Recherche avancée

Sur d’autres sites (9761)

• Android built in Camera encoder VS FFMPEG --- Speed

  3 novembre 2015, par user3903275

  How does recording a 1080P, H264 encoded video in android camera application is realtime fast but encoding a video in android using FFMPEG is slow at the same video size ?

  I know FFMPEG is a software level encoder and it wont support any hardware features.

  I know camera applications directly get buffer data from camera driver.

  But actually where the difference happens ??

  Why camera application is Realtime fast ???

  Does it use GPU and OpenGL features of the phone to encode the video so that its so realtime fast ??

  Because both Camera Application and FFMPEG runs on same mobile but still camera encodes H264 realtime ???

• Added Google App Engine implementation (Python).

  18 novembre 2011, par Sebastian Tschan

  m .gitignore + application.js - example/application.js - example/index.html - example/style.css + gae/app.yaml + gae/main.py + gae/main.pyc + index.html m php/files/.htaccess + php/files/river.jpg + php/files/shrek_der_gestiefelte_kater.jpg + php/files/spellforce.jpg + php/files/valley.jpg m (...)

• FFmpeg Using Java Runtime to Make Video From PNG on Mac with Spaces in Directory Names

  4 février 2015, par Howard Roark

  I have run into a problem on Mac OSX where I’m trying to make video from PNG’s such as :

  String command = "ffmpeg -r 30 -i " + outputFileName + fileName + "_%d.png -i "+
  
      outputFileName + fileName + ".wav -r 30 -pix_fmt yuv420p " +
  
      outputFileName + videoName;
  
  
  
  Runtime rt = Runtime.getRuntime();
  
  Process proc = rt.exec(command);

  Unfortunately, I don’t have any control over these filenames and they come to me with spaces in them. On Windows, I simply surround the command with quotes and all works as expected. However, on Mac, I tried that and many other things to no avail. Once a space is encountered in the filename, FFmpeg reports that the file cannot be found and truncates the string up to the point of the first space. When I surround the filename with quotes, FFmpeg tells me it can’t find the file and shows me the quotes around the file. Such as :

  String command = "ffmpeg -r 30 -i \" + outputFileName...\"

  Assume the filename is :

  /Users/me/Application Folder/...

  FFmpeg will report : "/Users/me/Application : No such file or directory.

  Without the quotes, it will error with : /Users/me/Application : No such file or directory.

  I have tried every escape sequence I can think of. I’ve also tried putting the escape characters only in the file name where the spaces occur such as :

  outputFileName = outputFileName.replace(" ", "\" \"");

  In that instance, FFmpeg says : /Users/me/Application" : No such file or directory.

  Along with escaping with quotes, I tried :

  outputFileName = outputFileName.replace(" ", "\\");

  I also tried :

  outputFileName = outputFileName.replace(" ", "\\ ")

  In those cases, I get : /Users/me/Application : No such file or directory.

  [Edit : in the preview I see the backslash at the end of application but in the final post it’s not there... there’s a backslash you should see such as ’/.../Application\’]

  Can someone tell me how to get FFmpeg to run my command when the directory name has spaces in it ? I have no control over the directory names when they come to me. Java is able to find these directories just fine without any sort of escape characters in the directory name. What do I have to do to get FFmpeg to do the same ?

  Thanks for your help.