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• FFMPEG Command in Android Failing to Execute

  15 janvier 2015, par Zoe

  I’m trying to execute ffmpeg commands through an android app I’m developing.

  I found this post which has been somewhat useful :
  Problems with ffmpeg command line on android

  and I downloaded a static build of ffmpeg from here : http://ffmpeg.gusari.org/static/

  The problem is, when this code runs

  public void merge_video(){
  
  
  
  
  
        String[] ffmpegCommand = new String[5];
  
        ffmpegCommand[0] = "/data/data/com.example.zovideo/ffmpeg";
  
        ffmpegCommand[1] = "-i";
  
        ffmpegCommand[2] = "concat:storage/emulated/0/DCIM/Camera/VID30141106_211509.mp4|storage/emulated/0/DCIM/Camera/VID30141106_211509.mp4";
  
        ffmpegCommand[3] = "copy";
  
        ffmpegCommand[4] = "storage/emulated/0/DCIM/ZoVideo/Output.mp4";  
  
  
  
        try {
  
            Process ffmpegProcess = new ProcessBuilder(ffmpegCommand).redirectErrorStream(true).start();
  
  
  
            String line;
  
            BufferedReader reader = new BufferedReader(new InputStreamReader(ffmpegProcess.getInputStream()));
  
            Log.d(null, "*******Starting FFMPEG");
  
  
  
            while((line = reader.readLine())!=null){
  
  
  
                Log.d(null, "***"+line+"***"); 
  
            }
  
            Log.d(null,"****ending FFMPEG****");
  
  
  
      } catch (IOException e) {
  
          e.printStackTrace();
  
      }
  
    }

  It fails when trying to start the process with

  Java.io.IOException: Error running exec(). Command: [/data/data/com.example.zovideo/ffmpeg, -i, concat:storage/emulated/0/DCIM/Camera/VID30141106_211509.mp4|storage/emulated/0/DCIM/Camera/VID30141106_211509.mp4, copy, storage/emulated/0/DCIM/ZoVideo/Output.mp4] Working Directory: null Environment: [ANDROID_ROOT=/system, EMULATED_STORAGE_SOURCE=/mnt/shell/emulated, LOOP_MOUNTPOINT=/mnt/obb, LD_PRELOAD=libsigchain.so, ANDROID_BOOTLOGO=1, EMULATED_STORAGE_TARGET=/storage/emulated, EXTERNAL_STORAGE=/storage/emulated/legacy, SYSTEMSERVERCLASSPATH=/system/framework/services.jar:/system/framework/ethernet-service.jar:/system/framework/wifi-service.jar, ANDROID_SOCKET_zygote=10, PATH=/sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin, ANDROID_DATA=/data, ANDROID_ASSETS=/system/app, ASEC_MOUNTPOINT=/mnt/asec, BOOTCLASSPATH=/system/framework/core-libart.jar:/system/framework/conscrypt.jar:/system/framework/okhttp.jar:/system/framework/core-junit.jar:/system/framework/bouncycastle.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/telephony-common.jar:/system/framework/voip-common.jar:/system/framework/ims-common.jar:/system/framework/mms-common.jar:/system/framework/android.policy.jar:/system/framework/apache-xml.jar, ANDROID_PROPERTY_WORKSPACE=9,0, ANDROID_STORAGE=/storage]

  I understand from the stackoverflow post I mentioned above that the ffmpeg static build needs to be on my device otherwise my app cannot use it.

  However I’m unsure how to get it in the /data/data/com.example.zovideo folder as needed.

  I have done is download the latest static ffmpeg build from http://ffmpeg.gusari.org/static/ and copied it into my libs/armeabi and libs/armeabi-v7a folders but this obviously hasn’t succeeded in getting into the data/data folder when my app is installed onto my device.
  (I feel like I’m being an idiot by copy/pasting the files but I don’t know what else to do. I don’t know how to compile it myself - I have compiled ffmpeg using a Roman10 tutorial but this produces .so files which from which I understand is not what I need)

  So I’m a little stuck.
  Any advice is greatly appreciated. Thanks

• ffmpeg concatenation audio out of sync

  24 août 2014, par av8r

  So I am attempted to concat clips from a camcorder with anintro and ending clip. All my videos have two streams Video and Audio 0:0 and 0:1 and all the streams are h264 for video and AAC for audio. The into and ending clips were created from a single jpeg image and the audio tracks are silent. The concat portion of my script was created by burke and is the MultiMedia concat script (mcat). If I concat the camcorder clips with my script they come out okay, just slightly off but really not very noticeable when I add the intro and ending clips with the camera clips the final output video is horribly out of sync. The audio/video sync is progressive and as such becomes worse and the video runs. I am not sure what I am doing wrong or what is going wrong to fix this issue. Any help would be much appreciated. Below is the script.

  #!/bin/bash
  
  
  
  
  
  CD="/Applications/CocoaDialog.app/Contents/MacOS/CocoaDialog"
  
  
  
  catnum=$($CD standard-inputbox --no-newline \
  
  --title "Video Controls" \
  
  --informative-text "Please enter the catalog number for this sermon.")
  
  
  
  [[ $(head -n1 <<< "$catnum") == "2" ]]
  
  catnum=$(tail -n1 <<<"$catnum")
  
  output="$catnum.MP4"
  
  
  
  psp_dir="psp/$catnum/"
  
  qhd_dir="qhd/$catnum/"
  
  psp_ts="$psp_dir$catnum-%04d.ts"
  
  qhd_ts="$qhd_dir$catnum-%04d.ts"
  
  
  
  EXTRA_OPTIONS='-vcodec libx264 -x264opts opencl -crf 23 -preset faster -acodec      libfdk_aac -ac 2 -ar 44100 -ab 128k'
  
  #qhd='-c:v vp9 -map 0 -f segments -segment_time 10 -segment_list $last.m3u8 - segment_format mpegts -s 960x540 -minrate 200k -maxrate 650k -c:a libfdk_aac -strict  experimental -ac 1 -ar 22050 -ab 64k'
  
  #psp='-c:v vp9 -map 0 -f segments -segment_time 10 -segment_list $last.m3u8 -segment_format mpegts -s 480x272 -minrate 200k -maxrate 650k -c:a libfdk_aac -strict experimental -ac 1 -ar 22050 -ab 64k'
  
   # OLD Extra_options -vcodec libx264 -crf 23 -preset medium -acodec aac -strict  experimental -ac 2 -ar 44100 -ab 128k
  
  
  
  
  
  TMP=/tmp
  
  files=input/*.MP4
  
  fade_temp=processing/fade_tmp.mp4
  
  fade_temp1=processing/fade_tmp1.mp4
  
  intro='intro.mp4 '
  
  ending='ending.mp4'
  
  rm -f $TMP/mcs_*
  
  rm -f /tmp/hpipe
  
  # mkfifo /tmp/hpipe
  
  
  
  
  
  
  
  fade() {
  
     first=${@:1:1}
  
     second=${@:2:1}
  
     last=${@:$#:1}
  
  
  
  sec=$(/usr/local/bin/ffmpeg -i $last 2>&1 | grep "Duration"| cut -d ' ' -f 4 | sed s/,// |awk '{ split($1, A, ":"); print 3600*A[1] + 60*A[2] + A[3] - 1 }')
  
  #sec=`bc <<< $finvidsec-1`
  
      echo "$first and $last"
  
      echo "*** The Time of the Last clip in sec:$sec ***"
  
  ffmpeg -y -i $first -c:v libx264 -x264opts opencl -af "afade=t=in:ss=0:d=1" -vf "fade=in:st=0:d=1:color=white" -pix_fmt yuv420p $fade_temp 2>/dev/null null
  
  ffmpeg -y -i $last -c:v libx264 -x264opts opencl -af "afade=t=out:st=$sec:d=1" -vf "fade=t=out:st=$sec:d=1:color=white" -pix_fmt yuv420p $fade_temp1 2>/dev/null null
  
  mv -f $fade_temp $first
  
  mv -f $fade_temp1 $last
  
   }
  
  
  
  concat() {
  
      first=${@:1:1}
  
      second=${@:2:1}
  
      last=${@:$#:1}
  
      len=$(($#-2))
  
      inputs=${@:2:$len}
  
      mkfifo $TMP/mcs_a1 $TMP/mcs_v1
  
      fps=$(ffmpeg -i $first 2>&1 | awk '/fps/{for(f=1;f<=NF;f++){if($f~/^fps,*$/){print $(f-1)}}}')
  
  
  
      ffmpeg -y -i $first -vn -f u16le -acodec pcm_s16le -ac 2 -ar 44100 $TMP/mcs_a1 2>/dev/null null &
  
      ffmpeg -y -r $fps -i $first -an -f yuv4mpegpipe -vcodec rawvideo -r 29.97 $TMP/mcs_v1 2>/dev/null null &
  
  
  
  all_a=$TMP/mcs_a1
  
  all_v=$TMP/mcs_v1
  
  i=2
  
  for f in $inputs
  
  do
  
      mkfifo $TMP/mcs_a$i $TMP/mcs_v$i
  
  
  
      fps=$(ffmpeg -i $f 2>&1 |awk '/fps/{for(f=1;f<=NF;f++){if($f~/^fps,*$/){print $(f-1)}}}')
  
  
  
      ffmpeg -y -i $f -vn -f u16le -acodec pcm_s16le -ac 2 -ar 44100 $TMP/mcs_a$i 2>/dev/null null &
  
      { ffmpeg -y -r $fps -i $f -an -f yuv4mpegpipe -vcodec rawvideo -r 29.97 - 2>/dev/null null | tail -n +2 > $TMP/mcs_v$i ; } &
  
  
  
  
  
      all_a="$all_a $TMP/mcs_a$i"
  
      all_v="$all_v $TMP/mcs_v$i"
  
      let i++
  
  done
  
  
  
  
  
  mkfifo $TMP/mcs_a_all
  
  mkfifo $TMP/mcs_v_all
  
  cat $all_a > $TMP/mcs_a_all &
  
  cat $all_v > $TMP/mcs_v_all &
  
  ffmpeg -f u16le -acodec pcm_s16le -ac 2 -ar 44100 -i $TMP/mcs_a_all \
  
         -f yuv4mpegpipe -vcodec rawvideo -i $TMP/mcs_v_all \
  
      $EXTRA_OPTIONS \
  
      $last
  
  rm -f $TMP/mcs_*
  
   #sec=$(/usr/local/bin/ffmpeg -i $last 2>&1 | grep "Duration"| cut -d ' ' -f 4 | sed s/,// |awk '{ split($1, A, ":"); print 3600*A[1] + 60*A[2] + A[3] - 0.5 }')
  
  
  
  }
  
  
  
    hls() {
  
      first=${@:1:1}
  
      mkdir $psp_dir $qhd_dir
  
      ffmpeg -i $first -f ssegment -bsf h264_mp4toannexb -map 0 -segment_time 10 -  segment_list $psp_dir$catnum.m3u8 -segment_format mpegts \
  
     -c:v libx264 -s 480x272 -profile:v baseline -level 3.1 -r 29.97 -g 29.97 \
  
     -keyint_min 90 -x264opts "keyint=90:min-keyint=90:no-scenecut" \
  
     -bufsize 650 -minrate 1 -maxrate 650 \
  
     -c:a libfdk_aac -ar 22050 -ac 1 -ab 32k $psp_ts \
  
     -f ssegment -bsf h264_mp4toannexb -map 0 -segment_time 10 -segment_list   $qhd_dir$catnum.m3u8 -segment_format mpegts \
  
     -c:v libx264 -s 960x540 -profile:v baseline -level 3.1 -r 29.97 -g 29.97 \
  
     -keyint_min 90 -x264opts "keyint=90:min-keyint=90:no-scenecut" \
  
     -bufsize 950 -minrate 1 -maxrate 950 \
  
     -c:a libfdk_aac -ar 22050 -ac 1 -ab 32k $qhd_ts
  
  }
  
  
  
  fade $files
  
  concat $intro $files $ending $output
  
  hls $output

• FFmpeg stream extraction modifies subtitles [closed]

  21 mai 2024, par user18812922

  I have a video with the following ffprobe output :

  


  Input #0, matroska,webm, from 'video.mkv':
  Metadata:
    title           : Video - 01
    creation_time   : 2021-07-14T02:49:59.000000Z
    ENCODER         : Lavf58.29.100
  Duration: 00:22:57.28, start: 0.000000, bitrate: 392 kb/s
  Chapters:
    Chapter #0:0: start 0.000000, end 86.169000
      Metadata:
        title           : Opening
    Chapter #0:1: start 86.169000, end 641.266000
      Metadata:
        title           : Part A
    Chapter #0:2: start 641.266000, end 651.359000
      Metadata:
        title           : Eyecatch
    Chapter #0:3: start 651.359000, end 1286.160000
      Metadata:
        title           : Part B
    Chapter #0:4: start 1286.160000, end 1356.355000
      Metadata:
        title           : Ending
    Chapter #0:5: start 1356.355000, end 1376.876000
      Metadata:
        title           : Preview
  Stream #0:0: Video: hevc (Main 10), yuv420p10le(tv, bt709), 854x480 [SAR 1280:1281 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn (default)
      Metadata:
        DURATION        : 00:22:56.959000000
  Stream #0:1(eng): Audio: vorbis, 48000 Hz, stereo, fltp (default)
      Metadata:
        title           : English [FLAC 2.0]
        DURATION        : 00:22:57.278000000
  Stream #0:2(jpn): Audio: vorbis, 48000 Hz, stereo, fltp
      Metadata:
        title           : Japanese [FLAC 2.0]
        DURATION        : 00:22:57.276000000
  Stream #0:3(eng): Subtitle: ass (ssa)
      Metadata:
        title           : Signs and Songs [FMA1394/Redc4t]
        DURATION        : 00:22:51.090000000
  Stream #0:4(eng): Subtitle: ass (ssa)
      Metadata:
        title           : English [FMA1394/Redc4t]
        DURATION        : 00:22:51.090000000
  Stream #0:5(eng): Subtitle: hdmv_pgs_subtitle (pgssub), 1920x1080
      Metadata:
        title           : Full English Retail
        DURATION        : 00:22:51.120000000
  Stream #0:6: Attachment: ttf
      Metadata:
        filename        : 8bitoperator.ttf
        mimetype        : application/x-truetype-font
  Stream #0:7: Attachment: ttf
      Metadata:
        filename        : Cabin-Bold.ttf
        mimetype        : application/x-truetype-font
  Stream #0:8: Attachment: ttf
      Metadata:
        filename        : calibrib.ttf
        mimetype        : application/x-truetype-font
  Stream #0:9: Attachment: ttf
      Metadata:
        filename        : daniel_0.ttf
        mimetype        : application/x-truetype-font
  Stream #0:10: Attachment: ttf
      Metadata:
        filename        : DEATH_FONT.TTF
        mimetype        : application/x-truetype-font
  Stream #0:11: Attachment: ttf
      Metadata:
        filename        : Dominican.ttf
        mimetype        : application/x-truetype-font
  Stream #0:12: Attachment: ttf
      Metadata:
        filename        : gishabd.ttf
        mimetype        : application/x-truetype-font
  Stream #0:13: Attachment: ttf
      Metadata:
        filename        : PATRICK_0.TTF
        mimetype        : application/x-truetype-font
  Stream #0:14: Attachment: ttf
      Metadata:
        filename        : Qlassik-Medium.ttf
        mimetype        : application/x-truetype-font
Unsupported codec with id 98304 for input stream 6
Unsupported codec with id 98304 for input stream 7
Unsupported codec with id 98304 for input stream 8
Unsupported codec with id 98304 for input stream 9
Unsupported codec with id 98304 for input stream 10
Unsupported codec with id 98304 for input stream 11
Unsupported codec with id 98304 for input stream 12
Unsupported codec with id 98304 for input stream 13
Unsupported codec with id 98304 for input stream 14


  


  I am trying to extract the subtitles, edit them and reattach them to the video.
(I need my program to do that so I don't want to use other software)

  


  Command 1

  


  ffmpeg -i video.mkv -map 0:3 -c:s ssa subs.ass
ffmpeg -i video.mkv -i subs.ass -map 0 -map -0:s -map 1 -c copy out.mkv


  


  Command 2

  


  ffmpeg -i video.mkv -map 0:3 subs.ass
ffmpeg -i video.mkv -i subs.ass -map 0 -map -0:s -map 1 -c copy out.mkv


  


  Command 3

  


  ffmpeg -i video.mkv -map 0:3 subs.srt
ffmpeg -i video.mkv -i subs.srt -map 0 -map -0:s -map 1 -c copy out.mkv


  


  Command 4

  


  ffmpeg -i video.mkv -map 0:3 subs.srt
ffmpeg -i subs.srt subs.ass
ffmpeg -i video.mkv -i subs.ass -map 0 -map -0:s -map 1 -c copy out.mkv


  


  Command 5

  


  ffmpeg -i video.mkv -map 0:3 subs.ass
ffmpeg -i subs.ass subs.srt
ffmpeg -i video.mkv -i subs.srt -map 0 -map -0:s -map 1 -c copy out.mkv


  


  The problem

  


  After extraction the subtitles seem to be really quick, meaning they are displayed and disappear really quickly.

  


  For example the first subtitle is as follows in srt :

  


  1&#xA;00:00:03,100 --> 00:00:03,560&#xA;<font face="Dominican" size="77" color="#f7f7f7">Within the spreading darkness</font>&#xA;

  


  Now, in srt it also has wrong size but I assume that's because of the conversion from ass to srt.

  


  If I reattach the subtitle file in the video and open it, it is displayed and disappears way too fast and it doesn't match the original subtitles in the video.

  


  (ie, the original video subtitles are showing for at least a second)

  


  Expected behaviour

  


  The subtitles should be displayed for the same duration as the original subtitles.

  


  NOTE

  


  It's my first question for ffmpeg related issues so feel free to ask me for anything else you may need.

  


  UPDATE 1

  


  I realized that the subtitles were ok for the timings as they had the same line multiple times, so the problem for not playing is something else.

  


  Example of the file

  


  1&#xA;00:00:03,100 --> 00:00:03,560&#xA;<font face="Dominican" size="77" color="#f7f7f7">Within the spreading darkness</font>&#xA;&#xA;2&#xA;00:00:03,560 --> 00:00:04,650&#xA;<font face="Dominican" size="77" color="#f7f7f7">Within the spreading darkness</font>&#xA;&#xA;3&#xA;00:00:04,650 --> 00:00:05,100&#xA;<font face="Dominican" size="77" color="#f7f7f7">Within the spreading darkness</font>&#xA;

  


  So the problem is that VLC doesn't show more than the first subtitle.

  


  The strange thing is when I use the below command

  


  ffmpeg -i video.mkv -i subs.srt -map 0 -map -0:s -map 1 -c copy -c:s subrip out.mkv


  


  Then more lines of the subtitle (but not all) play.

  


  It stops at the 17th line.

  


  I believe that's an encoder's problem ? but I really don't know.

  


  Also what I noticed is that VLC stops the subtitles but Windows Media Player (Windows 11 version) display the subtitles correctly even after the 17th line.

  


  BUT, if I add subtitles from another video they are played correctly in both VLC and Windows Media Player.

  


  Update 2
As @Gyan said in his answer I should use the following command

  


  ffmpeg -i video.mkv -map 0:3 -c:s copy subs.ass


  


  But then if I attach the subs again with

  


  ffmpeg -i video.mkv -i subs.ass -map 0 -map -0:s -map 1 -c copy -c:s ass out.mkv


  


  The subtitles show up to 17th line in both VLC and Windows Media Player.

  


  or

  


  ffmpeg -i video.mkv -i .\subs.ass -map 0 -map -0:s -map 1 -c copy out.mkv


  


  The subtitles do not show up at all. (Not even in Windows Media Player)