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  • executing ffmpeg command with getRuntime().exec() command

    12 mai 2015, par Iori

    i want to run ffmepg command directly on android.
    a simple command

    ffmpeg -i vid.mp4 out.mp4

    now the issue is that i have searched the internet and found the best android ffmpeg can be found here

    http://bambuser.com/opensource

    I have downloaded it and read the readme file and compiled it. the folder is ffmpeg. I have kept it in <--projectfolder-->/ffmpeg/

    there is a ffmpeg executeable file in ffmpeg folder called ffmpeg folder

    i have copied it in files folder and run this command

      try {    
    

    
    Toast.makeText(this, "Working", Toast.LENGTH_SHORT).show();
    

    
    Process p = Runtime.getRuntime().exec("/data/data/com.koder.testffmpeg/files/ffmpeg -i /sdcard/vid.mp4 /sdcard/out.mp4");
    

    

    
    } catch (IOException e) {
    

    
    txt.setText(e.toString());
    

    
    Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
    

    
    e.printStackTrace();
    

    
    }

    according to this link
    How do I reduce the video size captured by the default camera using FFMPEG in Android ?

    but still it does not work always exception i dont know what is going wrong
    can someone plz help me with this

    java.io.IOException: Error running exec(). Command:[/data/data/com.koder.testffmpeg/files/ffmpeg -i /sdcard/vid.mp4 /sdcard/out.mp4] Working Directory: null Environment:null

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  • audio extracted from flv file via ffmpeg is of shorter duration than the actual flv video [closed]

    11 janvier 2013, par user1961143

    I have extracted audio from flv file via ffmpeg using this command :-

    ffmpeg -i 164_29.flv v19.mp3

    The flv videos duration is 3 minutes but the audio is of 2 mins 20 seconds only. On searching i found that the silent pieces of audio are removed when generating audio from ffmpeg. But i need the audio file to be of exactly same duration as flv video as later i need to put this audio in the flv video itself. Please help as this is urgent for our project. I am running the FFMpeg via .net windows service, so in case you know any other tool which can extract the audio of same duration as video and can be run via .net, it would be useful too.

    Console output :

    C :\Users\ritika.thakur>ffmpeg -i 164_29.flv v19.mp3
    ffmpeg version N-47062-g26c531c Copyright (c) 2000-2012 the FFmpeg developers
    built on Nov 25 2012 12:23:20 with gcc 4.7.2 (GCC)
    configuration : —disable-static —enable-shared —enable-gpl —enable-version —disable-pthreads —enable-runtime-cpudetect —enable-avisynth —enable-bzlib —enable-frei0r —enable-libass —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libfreetype —enable-libgsm —enable-libmp3lame —enable-libnut -enable-libopenjpeg —enable-libopus —enable-librtmp —enable-libschroedinger -enable-libspeex —enable-libtheora —enable-libutvideo —enable-libvo-aacenc —enable-libvo-amrwbenc —enable-libvorbis —enable-libvpx —enable-libx264 —enale-libxavs —enable-libxvid —enable-zlib
    libavutil 52. 9.100 / 52. 9.100
    libavcodec 54. 77.100 / 54. 77.100
    libavformat 54. 37.100 / 54. 37.100
    libavdevice 54. 3.100 / 54. 3.100
    libavfilter 3. 23.102 / 3. 23.102
    libswscale 2. 1.102 / 2. 1.102
    libswresample 0. 17.101 / 0. 17.101
    libpostproc 52. 2.100 / 52. 2.100
    Input #0, flv, from '164_29.flv' :
    Metadata :
    canSeekToEnd : false
    createdby : FMS 4.0
    creationdate : Tue Jan 08 00:26:19 2013
    Duration : 00:03:04.08, start : 0.000000, bitrate : 283
    kb/s
    Stream #0:0 : Video : flv1, yuv420p, 320x240, 1k tbr, 1k tbn, 1k tbc
    Stream #0:1 : Audio : nellymoser, 22050 Hz, mono, flt
    Output #0, mp3, to 'v19.mp3' :
    Metadata :
    canSeekToEnd : false
    createdby : FMS 4.0
    creationdate : Tue Jan 08 00:26:19 2013
    TSSE : Lavf54.37.100
    Stream #0:0 : Audio : mp3, 22050 Hz, mono, fltp
    Stream mapping :
    Stream #0:1 -> #0:0 (nellymoser -> libmp3lame)
    Press [q] to stop, [?] for help
    size= 567kB time=00:03:04.13 bitrate= 25.2kbits/s video:0kB audio:567kB subtitle:0 global headers:0kB muxing overhead 0.051503%

    This is the output of console for both video and audio file separately :-

    Microsoft Windows [Version 6.1.7601]
    Copyright (c) 2009 Microsoft Corporation. All rights reserved.

    C :\Users\ritika.thakur>ffmpeg -i v19.mp3

    ffmpeg version N-47062-g26c531c Copyright (c) 2000-2012 the FFmpeg developers
    built on Nov 25 2012 12:23:20 with gcc 4.7.2 (GCC)
    configuration : —disable-static —enable-shared —enable-gpl —enable-version3
    —disable-pthreads —enable-runtime-cpudetect —enable-avisynth —enable-bzlib
    — enable-frei0r —enable-libass —enable-libopencore-amrnb —enable-libopencore-
    amrwb —enable-libfreetype —enable-libgsm —enable-libmp3lame —enable-libnut -
    - enable-libopenjpeg —enable-libopus —enable-librtmp —enable-libschroedinger -
    - enable-libspeex —enable-libtheora —enable-libutvideo —enable-libvo-aacenc —
    enable-libvo-amrwbenc —enable-libvorbis —enable-libvpx —enable-libx264 —enab
    le-libxavs —enable-libxvid —enable-zlib
    libavutil 52. 9.100 / 52. 9.100
    libavcodec 54. 77.100 / 54. 77.100
    libavformat 54. 37.100 / 54. 37.100
    libavdevice 54. 3.100 / 54. 3.100
    libavfilter 3. 23.102 / 3. 23.102
    libswscale 2. 1.102 / 2. 1.102
    libswresample 0. 17.101 / 0. 17.101
    libpostproc 52. 2.100 / 52. 2.100
    [mp3 @ 0056e780] max_analyze_duration 5000000 reached at 5015510
    Input #0, mp3, from 'v19.mp3' :
    Metadata :
    canSeekToEnd : false
    createdby : FMS 4.0
    creationdate : Tue Jan 08 00:26:19 2013
    encoder : Lavf54.37.100
    Duration : 00:02:25.14, start : 0.000000, bitrate : 32 kb/s
    Stream #0:0 : Audio : mp3, 22050 Hz, mono, s16, 32 kb/s
    At least one output file must be specified

    C :\Users\ritika.thakur>ffmpeg -i 164_29.flv

    ffmpeg version N-47062-g26c531c Copyright (c) 2000-2012 the FFmpeg developers
    built on Nov 25 2012 12:23:20 with gcc 4.7.2 (GCC)
    configuration : —disable-static —enable-shared —enable-gpl —enable-version3
    —disable-pthreads —enable-runtime-cpudetect —enable-avisynth —enable-bzlib
    — enable-frei0r —enable-libass —enable-libopencore-amrnb —enable-libopencore-
    amrwb —enable-libfreetype —enable-libgsm —enable-libmp3lame —enable-libnut -
    - enable-libopenjpeg —enable-libopus —enable-librtmp —enable-libschroedinger -
    - enable-libspeex —enable-libtheora —enable-libutvideo —enable-libvo-aacenc —
    enable-libvo-amrwbenc —enable-libvorbis —enable-libvpx —enable-libx264 —enab
    le-libxavs —enable-libxvid —enable-zlib
    libavutil 52. 9.100 / 52. 9.100
    libavcodec 54. 77.100 / 54. 77.100
    libavformat 54. 37.100 / 54. 37.100
    libavdevice 54. 3.100 / 54. 3.100
    libavfilter 3. 23.102 / 3. 23.102
    libswscale 2. 1.102 / 2. 1.102
    libswresample 0. 17.101 / 0. 17.101
    libpostproc 52. 2.100 / 52. 2.100
    Input #0, flv, from '164_29.flv' :
    Metadata :
    canSeekToEnd : false
    createdby : FMS 4.0
    creationdate : Tue Jan 08 00:26:19 2013
    Duration : 00:03:04.08, start : 0.000000, bitrate : 283 kb/s
    Stream #0:0 : Video : flv1, yuv420p, 320x240, 1k tbr, 1k tbn, 1k tbc
    Stream #0:1 : Audio : nellymoser, 22050 Hz, mono, flt
    At least one output file must be specified

    If you see the duration of video is of 3:04 but audio extracted from it is of 2:25 only.
    Actually i am using ffmpeg overlay to show two videos side by side in our debate project for the client. Now ffmpeg takes audio from first video by default. But we want the audio from both videos together as a debate going on. Hence I thought of a solution to extract audio from both videos and merge them and than apply them to the overlayed video. This will all work perfectly only if I get the complete audio from the video file i.e. of equal duration.
    For more information i am writing here the overlay command we are using :-

     **ffmpeg -i 164_29.flv  -vf "[in] scale=359:320, pad=2*iw+6:ih
    
  [left];    movie=164_30.flv, scale=359:320 [right]; [left][right] 
    
  overlay=365:0  [out]" -b:v 3600k -y a1.flv**
    

    
 **This is the console output of this overlay command:-**

    C :\Users\ritika.thakur>ffmpeg -i 164_29.flv -vf "[in] scale=359:320, pad=2*iw+6
    :ih [left] ; movie=164_30.flv, scale=359:320 [right] ; [left][right] overlay=365:0
    [out]" -b:v 3600k -y a1.flv
    ffmpeg version N-47062-g26c531c Copyright (c) 2000-2012 the FFmpeg developers
    built on Nov 25 2012 12:23:20 with gcc 4.7.2 (GCC)
    configuration : —disable-static —enable-shared —enable-gpl —enable-version3
    —disable- pthreads —enable-runtime-cpudetect —enable- avisynth
    —enable-bzlib —enable
    -frei0r
    —enable-libass —enable-libopencore-amrnb —enable-libopencore-amrwb
    —enable- libfreetype —enable-libgsm —enable-libmp3lame —enable-libnut
    —enable-libopenjpeg —enable-libopus —enable-librtmp —enable-libschroedinger
    — enable-
    libspeex —enable-libtheora —enable- libutvideo
    —enable-libvo-aacenc —
    enable-libvo-amrwbenc —enable-libvorbis —enable-libvpx
    —enable-libx264 —enab
    le-libxavs —enable-libxvid —enable-zlib
    libavutil 52. 9.100 / 52. 9.100
    libavcodec 54. 77.100 / 54. 77.100
    libavformat 54. 37.100 / 54. 37.100
    libavdevice 54. 3.100 / 54. 3.100
    libavfilter 3. 23.102 / 3. 23.102
    libswscale 2. 1.102 / 2. 1.102
    libswresample 0. 17.101 / 0. 17.101
    libpostproc 52. 2.100 / 52. 2.100
    Input #0, flv, from '164_29.flv' :
    Metadata :
    canSeekToEnd : false
    createdby : FMS 4.0
    creationdate : Tue Jan 08 00:26:19 2013
    Duration : 00:03:04.08, start : 0.000000, bitrate : 283 kb/s
    Stream #0:0 : Video : flv1, yuv420p, 320x240, 1k tbr, 1k tbn, 1k tbc
    Stream #0:1 : Audio : nellymoser, 22050 Hz, mono, flt
    Output #0, flv, to 'a1.flv' :
    Metadata :
    canSeekToEnd : false
    createdby : FMS 4.0
    creationdate : Tue Jan 08 00:26:19 2013
    encoder : Lavf54.37.100
    Stream #0:0 : Video : flv1 ([2][0][0][0] / 0x0002), yuv420p, 724x320, q=2-31,
    3600 kb/s, 1k tbn, 1k tbc
    Stream #0:1 : Audio : mp3 ([2][0][0][0] / 0x0002), 22050 Hz, mono, fltp
    Stream mapping :
    Stream #0:0 -> #0:0 (flv -> flv)
    Stream #0:1 -> #0:1 (nellymoser -> libmp3lame)
    Press [q] to stop, [?] for help
    frame= 83 fps=0.0 q=4.1 size= 343kB time=00:00:07.01 bitrate= 401.2kbits/s
    frame= 149 fps=149 q=2.3 size= 861kB time=00:00:14.87 bitrate= 473.9kbits/s
    frame= 223 fps=148 q=2.0 size= 1492kB time=00:00:22.00 bitrate= 555.4kbits/s
    frame= 308 fps=153 q=2.0 size= 2195kB time=00:00:28.64 bitrate= 627.8kbits/s
    frame= 391 fps=156 q=2.0 size= 2858kB time=00:00:34.06 bitrate= 687.4kbits/s
    frame= 478 fps=159 q=2.0 size= 3541kB time=00:00:39.55 bitrate= 733.4kbits/s
    frame= 547 fps=156 q=2.0 size= 4293kB time=00:00:46.80 bitrate= 751.5kbits/s
    frame= 645 fps=161 q=2.0 size= 4896kB time=00:00:51.63 bitrate= 776.8kbits/s
    Buffer queue overflow, dropping.
    [Parsed_overlay_4 @ 0152ca80] Buffer queue overflow, dropping.
    Last message repeated 16 times
    frame= 731 fps=162 q=2.0 size= 5418kB time=00:00:56.61 bitrate= 784.0kbits/s
    Buffer queue overflow, dropping.
    [Parsed_overlay_4 @ 0152ca80] Buffer queue overflow, dropping.
    Last message repeated 49 times
    frame= 794 fps=158 q=2.0 size= 5802kB time=00:01:02.37 bitrate= 762.1kbits/s
    frame= 886 fps=160 q=2.0 size= 6363kB time=00:01:07.00 bitrate= 778.0kbits/s
    Buffer queue overflow, dropping.
    [Parsed_overlay_4 @ 0152ca80] Buffer queue overflow, dropping.
    Last message repeated 29 times
    frame= 954 fps=158 q=2.0 size= 6785kB time=00:01:13.31 bitrate= 758.2kbits/s
    frame= 1056 fps=162 q=2.0 size= 7377kB time=00:01:16.94 bitrate= 785.4kbits/s
    Buffer queue overflow, dropping.
    [Parsed_overlay_4 @ 0152ca80] Buffer queue overflow, dropping.
    Last message repeated 30 times
    frame= 1130 fps=161 q=2.0 size= 7789kB time=00:01:22.19 bitrate= 776.3kbits/s
    frame= 1217 fps=162 q=2.0 size= 8372kB time=00:01:27.68 bitrate= 782.1kbits/s
    frame= 1306 fps=163 q=2.0 size= 9074kB time=00:01:32.86 bitrate= 800.5kbits/s
    frame= 1393 fps=163 q=1.6 size= 9700kB time=00:01:38.41 bitrate= 807.3kbits/s
    frame= 1475 fps=163 q=2.0 size= 10278kB time=00:01:44.03 bitrate= 809.4kbits/s
    frame= 1568 fps=164 q=2.0 size= 10825kB time=00:01:48.52 bitrate= 817.1kbits/s
    frame= 1658 fps=165 q=2.0 size= 11439kB time=00:01:53.44 bitrate= 826.0kbits/s
    frame= 1734 fps=165 q=2.0 size= 12027kB time=00:01:58.31 bitrate= 832.7kbits/s
    frame= 1792 fps=162 q=2.0 size= 12579kB time=00:02:03.41 bitrate= 835.0kbits/s
    frame= 1851 fps=160 q=2.0 size= 13284kB time=00:02:10.74 bitrate= 832.3kbits/s
    frame= 1929 fps=160 q=2.0 size= 13922kB time=00:02:16.85 bitrate= 833.3kbits/s
    frame= 2010 fps=160 q=2.0 size= 14652kB time=00:02:23.39 bitrate= 837.1kbits/s
    frame= 2102 fps=161 q=2.0 size= 15329kB time=00:02:28.86 bitrate= 843.6kbits/s
    frame= 2200 fps=162 q=2.0 size= 15963kB time=00:02:34.08 bitrate= 848.7kbits/s
    frame= 2292 fps=163 q=2.0 size= 16554kB time=00:02:38.96 bitrate= 853.1kbits/s
    frame= 2378 fps=163 q=2.0 size= 17157kB time=00:02:44.50 bitrate= 854.4kbits/s
    frame= 2468 fps=164 q=2.0 size= 17826kB time=00:02:49.50 bitrate= 861.5kbits/s
    frame= 2564 fps=165 q=2.0 size= 18489kB time=00:02:54.43 bitrate= 868.3kbits/s
    Buffer queue overflow, dropping.
    [Parsed_overlay_4 @ 0152ca80] Buffer queue overflow, dropping.
    Last message repeated 15 times
    frame= 2647 fps=165 q=2.0 size= 19079kB time=00:02:59.53 bitrate= 870.6kbits/s
    frame= 2728 fps=165 q=2.0 Lsize= 19703kB time=00:03:04.13 bitrate= 876.6kbits/
    s video:19006kB audio:567kB subtitle:0 global headers:0kB muxing overhead 0.663315%

    Everything is working fine except that we want audio from both videos playing together in final overlayed file. I would be highly grateful if you can help in this and let me know if its possible to do via ffmpeg or not.

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