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• Add multiple timecodes to single audio file (.mkv ?) resulting from concatenating several (timecode-based) audio files

  6 juin 2020, par user3497017

  I first converted two .WAV files into .MKV files inserting timecode for each of this file. Then I concatenated these two .MKV files as inputs (each .MKV including one timecode inside). However timecodes were not maintained in the final output.MKV. I tried :

  



   1. ffmpeg -f concat -i mylist.txt -c copy output.mkv  
 2. mkvmerge -o output.mkv 1.mkv + 2.mkv


  



  with mylist.txt containing :

  



  file '1.mkv'
file '2.mkv'


  



  But the final file output.mkv resulting from such a concatenation has lost timecodes in case 1. In case 2, there is only one time code that has been preserved (from input 2.mkv) at the end. According to mediaInfo command line. I was expecting 2 times codes issued from 1.mkv and from 2.mkv. But is it the right approach ? (Is it even do-able ?)

  



  To summarize, my goal is to insert multiple time codes along with / inside a single audio file (.WAV, or .MKV, or whatever). Here is a sreenshot that technically depicts my purpose enter image description here

  


• Kodi : playback several video files from the internet as single movie with single timeline

  30 mai 2018, par HarryFox

  I’m writing an add-on for Kodi in Python, for a site with movie collection, which can be able to playback online video from the site. But problem is that many of them splitted apart on pieces of different length. And its not mpeg dash nor m3u playlists, its just individual pieces of single movie or an episode.

  My target is able to play those splitted videos as single movie with single timeline and playback will no require download all pieces of a movie. It’s important because many of Movies\episodes provides with subtitle file, that why single timeline is important. Also general idea for plugin which I’m writing is comfort to use, so online playback is very important too.

  I did some research but it almost no result. On official Kodi forum advise to create Input Stream add-on like Input Stream Adaptive, but it was written on c++ and it’s unattainable for me (for now at least). There is no tools for python to create such kind of add-ons.

  Another idea is to create middle server which on fly will somehow (with ffmpeg) combine those pieces, but it seems that the process will too resource-intensive especially for TV-boxes.
  In this case also raise many question about which way is better, and i have no enough experience and knowledge to solve the problems by myself even with google.

  So i need an advice how can i solve the problem, just to know right direction.
  Thank you for your time.
  Sorry for my English.

• FFMPEG zoompan filter cut short my video and slowed it down [on hold]

  9 décembre 2018, par Ewan Sou

  I am using FFMPEG (version 4.0.2) to zoompan my video. My code is as below

  ffmpeg -y -i input.mp4 -loop 1 -i overlay.png -ss 0 -t 10 -filter_complex "[0:v]scale=iw+iw:ih+ih, zoompan=z='if(lte(pzoom,1.0),1.6,max(1.001,pzoom-0.004))':d=1:x='iw/2-(iw/zoom/2)':y='0':s=720x720, setsar=1 [v0];[1:v]crop=720:720,fade=t=in:st=0:d=1,fade=t=out:st=3:d=1[v1];[v0][v1] overlay [v]" -map "[v]" -f mp4 -preset ultrafast -y output.mp4

  Essentially, what this code should do is slowly pan out from the center of my video, with a logo (overlay.png) fading in and out.

  This input.mp4 is 10 seconds. With the above code, the final video duration is 10 seconds still. But its not the full footage, it is cut short and compensated with slow motion to make it 10 seconds still...

  I need the final video to not be cut off at all. It should be the full footage and no slow motion effect.

  Anyone has any ideas what I am doing wrong ?

  Input video is at : https://instantly.sg/photobooth/input.mp4

  Overlay is at : here

  Thanks in advance !