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• Search For Specific Values Result in Python

  5 mai 2020, par jamlot

  I am attempting to write a Python script that looks for black video and silent audio in a file, and returns only the time instances when they occur.

  



  I have the following code working using the ffmpeg-python wrapper, but I can't figure out an efficient way to parse the stdout or stderror to return only the instances of black_start, black_end, black_duration, silence_start, silence_end, silence_duration.

  



  Putting ffmpeg aside for those who are not experts, how can I use re.findall or similar to define the regex to return only the above values ?

  



  import ffmpeg 

input = ffmpeg.input(source)
video = input.video.filter('blackdetect', d=0, pix_th=0.00)
audio = input.audio.filter('silencedetect', d=0.1, n='-60dB')
out = ffmpeg.output(audio, video, 'out.null', format='null')
run = out.run_async(pipe_stdout=True, pipe_stderr=True)
result = run.communicate()

print(result)


  



  This results in the ffmpeg output, which contains the results I need. Here is the output (edited for brevity) :

  



  (b'', b"ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with Apple clang version 11.0.0 (clang-1100.0.33.17)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_3 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags=-fno-stack-check --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/otoolej/Documents/_lab/source/black-silence-detect/AUUV71900381_test.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    creation_time   : 2019-11-14T04:12:49.000000Z
  Duration: 00:03:50.28, start: 0.000000, bitrate: 185168 kb/s
    Stream #0:0(eng): Video: prores (HQ) (apch / 0x68637061), yuv422p10le(tv, bt709, progressive), 1920x1080, 183596 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 25 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 2019-11-14T04:12:49.000000Z
      handler_name    : Apple Video Media Handler
      encoder         : Apple ProRes 422 (HQ)
      timecode        : 00:00:00:00
    Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
    Metadata:
      creation_time   : 2019-11-14T04:12:49.000000Z
      handler_name    : Apple Sound Media Handler
      timecode        : 00:00:00:00
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74) (default)
    Metadata:
      creation_time   : 2019-11-14T04:12:49.000000Z
      handler_name    : Time Code Media Handler
      timecode        : 00:00:00:00
Only '-vf blackdetect=d=0:pix_th=0.00' read, ignoring remaining -vf options: Use ',' to separate filters
Only '-af silencedetect=d=0.1:n=-60dB' read, ignoring remaining -af options: Use ',' to separate filters
Stream mapping:
  Stream #0:0 -> #0:0 (prores (native) -> wrapped_avframe (native))
  Stream #0:1 -> #0:1 (pcm_s16le (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
Output #0, null, to 'pipe:':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    encoder         : Lavf58.29.100
    Stream #0:0(eng): Video: wrapped_avframe, yuv422p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 2019-11-14T04:12:49.000000Z
      handler_name    : Apple Video Media Handler
      timecode        : 00:00:00:00
      encoder         : Lavc58.54.100 wrapped_avframe
    Stream #0:1(eng): Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s (default)
    Metadata:
      creation_time   : 2019-11-14T04:12:49.000000Z
      handler_name    : Apple Sound Media Handler
      timecode        : 00:00:00:00
      encoder         : Lavc58.54.100 pcm_s16le
[silencedetect @ 0x7fdd82d011c0] silence_start: 0
frame=  112 fps=0.0 q=-0.0 size=N/A time=00:00:05.00 bitrate=N/A speed=9.96x    
[blackdetect @ 0x7fdd82e06580] black_start:0 black_end:5 black_duration:5
[silencedetect @ 0x7fdd82d011c0] silence_end: 5.06285 | silence_duration: 5.06285
frame=  211 fps=210 q=-0.0 size=N/A time=00:00:09.00 bitrate=N/A speed=8.97x    
frame=  319 fps=212 q=-0.0 size=N/A time=00:00:13.00 bitrate=N/A speed=8.63x    
frame=  427 fps=213 q=-0.0 size=N/A time=00:00:17.08 bitrate=N/A speed=8.51x    
frame=  537 fps=214 q=-0.0 size=N/A time=00:00:22.00 bitrate=N/A speed=8.77x    
frame=  650 fps=216 q=-0.0 size=N/A time=00:00:26.00 bitrate=N/A speed=8.63x    
frame=  761 fps=217 q=-0.0 size=N/A time=00:00:31.00 bitrate=N/A speed=8.82x    
frame=  874 fps=218 q=-0.0 size=N/A time=00:00:35.00 bitrate=N/A speed=8.71x    
frame=  980 fps=217 q=-0.0 size=N/A time=00:00:39.20 bitrate=N/A speed=8.67x    
...  
frame= 5680 fps=213 q=-0.0 size=N/A time=00:03:47.20 bitrate=N/A speed=8.53x    
[silencedetect @ 0x7fdd82d011c0] silence_start: 227.733
[silencedetect @ 0x7fdd82d011c0] silence_end: 229.051 | silence_duration: 1.3184
[silencedetect @ 0x7fdd82d011c0] silence_start: 229.051
[blackdetect @ 0x7fdd82e06580] black_start:229.28 black_end:230.24 black_duration:0.96
frame= 5757 fps=214 q=-0.0 Lsize=N/A time=00:03:50.28 bitrate=N/A speed=8.54x    
video:3013kB audio:43178kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
[silencedetect @ 0x7fdd82d011c0] silence_end: 230.28 | silence_duration: 1.22856
\n")


  



  What is the most efficient way to parse the output data to find/return only those result values so I can build further logic from them in my code ? In this case, I would want only the following values returned :

  



  silence_start : 0
  
silence_end : 5.06285
  
silence_duration : 5.06285

  



  black_start:0
  
black_end:5
  
black_duration:5

  



  silence_start : 227.733
  
silence_end : 229.051
  
silence_duration : 1.3184

  



  black_start:229.28
  
black_end:230.24
  
black_duration:0.96

  



  silence_start : 229.051
  
silence_end : 230.28
  
silence_duration : 1.22856

  



  I think there is a way to get only those values using ffprobe, but I couldn't get that to work within the wrapper method. Possible I would have to run ffprobe as a subprocess and parse that result somehow. That would be a total re-do though.

  


• avformat/ftp: use correct enum type

  20 août 2015, par Ganesh Ajjanagadde

  avformat/ftp: use correct enum type
  Fixes -Wenum-conversion from
  
  http://fate.ffmpeg.org/report.cgi?time=20150820031140&slot=arm64-darwin-clang-apple-5.1
  Signed-off-by : Ganesh Ajjanagadde <gajjanagadde@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/ftp.c

• Making a timelapse by drag and drop - A rebuild of an old script using ImageMagick

  14 août 2019, par cursor_major

  I have written an apple script previously to automate a task I do in my work many times.

  I shoot Raw + JPG in camera, copy to hard drive.

  I then drag named and dated folder eg. "2019_08_14_CAM_A_CARD_01" on to an automator app and it divides the files in to folders "NEF" and "JPG" respectively.

  I then drag the appropriate "JPG" folder onto my Timelapse app and it runs the image sequence process in QT7 and then saves the file with the parent folder name in the grandparent folder. This keeps things super organised for when I want to re link to the original RAW files.

  [code below]

  It is a 2 step process and works well for my needs, however, Apple are going to be resigning Quicktime 7 Pro so my app has a foreseeable end of life.

  I want to take this opportunity to refine and improve the process using terminal and ImageMagick.

  I have managed to work some code that runs well in terminal, but I have to navigate to the folder first then run a script. It doesn’t do the file renaming and doesn’t save in the right place.

  Also, when I try and run the simple script in an automator ’App’ it throws up errors even before trying to add anything clever with the file naming.

  Later, once I have recreated my timelapse. maker app I want to get clever with more of ImageMagicks commands and overlay a small super of the original frame name in the corner so I can expedite my reconnecting workflow.

  I’m sorry, I’m a photographer not a coder but I’ve been bashing my head trying to work this out and I’ve hit a brick wall.

  File Sorter

      repeat with d in dd
  
          do shell script "d=" & d's POSIX path's quoted form & "
  
  cd \"$d\" || exit
  
  
  
  mkdir -p {MOV,JPG,NEF,CR2}
  
  find . -type f -depth 1 -iname '*.mov' -print0 | xargs -0 -J % mv % MOV
  
  find . -type f -depth 1 -iname '*.cr2' -print0 | xargs -0 -J % mv % CR2
  
  find . -type f -depth 1 -iname '*.jpg' -print0 | xargs -0 -J % mv % JPG
  
  find . -type f -depth 1 -iname '*.nef' -print0 | xargs -0 -J % mv % NEF
  
  
  
  for folder in `ls`; 
  
  do if [ `ls $folder | wc -l` == 0 ]; then 
  
      rmdir $folder;
  
  fi; done;
  
  
  
  "
  
      end repeat
  
  end open```
  
  
  
  
  
  
  
  Timelapse Compiler
  
  
  
  ```on run {input, parameters}
  
      repeat with d in input
  
          set d to d's contents
  
          tell application "Finder"
  
              set seq1 to (d's file 1 as alias)
  
              set dparent to d's container as alias
  
              set mov to "" & dparent & (dparent's name) & ".mov"
  
          end tell
  
          tell application "QuickTime Player 7"
  
              activate
  
              open image sequence seq1 frames per second 25
  
              tell document 1
  
                  with timeout of 500 seconds
  
                      save self contained in file mov
  
                  end timeout
  
                  quit
  
              end tell
  
          end tell
  
      end repeat
  
      return input
  
  end run```
  
  
  
  
  
  Current code that runs from within Terminal after I have navigated to folder of JPGs
  
  
  
  ```ffmpeg -r 25 -f image2 -pattern_type glob -i '*.JPG' -codec:v prores_ks -profile:v 0 imagemagick_TL_Test_01.mov```