Recherche avancée

Sur d’autres sites (3009)

• How to make HLS start from the begining

  15 juillet 2016, par Ariel Argañaraz

  I need some help with HLS streaming, I’m trying to create a playlist for streaming,

  I’m using ffmpeg to generate the files and the .m3u8 files. And for playing i’m using a web page with videojs player

  The idea is to simulate a live streaming using files already created.

  The problem is that in some version of iphone works and in another does not work.
  The problem is that when I start play the video in the Safari browser of my phone it freezes for a while and then download and play the last segment.

  for example if the video is split in 4 differents .ts files.
  It starts playing from the 4th .ts file and then stop.

  The problem is that I have 2 iphone mobile phone, one of them works perfectly but the other one not

  The not working cell phone is a iphone 6 (version 9.2.1)

  Here is my m3u8 file. Note that I’m using the #EXT-X-PLAYLIST-TYPE:EVENT and I remove the #EXT-X-ENDLIST from the botton. So it should be played as an live streaming.

  It works for another phones, it begins from the 0 second when I set the #EXT-X-START:TIME-OFFSET=0

  but in this version (9.2.1) the video freezes and then jumps to the last segment (webinar-3.ts) plays that segment and finally stop.

  #EXTM3U
  
  #EXT-X-VERSION:4
  
  #EXT-X-MEDIA-SEQUENCE:0
  
  #EXT-X-ALLOW-CACHE:NO
  
  #EXT-X-PLAYLIST-TYPE:EVENT
  
  #EXT-X-START:TIME-OFFSET=0
  
  #EXT-X-TARGETDURATION:6
  
  #EXTINF:5.046444,
  
  webinar-0.ts
  
  #EXTINF:5,
  
  webinar-1.ts
  
  #EXTINF:5,
  
  webinar-2.ts
  
  #EXTINF:5,
  
  webinar-3.ts

  Have anybody got an idea of what i’m doing wrong or how to get a m3u8 config that works for this iphone version ?

• How do I convert a sequence of images into a movie that the filename does not start from 1 ?

  27 août 2011, par Vique

  I have a sequence of images to be converted into a movie. The only problem is that, I wanted to start converting image number 120 until 240 into a movie using ffmpeg but I don't know the command line for that. Is there any possible command line for this kind of case ?

• The start timestamp is non zero-when remuxing using libavformat

  14 janvier, par animaonline

  I'm remuxing a live rtmp stream using libavformat's sample remuxing.c my code is almost identical to that sample, but it also decodes the audio and video in order to render a preview using SDL, that works great.

  



  My application has a a button to start recording, and whenever the user presses it, the main loop will remux to a file, in a typical situation a user will wait a couple of seconds before initiating a recording, that is where the problems arise, the resulting video has non-zero start time. (I don't see these problems if I manually initiate the recording right after opening the input stream)

  



  e.g.
The user waits 5 seconds before starting a recording, then records for 5 seconds : The reported duration is 5s, while the start timestamp is at 9s. VLC fails to display the duration/position properly, but it works fine in other players.

  



  Here's an example of my main loop

  



  while (1) {
    ret = av_read_frame(ifmt_ctx, &pkt);

    //decode and preview
    //set pts, dts and duration
    //...

    if(ost->record){
        //remux
        ret = av_interleaved_write_frame(ofmt_ctx, &pkt);
        if (ret < 0) {
            fprintf(stderr, "Error muxing packet\n");
            break;
        }
    }

    av_packet_unref(&pkt);
}


  



  I have tried setting mux_ts_offset of the input stream, but it didn't help.