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• Can anyone help in understanding AVFrame.linesize[] ?

  7 avril 2016, par theateist

  I tried to find what each cell of AVFrame.linesize[] means, but I didn’t found.

  As I understood linesize[0] is the width, linesize[1] is the height.

  1. If I’m right what does other cells mean ?
  2. why after avcodec_decode_video2(codecCtxDecode, frameDecoded, &frameFinished, &packet); only linesize[0] has the value and other cells are always 0 ?

  UPDATED

  I think AVFrame.data[i] and AVFrame.linesize[i] are the data of specific color in the row and the length of the row, am I correct ?

• lavf/davs2.c : rename as avs2dec.c for better understanding

  20 août 2020, par hwren

  lavf/davs2.c : rename as avs2dec.c for better understanding
  Signed-off-by : hwren <hwrenx@126.com>
  

  • [DH] libavformat/Makefile
  • [DH] libavformat/avs2dec.c
  • [DH] libavformat/davs2.c

• Seeking Ideas : How Can I Automatically Generate a TikTok Video from a Custom Song Using C# [closed]

  14 mai 2024, par Jamado

  Im creating a c# program which creates a video of the from a song and posts it on tiktok.

  


  Right now my program

  


  


  1. Uses spleeter to split the song into stems

     


  


  2. uses a script of GitHub to create waveform images of the stems

     


  


  


  I want my end video to look like this :

  


  https://vm.tiktok.com/ZMM7CDmUt/ - only one song will play per video

  


  https://vm.tiktok.com/ZMM7Xdw8b/

  


  https://vm.tiktok.com/ZMM7CcGtE/ - no webcam or that hitting animations

  


  basically I want the stems of the songs to be placed on top of a FL studio timeline, synced to the song, then I want to overlay a image on top of the video. and then to contribute for todays gen's 3 second attention span, add some audio virtualisations ontop of the fl studio recording (the music making app in the video) and a little shake to the image

  


  I've tinkered with ffmpeg before, and I reckon it could do the trick here. I'd use the waveform pictures and mix them with a pre-recorded FL Studio video using ffmpeg's filters, like VStack to stack images, Scroll to slide them around and Blend. And then tweak the overlay filter for that shake effect. Plus, I found out ffmpeg can whip up some basic audio visualizations, which is neat. (https://gist.github.com/Neurogami/aeed8693f7ac375d5e013b8432d04d3f)

  


  But my main issue with this approach is, how the waveform images will look weird/out of place ontop of the fl studio video, because FL studio has a really spesific "theme". I could manually create a template and then use some other library to merge the template image and the waveform image. But, it feels a bit janky and would probably be a hassle to set up and implement.

  


  So, I'm curious if you folks have any nifty libraries, GitHub gems, or ideas to help me nail this video ?