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• lavc/packet : add API for an AVPacket-based AVContainerFifo

  11 décembre 2024, par Anton Khirnov

  lavc/packet : add API for an AVPacket-based AVContainerFifo
  

  • [DH] doc/APIchanges
  • [DH] libavcodec/packet.c
  • [DH] libavcodec/packet.h
  • [DH] libavcodec/version.h

• http live streaming based on a m3u file

  23 mars 2018, par 3agelx45

  I have an account on a platform of streaming (legal !). This platform provide me with a m3u file, the content looks like follow :

  #EXTM3U
  
  #EXTINF:-1 tvg-id="" tvg-name="|| something ||" tvg-logo="" group-title="",|| CAT1 ||
  
  http://someurl.domain:1234/video1.ts
  
  #EXTINF:-1 tvg-id="" tvg-name="video2" tvg-logo="" group-title="CAT1 part 1",VIDEO1
  
  http://someurl.domain:1234/video2.ts
  
  #EXTINF:-1 tvg-id="" tvg-name="video2" tvg-logo="" group-title="CAT1 part 1",VIDEO2
  
  .
  
  .
  
  .
  
  etc

  This file works fine using vlc from home. but when I travel I use Hotels hotspots and some do block the connection to someurl.domain:1234.

  is it possible to stream the m3u file using a light http server (stream the file from server side and reroute result to http). The idea is run a small iptv server from home on my raspberry which will allow me to bypass the "censorship" faced with some hotspots.

  Thanks !

• FFmpeg for marking time video based on a reference date

  29 décembre 2018, par Denio Mariz

  I am trying to mark a timestamp in a video using drawtext filter.
  FFmpeg easily marks timestamps based on localtime, gmtime or even PTS. However, I want to assign a reference time (start time) for the timestamp in order to represent the time the video was recorded (not encoded).

  Reading the documentation, I found that option basetime can be used for this purpose. However it seems that is not working or I am missing something.

  The command line I am using is :

  ffmpeg -y -i input.mp4 -filter_complex drawtext="fontfile=/tmp/UbuntuMono-B.ttf: fontsize=36: fontcolor=yellow: box=1: boxcolor=black@0.4: text='Wall Clock Time\: %{gmtime\:%Y-%m-%d %T}': basetime=1456007118" output.mp4

  By using basetime=1456007118, it was expected the start time was set to ’02/20/2016 20:25:18’ since 1456007118 is the UTC time for that time and date :

  date -d '02/20/2016 20:25:18' +"%s" # format MM/DD/AAAA hh:mm:ss
  
  1456007118

  However, no error is issued by FFmpeg and the video is marked with current GMT, ignoring basetime option.

  Any hint ?
  Thanks.

  Complete information about FFmpeg version and output is :

  ffmpeg -y -i /home/denio/Videos/Interstellar_2014_Trailer_4_5.1-1080p-HDTN.mp4 -filter_complex drawtext="fontfile=/tmp/UbuntuMono-B.ttf: fontsize=36: fontcolor=yellow: box=1: boxcolor=black@0.4: text='Wall Clock Time\: %{gmtime\:%Y-%m-%d %T}': basetime=1470226363" /tmp/x.mp4 
  
  ffmpeg version 3.1.1 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 5.3.1 (Ubuntu 5.3.1-14ubuntu2.1) 20160413
  
    configuration: --enable-libxavs --enable-bzlib --enable-libfaac --enable-libfreetype --enable-libfontconfig --enable-libmp3lame --enable-libschroedinger --enable-libspeex --enable-libvorbis --enable-libx264 --enable-libx265 --enable-libxvid --enable-zlib --enable-x11grab --enable-static --enable-pthreads --enable-gpl --enable-nonfree --enable-version3 --disable-ffserver --enable-libgsm --enable-librtmp --enable-libvpx --enable-libschroedinger --enable-libopencore-amrnb --enable-libopenjpeg
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 48.101 / 57. 48.101
  
    libavformat    57. 41.100 / 57. 41.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 47.100 /  6. 47.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  ...
  
  ...