Newest 'ffmpeg' Questions - Stack Overflow

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• Manually generate "empty" h264 p-frame

  26 avril 2017, par leavittx

  Let's call a p-frame frame empty if it doesn't change any pixels in the currently decoded video (i.e. no motion vectors, nothing).

  What I need is to be able to manually insert empty p-frame into the video stream on request (need to send frames to the streaming client with a constant framerate, however the frame source on the streaming server can supply frames with a different/lower one).

  So I need to be able to correctly form the byte sequence which represents the empty p-frame for the current resolution (I wonder which other parameters could be needed?)

  Ideally, I prefer to have an encoder-independent solution, since I use two different ones: nvenc via Nvidia Video SDK and x264 via FFmpeg.

  Where should I look to?

• convert using ffmpeg without exec

  26 avril 2017, par Ronan Dejhero

  I have Windows XP, Apache, PHP 5.3 and ffmpeg working fine. I need to convert flv to avi or vice versa without using the exec() command. Is this possible?

  Thank you.

  edit : i hope someone could edit the ffmpeg source and implement an exec function into the php extension so we could just add the parameters to a function (ex $fmpeg->exec('exec parameters here'); ) so the exec is executed directly from the extension ...

  and compile those file :p

• How to resize video using ffmpeg in php without exec

  26 avril 2017, par aspirisen

  Is it possible to resize video using ffmpeg-php or something another library, because the server throws the error "Warning: exec() has been disabled for security reasons in..."

• Add aac single audio to MPEG DASH mpd files

  26 avril 2017, par Adminy

  I am trying to add manually to the .mpd file the following code.

  But its not working, Does everything have to be segmented in .mpd files ? or can I have a single .acc file?

• Missing dll files in my app when using ffmpeg libs (dll)

  26 avril 2017, par Aviv Sharon

  I have built ffmpeg v3.2.4 shared libraries (dll) in windows 8.1, core i-7, using mingw-64 and msys2. The reason was to update my old libraries that were used in my project. The build was OK.

  Also, my application has successfully linked with those dll's. However, when I am running my app, I got a message program can't start because libiconv-2.dll is missing in your computer. I overcome this issue by adding --disable-iconv switch in configure before running make to build the ffmpeg libs from sources. Then I got the same message with zlib dll missing. Then added --disable-zlib switch. But then, I got libbz2-1.dll is missing when running the app. I don't know how to solve the last one, but, what am I missing here? Why didn't I need all these dll file in the old ffmpeg version (0.7.17) and now I do (latest ffmpeg (checked out tag n3.2.4)) ??

  Thanks for the answers, Aviv