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• reading lines from txt file into .csv

  7 janvier 2014, par Dynamite Media

  i have a .TXT file i created via batch file using ffmpeg. it returns the following info ( more but trying to make short)

  major_brand=isom 
  
  minor_version=512 
  
  compatible_brands=isomiso2avc1mp41 
  
  creation_time=1970-01-01 00:00:00 
  
  encoder=Lavf53.19.0 
  
  genre=sport 
  
  track=1 
  
  title=IRWX_TV_Vol_01_1_Pt_4 
  
  episode_id=0101 

  the .TXT file comes back with 3 of these above. well i want to be able to only use some of the info above and then i want to create a .CSV file so that i can load into .XLS file

  I have used the following and it's close :

  REM now lets get info we need from result.txt
  
  pause 
  
  
  
  REM checks how many times finds genre and loops that many times
  
  FOR /f "delims=" %%b IN ('findstr "genre" result.txt') DO (
  
  for %%f in (result.txt) do (
  
      set i=0
  
  
  
  for /F "delims= tokens=2,3*" %%l in (%%f) do (
  
      set /A i+=1
  
      set line!i!=%%l
  
  
  
  )
  
  echo  !line9!, !line6!, !line8!,  >> result.csv
  
  )
  
  ) 
  
  pause 

  and this is coming back with the following :

   title=IRWX_TV_Vol_01_1_Pt_4 , genre=sport, episode_id=0101
  
   title=IRWX_TV_Vol_01_1_Pt_4 , genre=sport, episode_id=0101
  
   title=IRWX_TV_Vol_01_1_Pt_4 , genre=sport, episode_id=0101

  ONLY the 1st video title from .TXT file and not each of them

  AND i would prefer it to come back like this :

   IRWX_TV_Vol_01_1_Pt_4,sport,0101

  Minus the variables, the "=" and the space issues you see above.

  i have been going over and over this trying different things and it is just not working.

  Hopefully someone here can see the issue and help out, Thanks

• Can you put the result of a blackdetect filter in a textfile using ffmpeg ?

  9 mars 2017, par Gijserman

  I’m testing out the "blackdetect" filter in ffmpeg. I want to have the times when the video is black to be read by a script (like actionscript or javascript). I tried :

  ffmpeg -i video1.mp4 -vf "blackdetect=d=2:pix_th=0.00" -an -f null -

  And I get a nice result in the ffmpeg log :

  ffmpeg version N-55644-g68b63a3 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Aug 19 2013 20:32:00 with gcc 4.7.3 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
  ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
  
  amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
  
  enable-libxvid --enable-zlib
  
    libavutil      52. 42.100 / 52. 42.100
  
    libavcodec     55. 28.100 / 55. 28.100
  
    libavformat    55. 13.103 / 55. 13.103
  
    libavdevice    55.  3.100 / 55.  3.100
  
    libavfilter     3. 82.100 /  3. 82.100
  
    libswscale      2.  5.100 /  2.  5.100
  
    libswresample   0. 17.103 /  0. 17.103
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video1.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      creation_time   : 1970-01-01 00:00:00
  
      encoder         : Lavf53.13.0
  
    Duration: 00:02:01.54, start: 0.000000, bitrate: 275 kb/s
  
      Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 768x432 [
  
  SAR 1:1 DAR 16:9], 211 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : VideoHandler
  
      Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 59
  
   kb/s
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : SoundHandler
  
  Output #0, null, to 'pipe:':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf55.13.103
  
      Stream #0:0(eng): Video: rawvideo (I420 / 0x30323449), yuv420p, 768x432 [SAR
  
   1:1 DAR 16:9], q=2-31, 200 kb/s, 90k tbn, 25 tbc
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : VideoHandler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> rawvideo)
  
  Press [q] to stop, [?] for help
  
  [null @ 00000000003279a0] Encoder did not produce proper pts, making some up.
  
  [blackdetect @ 0000000004d5e800] black_start:0 black_end:17.08 black_duration:17
  
  .08
  
  [blackdetect @ 0000000004d5e800] black_start:62.32 black_end:121.48 black_durati
  
  on:59.16
  
  frame= 3038 fps=2317 q=0.0 Lsize=N/A time=00:02:01.52 bitrate=N/A
  
  video:285kB audio:0kB subtitle:0 global headers:0kB muxing overhead -100.007543%

  And I’m particularly interested in this part :

  [blackdetect @ 0000000004e2e340] black_start:0 black_end:17.08 black_duration:17.08
  
  [blackdetect @ 0000000004e2e340] black_start:62.32 black_end:121.48 black_duration:59.16

  So my question :

  1. Is there a way to only take the blackdetect filter output and put it in a .txt file ?
  2. And if this is possible, is there a way to do this in a statement with multiple video inputs ? Like in this example

  ---

  example :

  ffmpeg -f concat -i mylist.txt -c copy concat.mp4

  Where mylist.txt is a list of videos :

  file 'video1.mp4'
  
  file 'video2.mp4'
  
  file 'video3.mp4'
  
  file 'video4.mp4'

  ---

  Basically what I want to have is one or more text files containing information about the black frames in every video in this list to be used by another program

• Merge video files using Concat filter in FFmpeg

  8 juillet 2013, par vijay

  I am using FFmpeg to concat video files of different codecs in my android application.
  I read the FFmpeg documentation and tried the following things.

  1. ffmpeg -i "concat:input1.mpg|input2.mpg" -c copy output.mp4 (works only for mpg files)

  2. ffmpeg -i 1.mp4 -c copy -bsf dump_extra 1.ts
  
     ffmpeg -i 2.mp4 -c copy -bsf dump_extra 2.ts
  
     ffmpeg -i "concat:1.ts|2.ts" -c copy output.mp4 (works for mp4 files)

  I tried both the methods for 3gp files but it throws an error in stream filters.The second method stores the .ts files in device that should not be done and also i lost the quality of the video.

  When i googled it out i found that FFmpeg provides a way to concat files with different codecs.So i tried the following command to this in a single step without storing files in device.

  fmpeg -i 1.mp4 -i 2.3gp -i 3.mpg -filter_complex '[0:0] [0:1] [1:0] [1:1]
  
   [2:0] [2:1] concat=n=3:v=1:a=1 [a] [v] ' -map '[a]' -map '[v]' -c copy output.mp4 

  It throws the following exception :

  ffmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jun 25 2013 20:34:51 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  
    configuration: 
  
    libavutil      52. 18.100 / 52. 18.100
  
    libavcodec     54. 92.100 / 54. 92.100
  
    libavformat    54. 63.104 / 54. 63.104
  
    libavdevice    54.  3.103 / 54.  3.103
  
    libavfilter     3. 42.103 /  3. 42.103
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
  F.mp4: No such file or directory
  
  tsk@tsk:~/Android/Backups/android-ffmpeg-x264/Project/jni$ ffmpeg -i 1.mp4 -i 2.mp4 -filter_complex '[0:1] [0:0] [1:1] [1:0] concat=n=2:v=1:a=1 [v] [a]' -map '[v]' -map '[a]' output.mp4
  
  ffmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jun 25 2013 20:34:51 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  
    configuration: 
  
    libavutil      52. 18.100 / 52. 18.100
  
    libavcodec     54. 92.100 / 54. 92.100
  
    libavformat    54. 63.104 / 54. 63.104
  
    libavdevice    54.  3.103 / 54.  3.103
  
    libavfilter     3. 42.103 /  3. 42.103
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: mp41
  
      creation_time   : 1970-01-01 00:00:00
  
    Duration: 00:00:04.04, start: 0.000000, bitrate: 1457 kb/s
  
      Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 1454 kb/s, SAR 349:320 DAR 349:240, 25 fps, 25 tbr, 25 tbn, 25 tbc
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : VideoHandler
  
  Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '2.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: mp41
  
      creation_time   : 1970-01-01 00:00:00
  
    Duration: 00:00:04.04, start: 0.000000, bitrate: 1498 kb/s
  
      Stream #1:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 1495 kb/s, SAR 349:320 DAR 349:240, 25 fps, 25 tbr, 25 tbn, 25 tbc
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : VideoHandler
  
  Stream specifier ':1' in filtergraph description [0:1] [0:0] [1:1] [1:0] concat=n=2:v=1:a=1 [v] [a] matches no streams.

  I googled out but found no solution yet.

  Any help is appreciated.