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• fftools/ffplay : fix typo in frame_queue_destory

  5 juillet 2023, par QiTong Li

  fftools/ffplay : fix typo in frame_queue_destory
  Not sure if the function naming frame_queue_destory is intended because
  
  "destory" is not really a word. Changing it to "destroy" makes more sense.
  Signed-off-by : QiTong Li <liqitong@163.com>
  
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] fftools/ffplay.c

• Unknown Decoder in ffmpeg

  17 mars 2020, par user6782547

  I have a script, that is called from Plex after the recording of a movie. This script just crops the black borders of the movie.

  When I call it directly from the command line, it works flawlessly. But when Plex calls it, it says : "Unknown decoder", even if I call it with the key word "auto" for the decoder.

  There’s another problem, that might give a hint to solve my problem. It also says : "WARNING: library configuration mismatch". (Only when being called from Plex.) This is probably, because I compile ffmpeg from the Debian source package (so that I can add the whole CUDA functionality).
  I had a look at the dynamic linker path, but it is empty on the command line.

  What is so different, when this command is called from Plex, than when I call it manually from the command line ?

  Thanks for any help

• extracting single frame from MediaElemet or FFmpegInterop

  13 janvier 2016, par Jakub Wisniewski

  I am writing app (Windows Phone 8.1 Store App) that allows user to connect to IP Camera. I am using FFmpeg Interop library for ffmpeg which allows me to play eg. rtsp streams in media element. I need now a way to somehow extract a single frame from stream or from media element.

  I have tested other application wchih allows connecting to IP cameras - IP Centcom, and they have working snapshots only for mjpeg streams as far as I now (they were not working for rtsp). Becouse of that I belive that it is impossible or at very least very hard to export frame from media element.

  I have different question - if anyone has ever used FFmpeg Interop and would like to help/explain me how could I modify/extend FFmpegInteropMSS to add method called ’GetThumbnailForStream’ that would work similary to ’GetMediaStreamSource’ but would return single frame (bitmap or jpg) instead of MediaStreamSource ?

  Every help would be appreciated

  EDIT :

  I have found something ;

  in MediaSampleProvider in method WriteAVPacketToStream (line 123) there is line

  auto aBuffer = ref new Platform::Array(avPacket->data, avPacket->size);

  and I belive that this is the place that stores single frame data that is needed to convert into bitmap - now since I do not know c++ too much I have a question : how can I convert it into a form that I could return via public method ?

  When returning :

  Platform::Array^

  I get

  ’FFmpegInterop::MediaSampleProvider’ : a non-value type cannot have any public data members

  EDIT2 :

  Ok I am doing approprate projection to byte according to this microsoft information, now I need to check if this is correct data.