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• DirectX D3D11 Hardware Scaling Filter [closed]

  30 décembre 2024, par Dash Santosh

  I'm trying to implement a Hardware scaling filter (vf_scale_d3d11) using the VideoProcessBlt D3D11 DDI, and also add PIX_FMT_D3D11 support for the MediaFoundation Encoder (mfenc).

  


  Initially, there were a lot of "Static surface pool size exceeded".

  


  decode_receive_frame_internal failed = Invalid data found when processing input
Static surface pool size exceeded
get_buffer() failed
thread_get_buffer() failed
decode_slice_headec error
no frame!


  


  This got fixed by incrementing initial_pool_size by 3. Now the following two flows works as expected :

  


  

  1. ./ffmpeg.exe -hwaccel d3d11va -hwaccel_output_format d3d11 -hide_banner -i bbb_sunflower_2160p_30fps_normal.mp4 -hw_encoding 1 -c:v h264_mf -vframes 100 -loglevel verbose sample.mp4 -y

  


  2. ./ffmpeg.exe -hwaccel d3d11va -hwaccel_output_format d3d11 -hide_banner -i bbb_sunflower_2160p_30fps_normal.mp4 -hw_encoding 1 -c:v h264_mf -vf "scale_d3d11=width=1920:height=1080" -vframes 100 -loglevel verbose sample.mp4 -y

  


  


  When I try to call av_hwframe_transfer_data() within the if(encoder_requires_software_frame) block for the following flow, "Static surface pool size exceeded" occurs once again.

  


  

  3. ./ffmpeg.exe -hwaccel d3d11va -hwaccel_output_format d3d11 -hide_banner -i bbb_sunflower_2160p_30fps_normal.mp4 -c:v rawvideo -vframes 10 -loglevel verbose sample.yuv -y

  


  


  Increasing the initial_pool_size to any higher value doesn't seem to resolve this issue. The same error can be observed when the changes are integrated in HandBrake application, even for use cases (1) and (2). Any insights on why this would occur and how to fix this would be appreciated. Link to patch : https://ffmpeg.org/pipermail/ffmpeg-devel/attachments/20241230/ce28c8db/attachment.obj

  


• How can I trim mp3 file ? [duplicate]

  6 mars 2016, par devzone

  Possible Duplicate :
  Crop MP3 to first 30 seconds

  I’m using this class http://www.phpclasses.org/package/5275-PHP-Manipulate-MP3-audio-files.html but I get an error, I want to create a website that sell a music online I would like to have a preview like about 15-20 seconds how to this ? Any help ?
  Thank you.

• Cloaked Archive Wiki

  16 mai 2011, par Multimedia Mike — General

  Google’s Chrome browser has made me phenomenally lazy. I don’t even attempt to type proper, complete URLs into the address bar anymore. I just type something vaguely related to the address and let the search engine take over. I saw something weird when I used this method to visit Archive Team’s site :

  
  
  

  There’s greater detail when you elect to view more results from the site :

  
  
  

  As the administrator of a MediaWiki installation like the one that archiveteam.org runs on, I was a little worried that they might have a spam problem. However, clicking through to any of those out-of-place pages does not indicate anything related to pharmaceuticals. Viewing source also reveals nothing amiss.

  I quickly deduced that this is a textbook example of website cloaking. This is when a website reports different content to a search engine than it reports to normal web browsers (humans, presumably). General pseudocode :

  PLAIN TEXT

  C :

  1. if (web_request.user_agent_string == CRAWLER_USER_AGENT)
  2.  return cloaked_data ;
  3. else
  4.  return real_data ;

  You can verify this for yourself using the wget command line utility :

  <br />
$ wget --quiet --user-agent="<strong>Mozilla/5.0</strong>" \<br />
 http://www.archiveteam.org/index.php?title=Geocities -O - | grep \&lt;title\&gt;<br />
&lt;title&gt;GeoCities - Archiveteam&lt;/title&gt;

  $ wget —quiet —user-agent="Googlebot/2.1"
  http://www.archiveteam.org/index.php?title=Geocities -O - | grep \<title\>
  <title>Cheap xanax | Online Drug Store, Big Discounts</title>
  

  I guess the little web prank worked because the phaux-pharma stuff got indexed. It makes we wonder if there’s a MediaWiki plugin that does this automatically.

  For extra fun, here’s a site called the CloakingDetector which purports to be able to detect whether a page employs cloaking. This is just one humble observer’s opinion, but I don’t think the site works too well :