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• Regarding h264_nvenc encoding performance in ffmpeg

  18 juin 2021, par TONY

  I use h264_nvenc in ffmpeg to transcode 1920*1080 60fps video to h264. My settings is like as below :

  


  m_h264Ctx->max_b_frames = 0;
m_h264Ctx->has_b_frames = false;
m_h264Ctx->gop_size = 2500;
m_h264Ctx->bit_rate = 1024*1024*5;
m_h264Ctx->rc_buffer_size = 1024*1024*80;
m_h264Ctx->rc_max_rate = 1024*1024*10;
av_dict_set(&param, "level", "auto", 0);
av_dict_set(&param, "profile", "baseline", 0);
av_dict_set(&param, "cbr", "0", 0);
av_dict_set(&param, "rc", "vbr", 0);
av_dict_set(&param, "preset", "llhp", 0);
av_dict_set(&param, "gpu", "0", 0);
av_dict_set(&param, "zerolatency", "1", 0);
av_dict_set(&param, "2pass", "0", 0);
av_dict_set(&param, "forced_idr", "1", 0);


  


  Although it can work, but it's too slow. one frame costs about 15ms.
But if I use ffmpeg :

  


  ffmpeg -y -vsync 0 -hwaccel cuda -hwaccel_output_format cuda -i input.mp4 -c:a copy -c:v h264_nvenc -b:v 5M output.mp4


  


  to transcode in same PC, one frame only costs 2.5ms

  


• ffmpeg performance with hundreds of cuts (atrim)

  25 mai 2021, par drakon

  I have audio files (think 2h) where I want to cut out a lot of pieces out of it (500+) and a ffmpeg command like this one :

  


  ['ffmpeg', '-i', 'pipe:', '-filter_complex', 
'[0]atrim=end=30.69:start=0.0[s0];
 [0]atrim=end=34.31:start=31.18[s1];
 [0]atrim=end=38.65:start=34.43[s2]; 
 (... hundreds more)
 [s37][s38][s39][s40][s41]concat=a=1:n=42:v=0[s42]', '-map', '[s42]']


  


  Stream mapping built with ffmpeg-python :

  


    Stream #0:0 (mp3float) -> atrim
  (... hundreds more)
  Stream #0:0 (mp3float) -> atrim
  concat -> Stream #0:0 (libmp3lame)


  


  Now this works as expected but it takes locally something like 10mins for the files I have and when I deploy it to some server in the cloud it takes something like an hour. It definitely depends on the machine obviously and I definitely scale there the speed but I'd also like to know if there's a way to speed up the processing with ffmpeg itself.

  


  Thanks for any pointers !

  


• Paid Advertising Performance – target the right customers and invest confidently

  21 avril 2020, par Joselyn Khor — Development, Marketing, Plugins
  You can now analyse the success of your Google Ads campaigns and accounts directly in your Matomo with ease. See what keywords and search queries are leading to clicks for your paid ads and bringing your business the highest ROI, right down to devices and networks – for more effective targeting.

  For many Matomo users, Google Ads is the lifeline for their business. If people are looking for products you sell, you’ll want them to find you first.

  Invest confidently in the right keywords and target the right customers for higher ROI

  You can accurately measure the success of your impressions, clicks, costs, CPC and CPAs and see how they directly relate to the goals you’ve created in your Matomo.

  -> Read the rest of the story on the Form Analytics Marketplace page.

  What does the new Paid Advertising Performance feature look like ?

  The PPC Advertising Performance plugin integrates seamlessly with Matomo’s Row Evolution feature to show you how the performance of your campaigns change over time. This way you can see if the changes you’ve made have a positive or negative effect on sales over time.

  

  The Visitor Profiles feature is also integrated within the plugin so you can get a detailed overview of everyone who clicks on your ads. This will tell you if they have visited your website in the past and to what extent, so you can identify and target more like-minded customers for more sales when setting up your next campaign.

  

  Where do I get the Paid Advertising Performance feature ?

  Paid Advertising Performance is available on the Matomo Marketplace :

  Get the Paid Advertising Performance feature here

  Learn more from the PaidAdvertisingPerformance user guide and FAQs.