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• Trying to change extension of filename on an ffmpeg script

  22 janvier 2019, par prat67

  (first time posting a question here)

  So I’m looking to write a ffmmpeg script to automate encoding my files to VP9.
  The problem I’m having is when I try to strip the extension and add a new one.

  For example
  Demo.mp4

  Should change to
  Demo.webm

  I’m running this on a Ubuntu-16.04 (Server Non-GI Version)
  I’ve tried a few different ways to accomplish this (using google and other posts on StackOverflow) but I can’t seem to make it work

  This is the error I keep getting..

  line 31 : Demo.mp4+.vp9 : syntax error : invalid arithmetic operator (error token is ".mp4+.vp9")

  I’ve also commented (in the code below) where the syntax error is pointing to..

  #!/bin/bash
  
  
  
  # Welcome Message
  
  
  
  clear
  
  printf "====================================\n"
  
  printf "FFMPEG Encoder\n"
  
  printf "(Using HDR-4k Profile)\n"
  
  printf "====================================\n\n"
  
  printf " Loading Files in Current Directory...\n\n"
  
  sleep 3s
  
  
  
  
  
  # Variables
  
  
  
  i=1
  
  ext=".webm"
  
  vadd=4000000
  
  vsub=2000000
  
  
  
  
  
  # Iterate through files in current directory
  
  
  
  for j in *.{mp4,mkv};
  
  do
  
  echo "$i.$j"
  
  file[i]=$j
  
  i=$(( i + 1 ))
  
  done
  
  
  
  
  
  # Select File & Bitrate
  
  
  
  printf "Enter file number\n"
  
  read fselect
  
  printf "${file[$fselect]}: Selected for encoding\n\n"
  
  
  
  printf "Enter Average Bitrate (Eg: 8000000)\n\n"
  
  read bselect
  
  
  
  
  
  # ***THIS IS WHERE THE PROBLEM IS***
  
  # Prepare output file, strip trailing extension (eg .mkv) and add .webm
  
  
  
  ftemp1="${file[$fselect]}"
  
  ftemp2="${ftemp1::-4}"
  
  fout="$(($ftemp2+$ext))"
  
  printf "Output file will be: $fout"
  
  printf "Preparing to encode..."
  
  sleep 5s
  
  
  
  
  
  # Encode with User-Defined Parameters
  
  
  
  ffmpeg -y -report -i ${file[$fselect]} -b:v $bselect -speed 4 -pass 1 \
  
    -pix_fmt yuv420p10le \
  
    -color_primaries 9 -color_trc 16 -colorspace 9 -color_range 1 \
  
    -maxrate "$(($bselect+$vadd))" -minrate "$(($bselect-$vsub))" \
  
    -profile:v 2 -vcodec libvpx-vp9 -f webm /dev/null && \
  
  ffmpeg -y -report -i ${file[$fselect]} -b:v $bselect -pass 2 \
  
    -pix_fmt yuv420p10le \
  
    -color_primaries 9 -color_trc 16 -colorspace 9 -color_range 1 \
  
    -maxrate "$(($bselect+$vadd))" -minrate "$(($bselect-$vsub))" \
  
    -profile:v 2 -vcodec libvpx-vp9 \
  
  $fout

  I’m certain there is a much cleaner way to do this - but I’m not expecting help with that :P

  My suspicion is that I’m trying to add two different types of variables ? But I thought I defined them as strings..I could be wrong

  Please Help... lol

• ffmpeg change metadata inside video file

  26 novembre 2020, par virtualsets

  Hello I have problems to change timecode insdie metadata of a video file "mov"

  


  ruta=r"E:\Brutos-sin-eliminar\inma-ruben-22-2-2020\multicam\\"
nombre=r"A019_02230134_C186.mov"
comand="ffmpeg -i " + nombre + " -ss 0 -map 0 -acodec copy -vcodec copy -timecode 01:20:10:00 -metadata:s:2:0 timecode=01:20:10:00 -metadata:s:1:0 timecode=01:20:10:00 -metadata:s:0:2 -metadata:s:0:2  timecode=01:10:10:00"+ " convert_" + nombre

os.popen(comand)


  


  I need to put muy own timecode to the file but this command not works.

  


  The console give me

  


    mov @ 00000225287fdc00] You requested a copy of the original timecode track so timecode metadata are now ignored
Output #0, mov, to 'convert_A019_02230134_C186.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    com.blackmagic-design.camera.windowedSensor: 1
    com.apple.proapps.manufacturer: Blackmagic Design
    com.blackmagic-design.camera.uuid: 3cf1dd9e-e307-47ff-864e-5487fea3fa47
    com.blackmagic-design.camera.projectFPS: 25
    com.apple.proapps.shootingRate: 50
    com.blackmagic-design.camera.cameraType: Blackmagic Pocket Cinema Camera 4K
    com.blackmagic-design.camera.shutterAngle: 180°
    com.blackmagic-design.camera.shutterMode: Angle
    com.blackmagic-design.camera.iso: 3200
    com.blackmagic-design.camera.whiteBalanceKelvin: 3000
    com.blackmagic-design.camera.whiteBalanceTint: -44
    com.apple.proapps.customgamma: com.blackmagic-design.camera.filmlog
    com.blackmagic-design.camera.look.LUTName: Blackmagic Pocket 4K Film to Extended Video.cube
    com.blackmagic-design.camera.guides.aspectRatio: 2:1
    com.blackmagic-design.camera.guides.safeArea: 90
    com.blackmagic-design.camera.firmware: 6.6
    com.apple.proapps.clipID: A019_02230134_C186
    com.apple.proapps.reel: 19
    com.apple.proapps.scene: 1
    com.apple.proapps.shot: 99
    com.apple.proapps.isGood: 0
    com.blackmagic-design.camera.environment: interior
    com.blackmagic-design.camera.dayNight: day
    com.apple.proapps.cameraName: A
    com.blackmagic-design.camera.colorScience: Blackmagic Pocket Cinema Camera 4K, Color Science Gen 4
    com.blackmagic-design.camera.dateRecorded: 2020:02:23
    timecode        : 01:20:10:00
    encoder         : Lavf58.11.101
    Stream #0:0(eng): Video: prores (apcn / 0x6E637061), yuv422p10le(bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 122315 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 01:10:10:00
      handler_name    : ?Apple Alias Data Handler
      encoder         : Apple ProRes 422
      timecode        : 01:10:10:00
    Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s (default)
    Metadata:
      creation_time   : 2020-02-23T00:34:02.000000Z
      handler_name    : ?Apple Alias Data Handler
      timecode        : 01:20:10:00
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
    Metadata:
      creation_time   : 2020-02-23T00:34:02.000000Z
      handler_name    : ?Apple Alias Data Handler
      timecode        : 01:20:10:00
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
  Stream #0:2 -> #0:2 (copy)
Press [q] to stop, [?] for help
frame=  467 fps=0.0 q=-1.0 Lsize=  281452kB time=00:00:18.64 bitrate=123693.3kbits/s speed=71.1x    
video:278913kB audio:2531kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.002533%


  


  I dont understand why not modificate the mov file... when open the metadata it is oringinal.

  


  Reggards

  


• How do I add a dependency to my application ?

  30 juin 2017, par Aang

  I’m currently working on an application called SatStressGUI, a GUI application written in Python, which was passed down to me from previous interns who have worked on it. It relies on dependencies such as wxPython (which, as most of you probably know, must be installed on the user’s own computer before the application the user is trying to run runs properly if the application calls on the the wxPython library). In the gitHub, under contents->resources->lib->python2.5->sitepackages, you’ll see all the libraries which the application is dependent on (wxPython is under the name wx, for example) copied and pasted. If I am correct, the existence of these libraries in sitepackages makes it so that the user does not have to manually install libraries such as wxPython themselves : the user can simply run the GUI application by downloading the whole package under "clone or download" in the main page and run the satstressgui executable file located in contents->MacOS. I believe there is a file somewhere, perhaps boot.py (located in contents->resources) that says, "hey, before the user runs this executable file, download the libraries under contents->resources->lib->python2.5->sitepackages."

  All that being said, I want to add a new dependency to the program. I am trying to use FFMPEG, which is an external program that allows you to take a sequence of images and convert it to a video. In satstressgui.py, which is the main source code file for this application (located in contents->resources) I use the subprocess python module to call on the external program FFMPEG. Here is the code snippet :

  #FFMPEG is an external program that converts a sequence of images to a video. 
  
  subprocess.call(['/usr/local/bin/ffmpeg', '-framerate', \
  
                           framerate, '-f', 'image2','-pattern_type', \
  
                           'glob', '-i', self.directory + '/orbit_*.png', \
  
                           '-r', '10', '-s', '620x380', self.directory + 
  
                           ".avi"])

  At the moment, this works on my own computer because I have FFMPEG installed (in case it matters, I installed it using homebrew). How do I make it so that FFMPEG becomes a dependency in my program just like wxPython (i.e., I make it so that FFMPEG is "installed" on my user’s computer before they run the application) ? I’ve looked on FFMPEG’s website and it looks as if there is a gitHub for it, but other than that I’m quite lost.

  NOTE : I’ve also tried to use imageio (another Python library) to convert a sequence of images to a video in my application, but I’ve failed. I tried to copy and paste the files from imageio’s gitHub to contents->resources->lib->python2.5->sitepackages, but whenever I try to "import imageio" it fails. This might be because I am adding the dependency wrong or because imageio only works on Python 2.6 and above and my program is written in Python 2.5. If someone could give me an answer to any of these questions and help me import a module such as imageio or add an external program such as FFMPEG as a dependency in my application, that’d be very much appreciated ! I can’t link imageio’s main website because of some restrictions by Stack Overflow, but you should be able to find it by simply searching it up on google (the main website has a photo of an astronaut in it’s top banner). I would more prefer a solution using FFMPEG, however, seeing as I’ve already implemented it in my code.

  Thank you so much in advance for your help ! I’m quite new to computer science and programming so I apologize if a lot of the clarifications or questions I’m asking are rudimentary.

  Here is the link to the gitHub of my application : https://github.com/nhudoan/SatStressGUI

  Here is the link to FFMPEG’s main website : https://ffmpeg.org/download.html#repositories