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• How to send an mpeg_ts stream verbatim over rtp

  30 mars 2018, par Bruce Adams

  I’m trying to write some software to capture and process data from an mpeg_ts stream.
  As part of this I need, for testing, to generate a test mpeg_ts streams for my software to capture

  One option for this is to save a real stream to disk.
  So with that in mind I have a source transport stream which is being unicast via rtp to my box via port 1234. I can view it in vlc using :

  vlc rtp://@:1234

  and I can move between channels via the "programme" menu.
  subtitles are available but no EPG
  kaffeine works as well but only shows the first channel

  I can save this stream using :

  ffmpeg -i rtp://172.16.13.81:1235 -map 0 -copy_unknown -c copy save_ffmpeg.ts

  note : that rtp ://@:1235 does not work you need your full IP address though udp ://@:1235 does work for udp streams - see https://ffmpeg.zeranoe.com/forum/viewtopic.php?t=2386

  However there is a problem. When I try to open the resulting file save_ffmpeg.ts in VLC
  instead of opening one channel at a time it opens a new window for each channel which indicates an issue.

  If on the other hand I save it using :

  cvlc rtp://@:1235 :demux=dump :demuxdump-file=save_vlc.ts

  the resulting ts file can be viewed as normal.
  What is the difference ?

  Looking at the output of mediainfo on save_ffmpeg.ts vs save_vlc.ts
  I can see that ffmpeg has stripped the streams labelled Menu #1 to Menu #5.

  >mediainfo save_ffmpeg.ts  | grep -E '^[A-Za-z]+ #'
  
  Video #1
  
  Video #2
  
  Video #3
  
  Video #4
  
  Video #5
  
  Audio #1
  
  Audio #2
  
  Audio #3
  
  Audio #4
  
  Audio #5
  
  Audio #6
  
  Audio #7
  
  >mediainfo save_vlc.ts  | grep -E '^[A-Za-z]+ #'
  
  Video #1
  
  Video #2
  
  Video #3
  
  Video #4
  
  Video #5
  
  Audio #1
  
  Audio #2
  
  Audio #3
  
  Audio #4
  
  Audio #5
  
  Audio #6
  
  Audio #7
  
  Menu #1
  
  Menu #2
  
  Menu #3
  
  Menu #4
  
  Menu #5

  I tried adding -map_metadata 0 but to no avail.

  Q1 What is wrong with the ffmpeg command ?
  How do I get it to also save the menu streams ?

  Now I can send the ts that has the menu with ffmpeg using :

  ffmpeg -re -i save_vlc.ts -c copy -f mpegts udp://127.0.0.1:9999

  to get one channel
  but again if I try to send everything :

  ffmpeg -re -i ./save_file.ts -map 0 -map_metadata 0 -copy_unknown -c copy -f rtp_mpegts rtp://127.0.0.1:9999

  then :

  vlc rtp://127.0.0.1:9999

  opens a window for each and every channel.

  Q2 How do I fix this ?

  Q3 What would the equivalent gstreamer commands be to send and recieve ts files ?

  The relevance of the final question is that one of the options being considered for implementing the MPEG_TS reader is gstreamer. Though, it probably warrants a question of its own.

• FFmpeg AutoGen - set encoding settings

  6 décembre 2018, par user4964351

  I’m using FFmpeg auto generated unsafe bindings to capture rtsp (h264) stream like so :

          AVFormatContext* input_context = ffmpeg.avformat_alloc_context();
  
  
  
          AVDictionary* opts = null;
  
          ffmpeg.av_dict_set(&opts, "rtsp_transport", "tcp", 0); // set tcp transport 
  
  
  
          // try connect to rtsp stream
  
          if (ffmpeg.avformat_open_input(&input_context, "rtsp://...", null, &opts) != 0)
  
          {
  
              return;
  
          }
  
  
  
          if (ffmpeg.avformat_find_stream_info(input_context, null) < 0)
  
          {
  
              return;
  
          }
  
  
  
          // search video stream
  
          int video_stream_index = 0;
  
          for (int i = 0; i < input_context->nb_streams; i++)
  
          {
  
              if (input_context->streams[i]->codec->codec_type == AVMediaType.AVMEDIA_TYPE_VIDEO)
  
                  video_stream_index = i;
  
          }
  
  
  
          AVPacket packet;
  
          ffmpeg.av_init_packet(&packet);
  
  
  
          // create output file
  
          AVOutputFormat* format = ffmpeg.av_guess_format("mp4", null, null);
  
          AVFormatContext* output_context = null;
  
          ffmpeg.avformat_alloc_output_context2(&output_context, format, null, null);
  
          output_context->oformat = format;
  
          ffmpeg.avio_open2(&output_context->pb, "test.mp4", ffmpeg.AVIO_FLAG_WRITE, null, null);
  
  
  
           // start playing input stream
  
          ffmpeg.av_read_play(input_context);
  
          AVStream* stream = null;
  
          double stream_base_time_double = 0;
  
  
  
          var cnt = 0;
  
  
  
          // start reading packets from stream and write them to file
  
          while (ffmpeg.av_read_frame(input_context, &packet) == 0 && cnt < 200)
  
          {
  
              if (packet.stream_index == video_stream_index)
  
              {
  
                  if (stream == null) // create stream in output file
  
                  {
  
                      stream = ffmpeg.avformat_new_stream(output_context, input_context->streams[video_stream_index]->codec->codec);
  
  
  
                      // copy params from input stream
  
                      ffmpeg.avcodec_parameters_from_context(stream->codecpar, input_context->streams[video_stream_index]->codec);
  
                      stream->sample_aspect_ratio = input_context->streams[video_stream_index]->codec->sample_aspect_ratio;
  
                      // ffmpeg.av_opt_set_int(stream->codec, "crf", 25, 0); // this does not work
  
                      ffmpeg.avformat_write_header(output_context, null);
  
                  }
  
                  packet.stream_index = stream->id;
  
                  ffmpeg.av_interleaved_write_frame(output_context, &packet);
  
                  cnt++;
  
              }
  
              ffmpeg.av_packet_unref(&packet);
  
              ffmpeg.av_init_packet(&packet);
  
          }
  
  
  
          ffmpeg.av_read_pause(input_context);
  
          ffmpeg.av_write_trailer(output_context);
  
          ffmpeg.avio_close(output_context->pb);
  
          ffmpeg.avformat_close_input(&input_context);
  
          ffmpeg.avformat_free_context(input_context);
  
          ffmpeg.avformat_free_context(output_context);

  This code is working creating small test.mp4 video file.

  Now, i want to reduce file size a bit. For that i want to use crf flag.

  I can do that from command line :

  ffmpeg -rtsp_transport tcp -i rtsp://184.72.239.149/vod/mp4:BigBuckBunny_175k.mov -crf 25 F:\garbage\test.mp4

  But i can’t make it work from code.
  So far i tried setting crf like so :

  ffmpeg.av_opt_set_int(stream->codec, "crf", 25, 0);

  and

  ffmpeg.av_opt_set_int(stream->codec->priv_data, "crf", 25, 0);

  But it does nothing.

  Question : How can i set the crf option from code ?

  I know that i’m missing something obviously, but i just can’t figure it myself.

  Any help would be appreciated.

• How to install a Matomo premium feature

  31 janvier 2018, par InnoCraft

  You may have noticed over the last few months that many fantastic new features have been launched on the Matomo Marketplace. As some of them are paid premium features, you may wonder if the process to install them is straightforward, if you can test them before, and whether there is any support behind it. No worries – we’ve got you covered ! This blog post will answer some questions you may have about getting your first premium plugin.

  So why are there some premium features ?

  Researching, building, documenting, testing and maintaining quality products take years of experience and months of hard work by the team behind the scenes. When you purchase a premium plugin, you get a fully working product and you directly help the Matomo core engineers to grow and fund the new Free Matomo versions and cool features.

  However, it is important for us to mention that Matomo will always be free, it is a Free software under GPLv3 license and it will always be the same.
  Want to know more about this ? Check out our FAQ about why there are premium features.

  Can I test a premium feature before a purchase ?

  Absolutely. There are two ways in order to do that :

  1. InnoCraft Matomo Cloud
  2. Matomo Marketplace

  1. InnoCraft Matomo Cloud

  The easiest way is to create a free trial account (one minute of your time) on our Matomo cloud service. You will then have the possibility to test all the premium features during a 30-day trial period. No credit card is required.

  

  Every premium feature can be trialled for free on the Matomo Cloud

  2. Matomo Marketplace

  The second way is to get the premium feature from the Matomo Marketplace. We have an easy and hassle-free 30-day money back guarantee period on each feature. This means that if you are not happy with a premium feature and you are within the 30-day period, then you will get a full refund for it. Guaranteed !

  How to purchase and install a premium feature ?

  Step 1 : Purchasing the feature

  In order to get a premium feature, just add it to the cart :

  

  Once done, go to your cart and complete the checkout process to confirm the order.

  When the order is confirmed, you immediately get your license key on the order confirmation page. You also receive the license key by email.

  Step 2 : Activating the feature in your Matomo

  Now that you have received the license key, it is time to activate the plugin in your Matomo :

  • Log in to your Matomo and go to “Administration => Marketplace
  • Copy / paste the license key into the license field at the top of the page and click “Activate”

  

  • The key will now be activated and you will see a couple of new buttons.

  

  • To install the premium feature(s) you just purchased in one click, simply click on “Install purchased plugins”. Alternatively, you can scroll down in the Marketplace to the premium feature you purchased and click on “Install”. You can also download the ZIP file on https://shop.matomo.org/my-account/downloads

  And that’s it. The installation of a premium feature is as easy as copy/pasting the license key and clicking a button. Because one license key is linked to all purchased premium features, you only need to enter the license key once. The next time you purchase a premium feature, you simply click on “Install” to have it up and running.

  Updating a premium feature

  Updates for premium features work just like regular plugin updates. When there is a new update available, you will see a notification in the Matomo UI and also receive an email (if enabled under “General Settings”). To upgrade the feature simply click on “Update” and you’re done.

  Which support is provided for each of those premium features ?

  Premium features represent most of our day to day activity, so you can be 100% sure that we will do our maximum in order to answer any of your questions regarding them. To be 100% transparent, we often receive answers from our customers telling us how impressed they are by the quality of the service we are offering.

  Have any questions ?

  We are happy to answer any questions you may have so feel free to get in touch with us.

  Thanks !

  The post How to install a Matomo premium feature appeared first on Analytics Platform - Matomo.