Recherche avancée

Sur d’autres sites (9656)

• Your guide to cookies, web analytics, and GDPR compliance

  25 février 2020, par Joselyn Khor — Analytics Tips, Privacy, Security
  It’s been almost two years since the GDPR came into effect and turned the online world on its head. Confusion around cookies/cookie consent/cookie compliance remains till today. So we’d like to take this chance to talk more about the supposed “big bad” of the latest century. 

  Online cookies seem to have a bad reputation, but are they as bad as they seem ?

  To start, what are cookies on the internet ?

  An internet cookie a.k.a. an HTTP cookie, is a small piece of data sent from websites that is stored on your computer or mobile when you visit that site.

  Are all cookies bad ?

  No. Cookies themselves are usually harmless as they can’t infect computers with malware. 

  They can also be helpful for both websites who use them and individuals visiting those websites. For example, when online shopping, cookies on ecommerce sites keep track of what you’re shopping for. If you didn’t have that tracking, your cart would be empty every time you moved away from that site.

  For businesses/websites, cookies can be used for authentication (logins) and tracking website user experience. For example, tracking multiple visits to the same site in order to provide better experiences to customers visiting their website.

  

  The not-so-sweet types of cookies :

  Cookies that contain personal data

  Another example of a bad cookie is when cookies contain personal data directly in the cookie itself. For example, when websites store demographics or your name in a cookie ; or when a website stores survey results in a cookie. Use of cookies in these ways is considered bad practice nowadays.

  Third-party cookies
  

  They can be used by websites to learn about your visit and activity across multiple websites. Cookies can enter harmful territory when employed for “big brother” types of tracking i.e. when they’re used to build a virtual fingerprint of individuals after their activity is tracked from website to website. For example most advertising networks create third party cookies in your browser when you view an ad, which lets these advertisers track users across these websites and let companies buy more targeted ads.

  Why does Matomo use cookies ?

  

  For accurate reporting of new and returning visitors. Matomo uses cookies to store some information about visitors between visits. We also use cookies to remember if someone gave consent to tracking, or opted out of tracking. 

  Types of cookies Matomo uses :

  • Matomo by default uses first-party cookies, set on the domain of your site.
  • Cookies created by Matomo start with : _pk_ref, _pk_cvar, _pk_id, _pk_ses. See a list of all Matomo cookies : https://matomo.org/faq/general/faq_146/

  Cookie-less tracking - disable cookies and ensure cookie compliance :

  It’s possible to disable tracking cookies in Matomo by adding a line on the javascript code. When cookies are disabled, Matomo data will become slightly less accurate. Also, when cookies are disabled, there may still be a few cookies created in specific cases.

  If you disable cookies, Matomo tries to detect unique visitors by a fingerprint based on a few browser attributes : operating system, browser, browser plugins, IP address and browser language.

  By disabling tracking cookies, you may also use Matomo without needing to display a cookie consent screen. You can also keep tracking when they reject cookie consent by keeping cookies disabled.

  Cookies and the GDPR

  In some countries and according to the GDPR, websites need to provide a way for users to opt-out of all tracking, in particular tracking cookies.

  The GDPR regulates the use of cookies when they compromise an individual’s privacy. When cookies can identify an individual, it is considered personal data.

  

  Cookie compliance and the GDPR

  To be GDPR compliant you must :

  • Receive user consent before using any cookies (except strictly necessary cookies). Read more on cookies that are “clearly exempt from consent”.
  • Provide accurate and specific information about the data each cookie tracks and its purpose in plain language before consent is received.
  • Document and store consent received from users.
  • Allow users to access your service even if they refuse to allow the use of certain cookies
  • Make it as easy for users to withdraw their consent as it was for them to give their consent in the first place.

  Source : https://gdpr.eu/cookies/

  When does GDPR require cookie consent ?

  The purpose of the GDPR is to give individuals control over their personal data. As such this regulation has provisions and requirements which regulate the processing of personal data to protect the privacy of individuals. 

  This means in order to use cookies, you will sometimes need explicit consent from those individuals.

  When does GDPR not require cookie consent ?

  Then there are many cookies that generally do NOT require consent (Source : https://wikis.ec.europa.eu/display/WEBGUIDE/04.+Cookies). 

  These are :

  • user input cookies, for the duration of a session
  • authentication cookies, for the duration of a session
  • user-centric security cookies, used to detect authentication abuses and linked to the functionality explicitly requested by the user, for a limited persistent duration
  • multimedia content player session cookies, such as flash player cookies, for the duration of a session
  • load balancing session cookies and other technical cookies, for the duration of session
  • user interface customisation cookies, for a browser session or a few hours, when additional information in a prominent location is provided (e.g. “uses cookies” written next to the customisation feature)

  Tracking cookies and consent vs legitimate interest

  

  User consent is not always required :

  We understand that whenever you collect and process personal data, you need – almost always – to ask for their consent. However, there are instances where you have to process data under “legitimate interests”. The GDPR states that processing of personal data is lawful “if processing is necessary for the purposes of the legitimate interests”. This means if you have “legitimate interests” you can avoid asking for consent for collecting and processing personal information. Learn more : https://cookieinformation.com/resources/blog/what-is-legitimate-interest-under-the-gdpr 

  A lawful basis for processing personal data (proceeding with caution) :

  We’ve also written about having a lawful basis for processing personal data under GDPR with Matomo. The caveat here is you need to have a strong argument for legitimate interests. If you are processing personal data which may represent a risk to the final user, then getting consent is, for us, still the right lawful basis. If you are not sure, at the time of writing ICO is providing a tool in order to help you make this decision.

  How is Matomo Analytics GDPR compliant ?

  Matomo can be configured to automatically anonymise data so you don’t process any personal data. This allows you to completely avoid GDPR. If you decide to process personal data, Matomo provides you with 12 steps to easily comply with the GDPR guidelines.

  New developments on cookies and the GDPR

  In the early days of the GDPR, a spate of cookie management platforms (CMPs) popped up to help websites and people comply with GDPR rules around cookies.

  These have become problematic in recent years. Europe’s highest court ruled pre-checked box for cookie boxes does not give enough consent. 

  As well as that, new research suggests most cookie consent pop-ups in the EU fall short of GDPR. A new study called, ‘Dark Patterns after the GDPR’ from MIT, UCL and Aarhus University found that a vast majority of websites aren’t following GDPR rules around cookies. The study found most cookie consent pop-ups in the EU to be undermining the GDPR by finding sneaky ways to convince website visitors to click ‘accept’.

  Disclaimer

  We are not lawyers and don’t claim to be. The information provided here is to help give an introduction to issues you may encounter when dealing cookies. We encourage every business and website to take data privacy seriously and discuss these issues with your lawyer if you have any concerns. 

  Additional resources :

  • How do the cookie rules relate to the GDPR ? 
  • Cookies, the GDPR, and the ePrivacy Directive

• stream 0, timescale not set when concat video using ffmpeg

  17 février 2018, par no name

  I have 2 video which i want to add them together so i make a text file which contains the file names

  file No-fade_25fps.mp4
  
  file video.mp4

  then i start using this command

  ffmpeg -f concat -i ffmpeg-sound.txt -c copy final_output.mp4

  the problem is i got this from ffmpeg

      [mov,mp4,m4a,3gp,3g2,mj2 @ 0561dbc0] stream 0, timescale not set
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0561dbc0] Auto-inserting h264_mp4toannexb bitstream filter
  
  Input #0, concat, from 'out.txt':
  
    Duration: N/A, start: 0.000000, bitrate: 464 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 464 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
  
      Metadata:
  
        creation_time   : 2018-02-09T10:36:18.000000Z
  
        handler_name    : Core Media Video
  
      Stream #0:1: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1280x720 [SAR 72:72 DAR 16:9], 90k tbr, 90k tbn, 90k tbc
  
  Output #0, mp4, to 'final_output.mp4':
  
    Metadata:
  
      encoder         : Lavf58.7.100
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 464 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc
  
      Metadata:
  
        creation_time   : 2018-02-09T10:36:18.000000Z
  
        handler_name    : Core Media Video
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
  Press [q] to stop, [?] for help
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 05c3e940] Auto-inserting h264_mp4toannexb bitstream filter
  
  frame= 8194 fps=0.0 q=-1.0 Lsize=    2254kB time=46:35:51.68 bitrate=   0.1kbits/s speed=1.19e+006x
  
  video:2157kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 4.486598%

  the result give me a video mp4 file with a long duration like 46:33:20 and it not work, and iam sure that both videos have same reslution.
  what i tried is to use this command to convert the video

  ffmpeg -y -i No-fade_25fps.mp4 -r 25 -s 1280x720 -c:v libx264 -b:v 3M -strict -2 -movflags faststart destination.mp4

  and when i concate them again it worked and give me result mp4 file which have a right duration and worked fine but without a sound, because the first video file i use is muted no sound in it and second one contains a sound.
  my question is how to concate those videos togther without this problem also what make the video have the problem of this long duration and when i convert them using the command line it worked ?
  first video info which is No-fade_25fps.mp4

      [mov,mp4,m4a,3gp,3g2,mj2 @ 03e05000] stream 0, timescale not set
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'No-fade_25fps.mp4':
  
    Metadata:
  
      major_brand     : M4V
  
      minor_version   : 1
  
      compatible_brands: M4V M4A mp42isom
  
      creation_time   : 2018-02-09T10:36:18.000000Z
  
      keywords        : tunepro,orange
  
      album_artist    : Kiran Khan
  
      description     : This video is about new tunepro
  
      artist          : Kiran Khan
  
      title           : new tunepro
  
    Duration: 00:00:06.48, start: 0.000000, bitrate: 497 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 464 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc (default)
  
      Metadata:
  
        creation_time   : 2018-02-09T10:36:18.000000Z
  
        handler_name    : Core Media Video
  
      Stream #0:1: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1280x720 [SAR 72:72 DAR 16:9], 90k tbr, 90k tbn, 90k tbc
  
  At least one output file must be specified

  second video video.mp4

      Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.7.100
  
    Duration: 00:05:21.28, start: 0.000000, bitrate: 181 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc), 1280x720 [SAR 1:1 DAR 16:9], 45 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: mp3 (mp4a / 0x6134706D), 44100 Hz, stereo, s16p, 127 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler

  what i want is to add any number of videos togthers without a problems like this they all have same reslution and frame per second is there something else need to be checked before i start merge videos ?
  Update
  this what i get when i use the command without copy codec

  [mov,mp4,m4a,3gp,3g2,mj2 @ 058ddb80] stream 0, timescale not set
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 058ddb80] Auto-inserting h264_mp4toannexb bitstream filter
  
  Input #0, concat, from 'out.txt':
  
    Duration: N/A, start: 0.000000, bitrate: 464 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 464 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
  
      Metadata:
  
        creation_time   : 2018-02-09T10:36:18.000000Z
  
        handler_name    : Core Media Video
  
      Stream #0:1: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1280x720 [SAR 72:72 DAR 16:9], 90k tbr, 90k tbn, 90k tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 05937d00] using SAR=1/1
  
  [libx264 @ 05937d00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 05937d00] profile High, level 3.1
  
  [libx264 @ 05937d00] 264 - core 155 r2901 7d0ff22 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'final_output.mp4':
  
    Metadata:
  
      encoder         : Lavf58.7.100
  
      Stream #0:0(und): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc
  
      Metadata:
  
        creation_time   : 2018-02-09T10:36:18.000000Z
  
        handler_name    : Core Media Video
  
        encoder         : Lavc58.9.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 058ddb80] Auto-inserting h264_mp4toannexb bitstream filtered=3.41x
  
  More than 1000 frames duplicated

  and it stop like it’s in infinite loop

• Generating video from images and audio by FFmpeg

  24 mars 2020, par Cody

  I am new to FFmpeg and video/audio encoding. I try to use Fluent ffmpeg to generate a MP4 video from images and audio.

  There are 2 inputs only :

  • JPG images with filename NOT in numbering sequence (e.g. foo.jpg, bar.jpg)
  • .wav audio

  If the audio duration is longer video length, just discard the excessive part of audio at the end.
  And all the images have to be shown in same duration.(i.e. The video should be in n/d FPS for n images and video with d second)

  Since the image input are not in number sequence, I use concat demuxer as input :

          let VIDEO_DURATION = 8;
  
          let ffmpeg = await FfmpegUtil.createCommand();
  
          let imageFiles: string[] = ["foo.jpg", "bar.jpg", ...]; //assume there are 67 image files
  
          let demuxerFile = await FfmpegUtil.createConcatDemuxerFile(imageFiles);
  
          let audioFile: string = "path/to/audio.wav";
  
  
  
          ffmpeg.input(demuxerFile)
  
              .inputOption(
  
                  "-f", "concat",
  
                  "-safe", "0",
  
              )
  
              .input(audioFile)
  
              .outputOption(
  
                  "-r", `${imageFiles.length}/${VIDEO_DURATION}`,
  
              )
  
              .duration(VIDEO_DURATION)
  
              .save("path/to/output.mp4")
  
          ;

  it will spawn a ffmpeg command :

  ffmpeg 
  
      -f concat 
  
      -safe 0 
  
      -i path/to/demuxerFile.txt 
  
      -i path/to/audio.wav 
  
      -y 
  
      -r 67/8
  
      -t 8 
  
      path/to/output.mp4

  However the output file cannot be played.

  I also tried "-framerate", ${imageFiles.length}/${VIDEO_DURATION} in .outputOption(), it still output a file cannot be played and I found the frame rate always be 25 in its file property.

  Update 1 (added spawned command & ffmpeg console log) :

  spawned ffmpeg command & console log ("-r", `${imageFiles.length}/${VIDEO_DURATION}` as outputOption) :

  ffmpeg -f concat -safe 0 -i path/to/demuxerFile.txt -i path/to/audio.wav -y -r 67/8 -t 8 path/to/output_r.mp4
  
  
  
  ffmpeg version git-2020-01-26-5e62100 Copyright (c) 2000-2020 the FFmpeg developers
  
    built with gcc 9.2.1 (GCC) 20200122
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  
    libavutil      56. 38.100 / 56. 38.100
  
    libavcodec     58. 67.100 / 58. 67.100
  
    libavformat    58. 36.100 / 58. 36.100
  
    libavdevice    58.  9.103 / 58.  9.103
  
    libavfilter     7. 71.100 /  7. 71.100
  
    libswscale      5.  6.100 /  5.  6.100
  
    libswresample   3.  6.100 /  3.  6.100
  
    libpostproc    55.  6.100 / 55.  6.100
  
  Input #0, concat, from 'path/to/demuxerFile.txt':
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: mjpeg (Baseline), yuvj444p(pc, bt470bg/unknown/unknown), 4677x4677 [SAR 256:256 DAR 1:1], 25 tbr, 25 tbn, 25 tbc
  
  Guessed Channel Layout for Input Stream #1.0 : stereo
  
  Input #1, wav, from 'path/to/audio.wav':
  
    Metadata:
  
      artist          : TextAloud: IVONA Kimberly22
  
      date            : 2018
  
      genre           : Speech
  
      title           : 38750336.mp3
  
      album           : Created: 7/26/2018 4:56:13 PM
  
      encoder         : Lavf58.16.100
  
      encoded_by      : Lame MP3
  
    Duration: 00:00:15.57, bitrate: 705 kb/s
  
      Stream #1:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, stereo, s16, 705 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
    Stream #1:0 -> #0:1 (pcm_s16le (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 000001e395041400] using SAR=1/1
  
  [libx264 @ 000001e395041400] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 000001e395041400] profile High 4:4:4 Predictive, level 6.0, 4:4:4, 8-bit
  
  [libx264 @ 000001e395041400] 264 - core 159 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=8 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'path/to/output_r.mp4':
  
    Metadata:
  
      encoder         : Lavf58.36.100
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuvj444p(pc, progressive), 4677x4677 [SAR 256:256 DAR 1:1], q=-1--1, 8.38 fps, 17152 tbn, 8.38 tbc
  
      Metadata:
  
        encoder         : Lavc58.67.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
  
      Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 22050 Hz, stereo, fltp, 128 kb/s
  
      Metadata:
  
        encoder         : Lavc58.67.100 aac
  
  frame=    3 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=    5 fps=4.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=4 speed=   0x    
  
  frame=    6 fps=3.4 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=7 speed=   0x    
  
  frame=    8 fps=3.4 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=10 speed=   0x    
  
  frame=   10 fps=3.5 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=14 speed=   0x    
  
  frame=   11 fps=3.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=16 speed=   0x    
  
  frame=   13 fps=3.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=20 speed=   0x    
  
  frame=   14 fps=3.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=22 speed=   0x    
  
  frame=   16 fps=3.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=26 speed=   0x    
  
  frame=   17 fps=2.9 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=28 speed=   0x    
  
  frame=   18 fps=2.8 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=31 speed=   0x    
  
  frame=   20 fps=2.9 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=34 speed=   0x    
  
  frame=   21 fps=2.8 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=36 speed=   0x    
  
  frame=   23 fps=2.9 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=40 speed=   0x    
  
  frame=   24 fps=2.8 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=42 speed=   0x    
  
  frame=   24 fps=0.7 q=-1.0 Lsize=     752kB time=00:00:08.03 bitrate= 766.4kbits/s dup=0 drop=43 speed=0.22x    
  
  video:624kB audio:125kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.359236%
  
  [libx264 @ 000001e395041400] frame I:1     Avg QP:12.79  size:257554
  
  [libx264 @ 000001e395041400] frame P:15    Avg QP:13.10  size: 20487
  
  [libx264 @ 000001e395041400] frame B:8     Avg QP:13.10  size:  9231
  
  [libx264 @ 000001e395041400] consecutive B-frames: 45.8% 25.0% 12.5% 16.7%
  
  [libx264 @ 000001e395041400] mb I  I16..4: 18.4% 79.2%  2.4%
  
  [libx264 @ 000001e395041400] mb P  I16..4:  1.0%  3.3%  0.4%  P16..4:  1.0%  0.2%  0.2%  0.0%  0.0%    skip:93.9%
  
  [libx264 @ 000001e395041400] mb B  I16..4:  0.1%  0.2%  0.1%  B16..8:  1.8%  0.1%  0.0%  direct: 2.9%  skip:94.7%  L0:58.1% L1:40.2% BI: 1.7%
  
  [libx264 @ 000001e395041400] 8x8 transform intra:75.0% inter:82.7%
  
  [libx264 @ 000001e395041400] coded y,u,v intra: 6.1% 3.5% 4.4% inter: 0.2% 1.2% 0.5%
  
  [libx264 @ 000001e395041400] i16 v,h,dc,p: 80% 16%  3%  2%
  
  [libx264 @ 000001e395041400] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 46%  8% 44%  0%  0%  0%  0%  0%  0%
  
  [libx264 @ 000001e395041400] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 27% 25%  3%  3%  3%  4%  3%  3%
  
  [libx264 @ 000001e395041400] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 000001e395041400] ref P L0: 75.6%  3.3% 14.8%  6.3%
  
  [libx264 @ 000001e395041400] ref B L0: 88.6% 10.7%  0.7%
  
  [libx264 @ 000001e395041400] ref B L1: 98.7%  1.3%
  
  [libx264 @ 000001e395041400] kb/s:1783.06
  
  [aac @ 000001e3951e7f80] Qavg: 55135.730

  spawned ffmpeg command & console log ("-framerate", `${imageFiles.length}/${VIDEO_DURATION}` as outputOption) :

  ffmpeg -f concat -safe 0 -i path/to/demuxerFile.txt -i path/to/audio.wav -y -framerate 67/8 -t 8 path/to/output_framerate.mp4
  
  
  
  ffmpeg version git-2020-01-26-5e62100 Copyright (c) 2000-2020 the FFmpeg developers
  
    built with gcc 9.2.1 (GCC) 20200122
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  
    libavutil      56. 38.100 / 56. 38.100
  
    libavcodec     58. 67.100 / 58. 67.100
  
    libavformat    58. 36.100 / 58. 36.100
  
    libavdevice    58.  9.103 / 58.  9.103
  
    libavfilter     7. 71.100 /  7. 71.100
  
    libswscale      5.  6.100 /  5.  6.100
  
    libswresample   3.  6.100 /  3.  6.100
  
    libpostproc    55.  6.100 / 55.  6.100
  
  Input #0, concat, from 'path/to/demuxerFile.txt':
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: mjpeg (Baseline), yuvj444p(pc, bt470bg/unknown/unknown), 4677x4677 [SAR 256:256 DAR 1:1], 25 tbr, 25 tbn, 25 tbc
  
  Guessed Channel Layout for Input Stream #1.0 : stereo
  
  Input #1, wav, from 'path/to/audio.wav':
  
    Metadata:
  
      artist          : TextAloud: IVONA Kimberly22
  
      date            : 2018
  
      genre           : Speech
  
      title           : 38750336.mp3
  
      album           : Created: 7/26/2018 4:56:13 PM
  
      encoder         : Lavf58.16.100
  
      encoded_by      : Lame MP3
  
    Duration: 00:00:15.57, bitrate: 705 kb/s
  
      Stream #1:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, stereo, s16, 705 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
    Stream #1:0 -> #0:1 (pcm_s16le (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 000002460bda4740] using SAR=1/1
  
  [libx264 @ 000002460bda4740] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 000002460bda4740] profile High 4:4:4 Predictive, level 6.0, 4:4:4, 8-bit
  
  [libx264 @ 000002460bda4740] 264 - core 159 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'path/to/output_framerate.mp4':
  
    Metadata:
  
      encoder         : Lavf58.36.100
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuvj444p(pc, progressive), 4677x4677 [SAR 256:256 DAR 1:1], q=-1--1, 25 fps, 12800 tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc58.67.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
  
      Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 22050 Hz, stereo, fltp, 128 kb/s
  
      Metadata:
  
        encoder         : Lavc58.67.100 aac
  
  frame=    3 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=    6 fps=5.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=    9 fps=5.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   12 fps=5.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   14 fps=4.6 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   16 fps=4.4 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   18 fps=3.9 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   20 fps=3.9 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   22 fps=3.8 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   23 fps=3.6 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   25 fps=3.6 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   27 fps=3.3 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   28 fps=3.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   30 fps=3.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   33 fps=3.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   36 fps=3.3 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   38 fps=3.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   39 fps=3.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   40 fps=2.6 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   41 fps=2.4 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   42 fps=2.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   43 fps=1.9 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   44 fps=1.9 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   45 fps=1.8 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   46 fps=1.8 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   47 fps=1.4 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   49 fps=1.5 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   50 fps=1.5 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   51 fps=1.5 q=28.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   51 fps=1.3 q=28.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   52 fps=1.3 q=28.0 size=       0kB time=00:00:00.04 bitrate=   8.3kbits/s speed=0.00114x    
  
  frame=   53 fps=1.3 q=28.0 size=       0kB time=00:00:00.04 bitrate=   8.3kbits/s speed=0.00111x    
  
  frame=   54 fps=1.2 q=28.0 size=       0kB time=00:00:00.04 bitrate=   8.3kbits/s speed=0.00101x    
  
  frame=   55 fps=1.2 q=28.0 size=       0kB time=00:00:00.13 bitrate=   2.8kbits/s speed=0.00297x    
  
  frame=   56 fps=1.1 q=28.0 size=       0kB time=00:00:00.18 bitrate=   2.1kbits/s speed=0.00377x    
  
  frame=   57 fps=1.1 q=28.0 size=     256kB time=00:00:00.23 bitrate=9033.3kbits/s speed=0.00461x    
  
  frame=   58 fps=1.1 q=28.0 size=     256kB time=00:00:00.27 bitrate=7527.8kbits/s speed=0.00514x    
  
  frame=   59 fps=1.0 q=28.0 size=     256kB time=00:00:00.32 bitrate=6452.4kbits/s speed=0.00571x    
  
  frame=   60 fps=1.0 q=28.0 size=     256kB time=00:00:00.37 bitrate=5645.8kbits/s speed=0.00643x    
  
  frame=   62 fps=1.0 q=28.0 size=     256kB time=00:00:00.37 bitrate=5645.8kbits/s speed=0.00605x    
  
  frame=   62 fps=1.0 q=28.0 size=     256kB time=00:00:00.41 bitrate=5018.5kbits/s speed=0.00668x    
  
  frame=   63 fps=1.0 q=28.0 size=     256kB time=00:00:00.46 bitrate=4516.7kbits/s speed=0.00727x    
  
  frame=   64 fps=1.0 q=28.0 size=     256kB time=00:00:00.51 bitrate=4106.1kbits/s speed=0.00778x    
  
  frame=   65 fps=1.0 q=28.0 size=     256kB time=00:00:00.55 bitrate=3763.9kbits/s speed=0.00827x    
  
  frame=   66 fps=1.0 q=28.0 size=     256kB time=00:00:00.60 bitrate=3474.4kbits/s speed=0.00884x    
  
  frame=   67 fps=1.0 q=28.0 size=     256kB time=00:00:00.65 bitrate=3226.2kbits/s speed=0.00943x    
  
  frame=   67 fps=0.6 q=-1.0 Lsize=     872kB time=00:00:08.03 bitrate= 888.9kbits/s speed=0.0752x    
  
  video:744kB audio:125kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.391708%
  
  [libx264 @ 000002460bda4740] frame I:1     Avg QP:15.80  size:216204
  
  [libx264 @ 000002460bda4740] frame P:29    Avg QP:15.19  size: 10747
  
  [libx264 @ 000002460bda4740] frame B:37    Avg QP:17.07  size:  6300
  
  [libx264 @ 000002460bda4740] consecutive B-frames: 17.9% 14.9% 31.3% 35.8%
  
  [libx264 @ 000002460bda4740] mb I  I16..4: 11.4% 86.0%  2.6%
  
  [libx264 @ 000002460bda4740] mb P  I16..4:  0.5%  1.9%  0.2%  P16..4:  0.7%  0.2%  0.1%  0.0%  0.0%    skip:96.5%
  
  [libx264 @ 000002460bda4740] mb B  I16..4:  0.1%  0.2%  0.0%  B16..8:  1.3%  0.2%  0.0%  direct: 0.7%  skip:97.5%  L0:57.4% L1:40.7% BI: 1.9%
  
  [libx264 @ 000002460bda4740] 8x8 transform intra:79.7% inter:31.4%
  
  [libx264 @ 000002460bda4740] coded y,u,v intra: 5.7% 2.9% 3.7% inter: 0.1% 0.5% 0.2%
  
  [libx264 @ 000002460bda4740] i16 v,h,dc,p: 70% 23%  4%  2%
  
  [libx264 @ 000002460bda4740] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 45%  8% 45%  0%  0%  0%  0%  0%  0%
  
  [libx264 @ 000002460bda4740] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 26% 25%  3%  3%  4%  4%  3%  2%
  
  [libx264 @ 000002460bda4740] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 000002460bda4740] ref P L0: 72.6%  3.0% 16.6%  7.7%
  
  [libx264 @ 000002460bda4740] ref B L0: 75.7% 20.6%  3.7%
  
  [libx264 @ 000002460bda4740] ref B L1: 97.7%  2.3%
  
  [libx264 @ 000002460bda4740] kb/s:2271.59
  
  [aac @ 000002460bda8580] Qavg: 55135.730