  
      [21] =>     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
      [22] =>     Metadata:
  
      [23] =>       handler_name    : SoundHandler
  
      [24] => [NULL @ 0x59fb100] Unable to find a suitable output format for '/'
  
      [25] => /: Invalid argument
  
  )

  Any idea on how can i fix it ?

• need help on solving my ffmpeg command line

  3 avril 2019, par DRMTV

  i create a small bash script to encode 1080p video , the video will be added with watermark at bottom left and i need to add a black padding on top and bottom

  i tried several way but still no luck , i tried -vf and yes it worked but cant use padding and watermark together , and suggest use filter_complex

  if i use this code directly without bash script it work

  time ffmpeg -hide_banner -i transformers.mp4 -i transformers.ass -loop 1 -i watermark.png -loop 1 -i logo.png -map 0:0 -map 0:1 -filter_complex "[0:0]scale=(iw*sar)*min(1920/(iw*sar)\,800/ih):ih*min(1920/(iw*sar)\,800/ih), pad=1920:800:(1920-iw*min(1920/iw\,800/ih))/2:(800-ih*min(1920/iw\,800/ih))/2;ass=transformers.ass[FID1];[FID1][2:v]overlay=10:${WATERMARKPOSITION}:repeatlast=0:enable='between(t,300,600)'[FID3];[3:v]fade=in:st=1200:d=1.6:alpha=1,fade=out:st=107998:d=1.6:alpha=1[FID6];[FID3][FID6]overlay=10:5:repeatlast=0:enable='between(t,1200,187922)'" -c:v libx264 -minrate 1800k -maxrate 1800k -bufsize 3600k -profile:v high -c:a aac -b:a 128k -profile:a aac_main -movflags faststart -strict -2 -f mp4 -y "transformers.mp4"

  but when i include it with my bash script i got this error ,

  [libx264 @ 0x2a063e0] height not divisible by 2 (300x39)
  
  Output #0, mp4, to '/movie/Paddy/output/Transformers.Age.of.Extinction.2014.1080p.BluRay.H264.AAC-RARBG.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      comment         : Transformers.Age.of.Extinction.2014.1080p.BluRay.H264.AAC-RARBG
  
      encoder         : Lavf57.71.100
  
      title           : Transformers Age of Extinction 2014 1080p BluRay H264 AAC-RARBG - Visit us @ Juraganfilm.COM
  
      Stream #0:0: Video: h264 (libx264), yuv420p, 1920x800 [SAR 1:1 DAR 12:5], q=-1--1, max. 2300 kb/s, 23.98 fps, 23.98 tbn, 23.98 tbc
  
      Metadata:
  
        encoder         : Lavc56.60.100 libx264
  
      Stream #0:1: Video: h264, none, q=2-31, 128 kb/s, SAR 1:1 DAR 0:0, 25 fps
  
      Metadata:
  
        encoder         : Lavc56.60.100 libx264
  
      Stream #0:2(eng): Audio: aac, 0 channels, 128 kb/s (default)
  
      Metadata:
  
        creation_time   : 2017-12-19 07:58:39
  
        handler_name    : SoundHandler
  
        encoder         : Lavc56.60.100 aac
  
  Stream mapping:
  
    Stream #0:0 (h264) -> scale (graph 0)
  
    Stream #0:0 (h264) -> overlay:overlay (graph 0)
  
    Stream #2:0 (png) -> ass (graph 0)
  
    Stream #3:0 (png) -> fade (graph 0)
  
    pad (graph 0) -> Stream #0:0 (libx264)
  
    overlay (graph 0) -> Stream #0:1 (libx264)
  
    Stream #0:1 -> #0:2 (aac (native) -> aac (native))
  
  Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height

  and below is the script i have been working on

  output="/movie/output"
  
  
  
  FILESDIR=`find $PWD -type f -regex ".*\.\(mp4\|mkv\|avi\)" | sed 's@.*/@@' | sort -n`
  
  for video in $FILESDIR
  
  do
  
  
  
  MOVIETITLE=${video%.*}
  
  INFOVID=${MOVIETITLE//./ }
  
  BITRATE="${HEIGHT}"
  
  WIDTH=$(ffprobe -v error -select_streams v:0 -show_entries stream=width,height -of csv=s=x:p=0 ${video} 2>&1 | sed -e 's|\[.*||g' | sed ':a;N;$!ba;s/\n//g' | sed -e 's|x.*||g')
  
  HEIGHT=$(ffprobe -v error -select_streams v:0 -show_entries stream=width,height -of csv=s=x:p=0 ${video} | sed -e 's/.*x//')
  
  WATERMARKPOSITION=$(expr $HEIGHT - 50)
  
  VIDEOMAP=$(ffmpeg -i $video 2>&1 | grep "Stream #" | grep Video | sed -e "s|.*\#||g" | sed -e "s|: Video.*||g" | sed -e "s|(.*||g")
  
  AUDIOMAP=$(ffmpeg -i $video 2>&1 | grep "Stream #" | grep Audio | sed -e "s|.*\#||g" | sed -e "s|: Audio.*||g" | sed -e "s|(.*||g")
  
  MAXRATE=$(expr $BITRATE + 500)
  
  BUFFSIZE=$(expr $MAXRATE \* 2)
  
  
  
  time ffmpeg -hide_banner -i $video -i $MOVIETITLE.ass -loop 1 -i $WATERMARK -loop 1 -i $LOGO -map ${VIDEOMAP} -map ${AUDIOMAP} -filter_complex "[${VIDEOMAP}]scale=(iw*sar)*min(${WIDTH}/(iw*sar)\,${HEIGHT}/ih):ih*min(${WIDTH}/(iw*sar)\,${HEIGHT}/ih), pad=${WIDTH}:${HEIGHT}:(${WIDTH}-iw*min(${WIDTH}/iw\,${HEIGHT}/ih))/2:(${HEIGHT}-ih*min(${WIDTH}/iw\,${HEIGHT}/ih))/2;ass=$MOVIETITLE.ass[FID1];[FID1][2:v]overlay=10:${WATERMARKPOSITION}:repeatlast=0:enable='between(t,300,600)'[FID3];[3:v]fade=in:st=1200:d=1.6:alpha=1,fade=out:st=107998:d=1.6:alpha=1[FID6];[FID3][FID6]overlay=10:5:repeatlast=0:enable='between(t,1200,187922)'" -c:v libx264 -minrate ${BITRATE}k -maxrate ${MAXRATE}k -bufsize ${BUFFSIZE}k -profile:v high -c:a aac -b:a 128k -profile:a aac_main -movflags faststart -strict -2 -f mp4 -y "${output}/$MOVIETITLE.mp4"
  
  done

  has been working all day and still i cant make it to work.

  can someone guide me which part is wrong ?