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• Convert m3u8 File URL to a GIF File [closed]

  30 juin 2023, par nxsi

  I have a m3u8 File URL that I got using the MusicKit API (Apple Music) which is an animated cover art for an album. (A quick side question on that. Is m3u8 the only format that Apple Music returns for animated cover arts ?)

  


  So, Now that I have that m3u8 file URL, I want to convert it to a GIF for the ease of use of GIFs.
I've tried using ffmpeg but I don't really seem to make it work at all with NodeJS.

  


  Here is a sample File URL of what Apple Music returns (https://mvod.itunes.apple.com/itunes-assets/HLSMusic116/v4/cb/ac/9e/cbac9e42-0c8a-9798-0016-52ce447cdc78/P359486356_default.m3u8)

  


  TLDR ;
1- Is m3u8 the only format of animated cover arts that the MusicKit api returns ?
2- Can I convert that m3u8 file URL to a GIF, If so, How ?
3- Are there any other ways than ffmpeg to use in NodeJS ?

  


  I've tried using ffmpeg and the furthest I got was a GIF that was corrupted and not done correctly.
Here is the command I tried :

  


  ffmpeg -i "https://mvod.itunes.apple.com/itunes-assets/HLSMusic116/v4/cb/ac/9e/cbac9e42-0c8a-9798-0016-52ce447cdc78/P359486356_default.m3u8" -vf "fps=10,scale=320:-1:flags=lanczos" output.gif


  


• AWS Chime : Video Merging Java Library

  18 mai 2023, par Swapnil Srivastav

  I am using AWS Chime to record interaction of two or more than two participants, I want to process this and build a final video.

  


  While making final video I want to mask one participant's video with some generic image and everything I want to do using Java.

  


  Is there any library available which can help me to do this ? I'm using Python as of today, ffmpeg library.

  


• lavc/vc1dsp : R-V V vc1_unescape_buffer

  12 mai 2024, par Rémi Denis-Courmont

  lavc/vc1dsp : R-V V vc1_unescape_buffer
  Notes :
  
   The loop is biased toward no unescaped bytes as that should be most common.
  
   The input byte array is slid rather than the (8 times smaller) bit-mask,
  
    as RISC-V V does not provide a bit-mask (or bit-wise) slide instruction.
  
   There are two comparisons with 0 per iteration, for the same reason.
  
   In case of match, bytes are copied until the first match, and the loop is
  
    restarted after the escape byte. Vector compression (vcompress.vm) could
  
    discard all escape bytes but that is slower if escape bytes are rare.
  Further optimisations should be possible, e.g. :
  
   processing 2 bytes fewer per iteration to get rid of a 2 slides,
  
   taking a short cut if the input vector contains less than 2 zeroes.
  
  But this is a good starting point :
  T-Head C908 :
  
  vc1dsp.vc1_unescape_buffer_c :      12749.5
  
  vc1dsp.vc1_unescape_buffer_rvv_i32 : 6009.0
  SpacemiT X60 :
  
  vc1dsp.vc1_unescape_buffer_c :      11038.0
  
  vc1dsp.vc1_unescape_buffer_rvv_i32 : 2061.0
  

  • [DH] libavcodec/riscv/vc1dsp_init.c
  • [DH] libavcodec/riscv/vc1dsp_rvv.S