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• How to encode with ffmpeg PCM to AAC with different sample formats ?

  1er août 2014, par user2212461

  I’m using the following code to encode PCM to AAC using libav. It works with sample_fmt = AV_SAMPLE_FMT_S16 ; and a newer release of liabv. In older versions, only sample_fmt = AV_SAMPLE_FMT_FLT is allowed, but then the decoder always returns 0 (nothing decoded). What in the code do I need to adapt in order to make it work with sample_fmt = AV_SAMPLE_FMT_S16 ? Is sample_fmt the input or output format ?

   avcodec_register_all();
  
   codec = avcodec_find_encoder(CODEC_ID_AAC);
  
   c = avcodec_alloc_context3(codec);
  
  
  
   c->bit_rate   = 64000;
  
   c->sample_rate= 44100;
  
   c->channels   = 1;
  
   c->frame_size = 86000;
  
   c->sample_fmt = AV_SAMPLE_FMT_FLT;//---> this works with AV_SAMPLE_FMT_S16
  
  
  
  buf = (uint8_t *)malloc(bufSize);
  
  audioData = (uint8_t *)malloc(size);
  
  
  
  //fill audioData
  
  
  
  int packetSize = avcodec_encode_audio(c, buf, bufSize, 
  
           (short *)audioData);//------>returns 0 when using AV_SAMPLE_FMT_FLT

• avformat/unix : fix handling of EOF in case of SOCK_STREAM.

  20 mars 2018, par Bela Bodecs

  avformat/unix : fix handling of EOF in case of SOCK_STREAM.
  When recv() returns 0 in case of SOCK_STREAM type, it means EOF and with
  
  this patch returns value accordingly.
  Signed-off-by : Bela Bodecs <bodecsb@vivanet.hu>
  

  • [DH] libavformat/unix.c

• 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