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  • How can low frame rate video be made to look more smooth ?

    26 octobre 2017, par d3pd

    I am trying to clean up a video that was recorded in 2003 in low-light conditions on what was possibly a cameraphone. The video has been cleaned up somewhat (cropped, logos removed and stabilized), but it remains quite jerky, due in large part to its low frame rate. What are some tricks that might clean up the video in this regard ? I feel that I am asking for something a bit like tweening in flash animations, but for pixels, whereby additional frames are generated using nearby frames of the video. Does such a trick exist ? Is there another way to approach this problem ?

    To reproduce the video processing so far, take the following steps :

    # get video
    
wget http://www.anwarweb.net/saddamdown.wmv
    
# crop
    
ffmpeg -i saddamdown.wmv -filter:v "crop=292:221:14:10" -c:a copy saddamdown_crop.wmv
    
# remove logo 1
    
ffmpeg -i saddamdown_crop.wmv -vf delogo=x=17:y=77:w=8:h=54 -c:a copy saddamdown_crop_delogo_1.wmv
    
# remove logo 2
    
ffmpeg -i saddamdown_crop_delogo_1.wmv -vf delogo=x=190:y=174:w=54:h=8 -c:a copy saddamdown_crop_delogo_1_delogo_2.wmv
    
# stabilize
    
ffmpeg -i saddamdown_crop_delogo_1_delogo_2.wmv -vf deshake saddamdown_crop_delogo_1_delogo_2_deshake.wmv

    Note : The video is of the Saddam Hussein execution.

  • How can low frame rate video be made to look more smooth ?

    14 décembre 2016, par d3pd

    I am trying to clean up a video that was recorded in 2003 in low-light conditions on what was possibly a cameraphone. The video has been cleaned up somewhat (cropped, logos removed and stabilized), but it remains quite jerky, due in large part to its low frame rate. What are some tricks that might clean up the video in this regard ? I feel that I am asking for something a bit like tweening in flash animations, but for pixels, whereby additional frames are generated using nearby frames of the video. Does such a trick exist ? Is there another way to approach this problem ?

    To reproduce the video processing so far, take the following steps :

    # get video
    
wget http://www.anwarweb.net/saddamdown.wmv
    
# crop
    
ffmpeg -i saddamdown.wmv -filter:v "crop=292:221:14:10" -c:a copy saddamdown_crop.wmv
    
# remove logo 1
    
ffmpeg -i saddamdown_crop.wmv -vf delogo=x=17:y=77:w=8:h=54 -c:a copy saddamdown_crop_delogo_1.wmv
    
# remove logo 2
    
ffmpeg -i saddamdown_crop_delogo_1.wmv -vf delogo=x=190:y=174:w=54:h=8 -c:a copy saddamdown_crop_delogo_1_delogo_2.wmv
    
# stabilize
    
ffmpeg -i saddamdown_crop_delogo_1_delogo_2.wmv -vf deshake saddamdown_crop_delogo_1_delogo_2_deshake.wmv

    Note : The video is of the Saddam Hussein execution.

  • ffplay v3.4.1 : Could not initialize SDL - No available video device

    21 juin 2021, par iorih0304

    My linux distribution is Ubuntu 20.04 server, and ffplay is compiled from ffmpeg v3.4.1 source code.

    


    I use the command

    


    ffplay -f rawvideo -video_size 1920x1080 -i BasketballDrive_1920x1080_50.yuv


    


    or

    


    Display=:0 ffplay -f rawvideo -video_size 1920x1080 -i BasketballDrive_1920x1080_50.yuv


    


    But it displays failed, the message shows :

    


    ffplay version 3.4.1 Copyright (c) 2003-2017 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-17ubuntu1~20.04)
  configuration: --enable-shared --enable-nonfree --enable-ffplay
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100

Could not initialize SDL - No available video device
(Did you set the DISPLAY variable?)


    


    Follow some website's suggestions, I try to install apt-get install libx11-dev xorg-dev, compile and install SDL2-2.0.14 from source code and recompile ffmpeg and ffplay.
But the result is the same.

    


    How can I let it display successfully ?

    


    Thanks !

    


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