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• Revision b295092b8f : Full range motion search for regular block sizes Add a full range motion search

  6 décembre 2013, par Jingning Han

  Changed Paths :
   Modify /vp9/common/vp9_rtcd_defs.sh

  
   Modify /vp9/encoder/vp9_mcomp.c

  
   Modify /vp9/encoder/vp9_onyx_if.c

  
  
  Full range motion search for regular block sizes

  Add a full range motion search for regular block sizes. This runs
  exhaustive search within the given reference area. This commit further
  optimizes the search process by combining 4 points test into one
  pipeline, which gives 30% speed-up as compared to run each individual
  point at a time.

  This full range search serves as a best possible motion search reference.
  When replacing the diamond search with full range search, the speed 0
  runtime of bus CIF at 2000 kbps goes from 153872ms to 623051ms. The
  compression performance compared to speed 0 setting gains 0.585% for
  derf set.

  Change-Id : Ieef1225216b0b86b4ac4872fa7fb9e18bf2eabb3

• ffmpeg with drawtext filenames of diffrent files within a -i concat filelist.txt

  10 juillet 2016, par halanson

  with the following script i am able to concatenate multiple video files within a textfile to a single video.

  now i want to have the individual names of each source video file displayed in the output video.

  here is a example of my source videoList.txt file with filename and filepath

  # videoList.txt
  
  file 'C:\video_0020.mp4' 
  
  file 'C:\video_0040.mp4' 
  
  file '..'

  and the windows batch file :

  @ECHO off
  
  SETLOCAL
  
  
  
  SET ffmpeg=C:\ffmpeg\bin
  
  SET inFile=-f concat -i C:\videoList.txt
  
  SET outFile=C:\output.mov
  
  
  
  SET codec=-r 24 -vcodec mjpeg -q:v 6
  
  REM videoFilter/filterComplex
  
  SET filterComplex=drawtext=fontfile='C\:\\Windows\\Fonts\\arial.ttf': text='%%{filenameOfEachVideo}'
  
  
  
  REM bring it all together
  
  SET commandline=%ffmpeg%\ffmpeg.exe %inFile% -filter_complex "%filterComplex%" %codec% %outFile%
  
  
  
  REM execute command
  
  %commandline%

• Streaming MJPEG video over RTSP without re-encoding using ffmpeg in Ubuntu

  5 août 2023, par user8109

  I have a video file encoded in MJPEG format stored as .avi file. I want to stream this video without re-encoding using ffmpeg tool from an Ubuntu machine to a remote server over RTSP protocol. I could achieve this for videos encoded in H.264 format and H.265 format using the below command.

  


  ffmpeg -re -i "$input_file" -c copy -f rtsp "$output_url"


  


  But, I am getting errors when I am streaming MJPEG video. One alternative approach could be to extract individual JPEG frames and stream that over the network using the following command.

  


  ffmpeg -re -i "$input_file" -f image2pipe -vcodec mjpeg -pix_fmt yuvj420p - | ffmpeg -i - -c:v copy -an -f rtsp "$output_url"


  


  But I am getting errors here also. Any solution is fine for me.