Recherche avancée

Sur d’autres sites (5401)

• file input from http (url) in melt plugin

  26 décembre 2017, par Anuj TBE

  I’m using MELT plugin for generating crossfade animation using series of images.

  I found the corssfade animation script from here.

  and the script is

  melt -verbose \
  
  -profile atsc_720p_25 \
  
  001.png out=50 \
  
  002.png out=75 -mix 25 -mixer luma \
  
  003.png out=75 -mix 25 -mixer luma \
  
  004.png out=75 -mix 25 -mixer luma \
  
  005.png out=75 -mix 25 -mixer luma \
  
  -consumer avformat:output.mp4 vcodec=libx264 an=1

  But instead of providing file from local path, I want to use http url like

  melt -verbose \
  
  -profile atsc_720p_25 \
  
  http://example.com/image1.jpg out=50 \
  
  http://example.com/image2.jpg out=75 -mix 25 -mixer luma \
  
  http://example.com/image3.jpg out=75 -mix 25 -mixer luma \
  
  http://example.com/image4.jpg out=75 -mix 25 -mixer luma \
  
  http://example.com/image5.jpg out=75 -mix 25 -mixer luma \
  
  -consumer avformat:output.mp4 vcodec=libx264 an=1

  But it gives

  No LADSPA plugins were found!
  
  
  
  Check your LADSPA_PATH environment variable.

  and full output is

  No LADSPA plugins were found!
  
  
  
  Check your LADSPA_PATH environment variable.
  
  [mjpeg @ 0x168a320] Changeing bps to 8
  
  [mjpeg @ 0x12725a0] Changeing bps to 8
  
  [mjpeg @ 0x1691120] Changeing bps to 8
  
  [mjpeg @ 0x1bc5ac0] Changeing bps to 8
  
  [mjpeg @ 0x1907ae0] Changeing bps to 8
  
  [mjpeg @ 0x1d09a20] Changeing bps to 8
  
  [mjpeg @ 0x13a2b00] Changeing bps to 8
  
  [mjpeg @ 0x1e4e6e0] Changeing bps to 8
  
  [mjpeg @ 0x1d0b8c0] Changeing bps to 8
  
  [mjpeg @ 0x1d190c0] Changeing bps to 8
  
  +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+
  
  |1=-10| |2= -5| |3= -2| |4= -1| |5=  0| |6=  1| |7=  2| |8=  5| |9= 10|
  
  +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+
  
  +---------------------------------------------------------------------+
  
  |               H = back 1 minute,  L = forward 1 minute              |
  
  |                 h = previous frame,  l = next frame                 |
  
  |           g = start of clip, j = next clip, k = previous clip       |
  
  |                0 = restart, q = quit, space = play                  |
  
  +---------------------------------------------------------------------+
  
  [libx264 @ 0x7f7f980c7aa0] using SAR=1/1
  
  [libx264 @ 0x7f7f980c7aa0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0x7f7f980c7aa0] profile High, level 3.1
  
  [libx264 @ 0x7f7f980c7aa0] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  [mjpeg @ 0x7f7f88433200] Changeing bps to 8
  
  [mjpeg @ 0x7f7f88832980] Changeing bps to 8
  
  [mjpeg @ 0x7f7f88052ac0] Changeing bps to 8
  
  [mjpeg @ 0x7f7f88c5abe0] Changeing bps to 8
  
  [mjpeg @ 0x7f7f88bdd560] Changeing bps to 8
  
  [mjpeg @ 0x7f7f88beb2a0] Changeing bps to 8
  
  [mjpeg @ 0x7f7f88c838a0] Changeing bps to 8
  
  [mjpeg @ 0x7f7f894a1100] Changeing bps to 8
  
  [mjpeg @ 0x7f7f88b6a3a0] Changeing bps to 8
  
  [mjpeg @ 0x7f7f88b78840] Changeing bps to 8
  
  [swscaler @ 0x7f7f88c5f740] YUV color matrix differs for YUV->YUV, using intermediate RGB to convert
  
  [swscaler @ 0x7f7f88c5f740] YUV color matrix differs for YUV->YUV, using intermediate RGB to convert
  
  [swscaler @ 0x7f7f898cc980] Warning: data is not aligned! This can lead to a speedloss
  
  [swscaler @ 0x7f7f88c5f740] YUV color matrix differs for YUV->YUV, using intermediate RGB to convert
  
  [swscaler @ 0x7f7f88c5f740] YUV color matrix differs for YUV->YUV, using intermediate RGB to convert
  
  [swscaler @ 0x7f7f88c5f740] YUV color matrix differs for YUV->YUV, using intermediate RGB to convert
  
  [mjpeg @ 0x7f7f89ff25a0] Changeing bps to 8
  
  Segmentation fault (core dumped)

  Also, the generated video file is broken

  How can I provide http input ?

• Senior Software Engineer for Enterprise Analytics Platform

  28 janvier 2016, par Matthieu Aubry — Uncategorized

  We’re looking for a lead developer to work on Piwik Enterprise Analytics core platform software. We have some exciting challenges to solve and need you !

  You’ll be working with both fellow employees and our open-source community. Piwik staff lives in New Zealand, Europe (Poland, Germany) and in the U.S. We do the vast majority of our collaboration online.

  We are a small, flexible team, so when you come aboard, you will play an integral part in engineering. As a leader you’ll help us to prioritise work and grow our community. You’ll help to create a welcoming environment for new contributors and set an example with your development practices and communications skills. You will be working closely with our CTO to build a future for Piwik.

  Key Responsibilities

  • Strong competency coding in PHP and JavaScript.
  • Scaling existing backend system to handle ever increasing amounts of traffic and new product requirements.
  • Outstanding communication and collaboration skills.
  • Drive development and documentation of internal and external APIs (Piwik is an open platform).
  • Help make our development practices better and reduce friction from idea to deployment.
  • Mentor junior engineers and set the stage for personal growth.

  Minimum qualifications

  • 5+ years of experience in product development, security, usable interface design.
  • 5+ years experience building successful production software systems.
  • Strong competency in PHP5 and JavaScript application development.
  • Skill at writing tests and reviewing code.
  • Strong analytical skills.

  Location

  • Remote work position !
  • or you can join us in our office based in Wellington, New Zealand or in Wrocław, Poland.

  Benefits

  • Competitive salary.
  • Remote work is possible.
  • Yearly meetup with the whole team abroad.
  • Be part of a successful open source company and community.
  • In our Wellington (NZ) and Wroclaw (PL) offices : snacks, coffee, nap room, Table football, Ping pong…
  • Regular events.
  • Great team of people.
  • Exciting projects.

  Learn more

  Learn more what it’s like to work on Piwik in our blog post

  About Piwik

  At Piwik we develop the leading open source web analytics platform, used by more than one million websites worldwide. Our vision is to help the world liberate their analytics data by building the best open alternative to Google Analytics.

  The Piwik platform collects, stores and processes a lot of information : hundreds of millions of data points each month. We create intuitive, simple and beautiful reports that delight our users.

  Apply online

  To apply for this position, please Apply online here. We look forward to receiving your applications !

• Probe function in ffmpeg

  14 octobre 2014, par eejs

  I am trying to write a demuxer for STL subtitle format(FFmpeg). I am having trouble understanding how the probe function is referenced in ffmpeg.
  I have the following code for my probe :

  #include "avformat.h"
  
  #include "internal.h"
  
  #include "subtitles.h"
  
  #include "libavutil/intreadwrite.h"
  
  
  
  typedef struct {
  
      FFDemuxSubtitlesQueue q;
  
  } STLContext;
  
  
  
  static int stl_probe(AVProbeData *p)
  
  {
  
      char c;
  
      const unsigned char *ptr = p->buf;
  
      av_log(0,100,"printing the probe function");
  
      while(*ptr=='\r' || *ptr=='\n' || *ptr=='$' || (ptr[0]=='/' && ptr[1]=='/'))
  
          ptr+=ff_subtitles_next_line(ptr);
  
      if (sscanf(ptr, "%*d:%*d:%*d:%*d , %*d:%*d:%*d:%*d , %c", &c) == 1)
  
          return AVPROBE_SCORE_MAX;
  
       return 0;
  
  
  
  }
  
  static int64_t get_pts(char **buf, int *duration)
  
  {
  
          int hh1, mm1, ss1, ms1;
  
          int hh2, mm2, ss2, ms2;
  
          int len=0;
  
          if (sscanf(*buf, "%2d:%2d:%2d:%2d , %2d:%2d:%2d:%2d , %n",
  
                     &hh1, &mm1, &ss1, &ms1,
  
                     &hh2, &mm2, &ss2, &ms2, &len) >= 8 && len>0) {
  
              int64_t start = (hh1*3600LL + mm1*60LL + ss1) * 100LL + ms1;
  
              int64_t end   = (hh2*3600LL + mm2*60LL + ss2) * 100LL + ms2;
  
              *duration = end - start;
  
              *buf+=len;
  
              return start;
  
           }
  
          return AV_NOPTS_VALUE;
  
  }
  
  
  
  static int stl_read_header(AVFormatContext *s)
  
  {
  
      STLContext *stl = s->priv_data;
  
      AVStream *st = avformat_new_stream(s, NULL);
  
  
  
      if (!st)
  
          return AVERROR(ENOMEM);
  
      avpriv_set_pts_info(st, 64, 1, 100);
  
      st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
  
      st->codec->codec_id   = AV_CODEC_ID_TEXT;
  
  
  
      while (!avio_feof(s->pb)) {
  
          char line[4096];
  
          char *p = line;
  
          const int64_t pos = avio_tell(s->pb);
  
          int len = ff_get_line(s->pb, line, sizeof(line));
  
          int64_t pts_start;
  
          int duration;
  
          if (!len)
  
              break;
  
  
  
          line[strcspn(line, "\r\n")] = 0;
  
  
  
          pts_start = get_pts(&p , &duration);
  
          if (pts_start != AV_NOPTS_VALUE) {
  
              AVPacket *sub;
  
  
  
              sub = ff_subtitles_queue_insert(&stl->q, p, strlen(p), 0);
  
              if (!sub)
  
                  return AVERROR(ENOMEM);
  
              sub->pos = pos;
  
              sub->pts = pts_start;
  
              sub->duration = duration;
  
          }
  
      }
  
  
  
      ff_subtitles_queue_finalize(&stl->q);
  
      return 0;
  
  
  
  }
  
  static int stl_read_packet(AVFormatContext *s, AVPacket *pkt)
  
  {
  
      STLContext *stl = s->priv_data;
  
      return ff_subtitles_queue_read_packet(&stl->q, pkt);
  
  }
  
  
  
  static int stl_read_seek(AVFormatContext *s, int stream_index,
  
                               int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
  
  {
  
      STLContext *stl = s->priv_data;
  
      return ff_subtitles_queue_seek(&stl->q, s, stream_index,
  
                                     min_ts, ts, max_ts, flags);
  
  }
  
  
  
  static int stl_read_close(AVFormatContext *s)
  
  {
  
      STLContext *stl = s->priv_data;
  
      ff_subtitles_queue_clean(&stl->q);
  
      return 0;
  
  }
  
  
  
  AVInputFormat ff_stl_demuxer = {
  
      .name           = "stl",
  
      .long_name      = NULL_IF_CONFIG_SMALL("STL subtitles"),
  
      .priv_data_size = sizeof(STLContext),
  
      .read_probe     = stl_probe,
  
      .read_header    = stl_read_header,
  
      .read_packet    = stl_read_packet,
  
      .read_seek2     = stl_read_seek,
  
      .read_close     = stl_read_close,
  
      .extensions     = "stl",
  
  };

  Output of ./ffmpeg -f stl -i Test.stl Test.srt

  ffmpeg version N-66838-g9071bab Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Oct 14 2014 12:28:54 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  
    configuration: 
  
    libavutil      54. 10.100 / 54. 10.100
  
    libavcodec     56.  4.101 / 56.  4.101
  
    libavformat    56.  9.100 / 56.  9.100
  
    libavdevice    56.  1.100 / 56.  1.100
  
    libavfilter     5.  1.105 /  5.  1.105
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
  Input #0, stl, from '/home/eejya/SubtitleTesting/UK_FINAL_240511.stl':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Subtitle: text
  
  Output #0, srt, to '/home/eejya/SubtitleTesting/UkTest.srt':
  
    Metadata:
  
      encoder         : Lavf56.9.100
  
      Stream #0:0: Subtitle: subrip (srt)
  
      Metadata:
  
        encoder         : Lavc56.4.101 srt
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (text (native) -> subrip (srt))
  
  Press [q] to stop, [?] for help
  
  size=      10kB time=00:27:10.06 bitrate=   0.0kbits/s    
  
  video:0kB audio:0kB subtitle:4kB other streams:0kB global headers:0kB muxing overhead: 121.594238%

  when I run the command

  ./ffmpeg -i Test.stl Test.srt 

  I don’t see any output printed by av_log and it says that the probe score is very less which may lead to mis-detection. That would mean only the extension is being checked.So, either my probe function is not being called or the buffer isn’t being read.
  How do I check whether my probe function is being called or not ?
  Also does the low score warning imply that the function is being called ?