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• tcp : Explicitly convert a pointer to a boolean integer

  9 septembre 2013, par Martin Storsjö

  tcp : Explicitly convert a pointer to a boolean integer
  This fixes warnings about making integers from pointers without
  
  a cast, and avoids the theoretical case where the lower 32 bits of
  
  the pointer would all be zero where the implicit cast wouldn’t give
  
  the right result.
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libavformat/tcp.c

• Revision c667593e1e : Merge changes from topic 'fix-vp9-bitstream-test' * changes : vp9_encoder_parm

  16 septembre 2015, par James Zern

  Changed Paths :
   Modify /vp10/encoder/encoder.c

  
   Modify /vp10/vp10_dx_iface.c

  
   Modify /vp9/encoder/vp9_encoder.c

  
  
  Merge changes from topic ’fix-vp9-bitstream-test’

  * changes :
  vp9_encoder_parms_get_to_decoder : cosmetics
  vp9...parms_get_to_decoder : remove unneeded func
  vp9...parms_get_to_decoder : fix EXPECT param order
  vp9_encoder_parms_get_to_decoder : delete dead code
  fix BitstreamParms test
  vp9_encoder_parms_get_to_decoder : remove vp10
  yuvconfig2image() : add explicit cast to avoid conv warning
  vp9/10 decoder_init : add missing alloc cast
  vp9/10 : set color_space on preview frame
  vp10 : add extern "C" to headers
  vp9 : add extern "C" to headers

• How to get native frame rate of vide with FFmpex ?

  18 juin 2021, par Flame_Phoenix

  Background

  


  I have an .mp4 video and I need to get the video's frame rate. Using ffmepg (in Linux) I know I can get this information via the following command :

  


  ffprobe -v 0 -of compact=p=0 -select_streams 0 -show_entries stream=r_frame_rate 'MyVideoFIle.mp4'


  


  Which returns :

  


  r_frame_rate=24000/1001


  


  FFmpex

  


  Doing this in bash is fine, but what I really want is to use it in my Elixir application. To this end I found out about ffmpex.

  


  First I tried using FFprobe :

  


  > FFprobe.format("Devil May Cry 5 Bury the Light LITTLE V COVER.mp4")

{:ok,
 %{
   "bit_rate" => "611784",
   "duration" => "482.999000",
   "filename" => "Devil May Cry 5 Bury the Light LITTLE V COVER.mp4",
   "format_long_name" => "QuickTime / MOV",
   "format_name" => "mov,mp4,m4a,3gp,3g2,mj2",
   "nb_programs" => 0,
   "nb_streams" => 2,
   "probe_score" => 100, 
   "size" => "36936415",
   "start_time" => "0.000000",
   "tags" => %{
     "compatible_brands" => "isomiso2avc1mp41",
     "encoder" => "Lavf58.19.102",
     "major_brand" => "isom",
     "minor_version" => "512"
   }
 }}


  


  Which gives me some information, but not the frame rate.

  


  My next tentative was to use the command options :

  


  command = 
  FFmpex.new_command() 
  |> add_input_file("Devil May Cry 5 Bury the Light LITTLE V COVER.mp4") 
  |> add_video_option(???) 


  


  But the problem here is that I can't find in the documentation the video option I need to get the native frame rate. I only found vframe which is used to set the video frame rate.

  


  Question

  


  

  • How can I get the native fps of a video using ffmpex ?