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• Creating an FFMPEG rounded corners filter with anti-aliasing

  22 août 2022, par vstrom coder

  I am using an ffmpeg filter that rounds the corners of a video as described in the answer to this question which works as expected.

  


  Is it possible to add anti-aliasing so that the corners do not look pixelated ?
I was thinking about these probable solutions :

  


  

  1. Extend the mathematical function in a way that would create semi-luminant pixels at the edges.

  


  2. Instead of calculating the luminance of each pixel, round the corners using an image and then apply transparency using an "alphamerge" filter.

  


  


  Any other suggestions are welcome.

  


• Why do I use the header file/library + ffplay.c download from the official website of ffmpeg to make the player worse than the official ffplay ?

  15 juillet 2020, par fredirty2017
  


  1. I am use win10 system with a "http_url_mp4" in hand, the MIME of this file is :
video/mp4 ; codecs="mp4a.40.2,avc1.640020" ; profiles="isom,mp41,mp42".

     


  


  2. I downloaded the header files, libraries, dlls, source code from https://ffmpeg.zeranoe.com/builds/ ,then :

     


  


  3. Run offical "ffplay http_url_mp4", audio and video viewing is normal ;

     


  


  4. I used VS2017 (the project has no special settings) to compile and link the fftools/ffplay.c，fftools/cmdutil.c and the included header files(libavcodec/libavutil and so on), libraries(such as avcodec.lib, avdevicelib, etc.), dlls(avcodec-58.dll / avformat-58.dll...), then run "myffplay http_url_mp4", The playback is stuttering, debugging found av_read_frame relative The processing cost more time, the calling frequency will be lower.

     


  


  5. i found config.h only line '#define FFMPEG_CONFIGURATION "—enable-gpl"', but offical ffplay cmdline shows :
'—disable-static —enable-shared —enable-gpl —enable-version3 —enable-cuda —enable-cuvid —enable-d3d11va —enable-dxva2 —enable-libmfx —enable-nvenc —enable-avisynth —enable-bzlib —enable-fontconfig —enable-frei0r —enable-gnutls —enable-iconv —enable-libass —enable-libbluray —enable-libbs2b —enable-libcaca —enable-libfreetype —enable-libgme —enable-libgsm —enable-libilbc —enable-libmodplug —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenh264 —enable-libopenjpeg —enable-libopus —enable-librtmp —enable-libsnappy —enable-libsoxr —enable-libspeex —enable-libtheora —enable-libtwolame —enable-libvidstab —enable-libvo-amrwbenc —enable-libvorbis —enable-libvpx —enable-libwavpack —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxavs —enable-libxvid —enable-libzimg —enable-lzma —enable-zlib',

     


  


  6. Does the VS project need special settings or other codes ?

     


  


  


• Can ffmpeg drawtext filter read RTF file as video overlay ?

  24 septembre 2015, par Rimon Soliman

  i’m using ffmpeg with ffserver to read a video stream, add a text overlay and re-stream the video in mpjpeg format. The text overlay is stored in a file, reloaded every frame with the drawtext ffmpeg filter and all is working properly.

  Now I want to make more awesome the overlayed infos, I googled something like "ffmpeg drawtext rtf" and "ffmpeg drawtext html" but I dind’t found any solution...

  Is this possible ?
  Can I use any kind of Rich Text format file as an overlay in ffmpeg drawtext filter ?

  Thanks for reading (and maybe help me).
  R.