Recherche avancée

Sur d’autres sites (9826)

• Screen recording for a specific area in Android application

  19 mars 2016, par Razor

  I need to record a video within a moving rectangular area on the image.

  Now I simply create bitmaps for each frame while moving the rectangle. Then I pick a video file from images using ffmpeg.

  This requires a lot of time and memory especially for temporary storage of frames (about 100MB for 5s video).

  Is there a quick and easy way for this purpose ?

• How do I record a specific application running on my Mac using ffmpeg ?

  3 janvier 2018, par Dave

  I just installed ffmpeg with using home-brew on Mac HighSierra. I want to record the contents (video only is fine) of an application running on my machine (as opposed to my entire Desktop). So I tried running the below

  davea$ ffmpeg -f gdigrab -framerate 25 -i title=DOSBox
  
  ffmpeg version 3.4.1 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4.1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
  
    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
  
    libavresample   3.  7.  0 /  3.  7.  0
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
    libpostproc    54.  7.100 / 54.  7.100
  
  Unknown input format: 'gdigrab'

  but as you can see, I’m getting this

  Unknown input format: 'gdigrab'

  error. What’s the right way to record video on my computer for only a specific application using ffmpeg ?

  Edit : Using hte suggestion in comments, I got this other error ...

  davea$ ffmpeg -f avfoundation -list_devices true -i ""
  
  ffmpeg version 3.4.1 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4.1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
  
    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
  
    libavresample   3.  7.  0 /  3.  7.  0
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
    libpostproc    54.  7.100 / 54.  7.100
  
  [AVFoundation input device @ 0x7fcbc160d0c0] AVFoundation video devices:
  
  [AVFoundation input device @ 0x7fcbc160d0c0] [0] FaceTime HD Camera
  
  [AVFoundation input device @ 0x7fcbc160d0c0] [1] Capture screen 0
  
  [AVFoundation input device @ 0x7fcbc160d0c0] AVFoundation audio devices:
  
  [AVFoundation input device @ 0x7fcbc160d0c0] [0] Built-in Microphone
  
  : Input/output error

• ffmpeg - How to filter video when record Window Application in the same time

  16 mai 2018, par user3181176

  I have a problem when record Window Application and filter (overlay, audio mixing...) with others filter video.

  This code work perfectly :

  ffmpeg -rtbufsize 1500M -f dshow -i audio="virtual-audio-capturer" -f gdigrab -framerate 30 -draw_mouse 0 -i title="Main" -vf crop=850:480:156:100 -pix_fmt yuv420p -profile:v baseline -y ok.mp4   (With Main is my Application)

  But this code bellow doesn’t :

  ffmpeg  -rtbufsize 1500M -f dshow -y -i audio="virtual-audio-capturer" -f gdigrab -framerate 30 -draw_mouse 0 -i title="Main" -vf crop=850:480:156:100 -pix_fmt yuv420p -profile:v baseline -stream_loop 999 -i "filter/filter.mp4" -filter_complex "[2:v]scale=385:216, setdar=dar=16/9[v1]; [2:v]scale=385:216, setdar=dar=16/9[v2]; [v1][v2]blend=shortest=1:all_opacity=1[v3]; movie=filter/nds_bg.mp4:loop=999,setpts=N/(FRAME_RATE*TB), scale=640:360[v4] ;[v4][v3]overlay=shortest=1:x=20:y=130;[2:a]aformat=sample_fmts=fltp:sample_rates=44100:channel_layouts=stereo,asetrate=8.5/10*44100,atempo=10/8.5,lowpass=f=2500,highpass=f=400,volume
  
  =3,bass=g=-30,equalizer=f=10.5:width_type=o:width=1:g=-30, equalizer=f=31.5:width_type=o:width=1:g=-
  
  30,equalizer=f=63:width_type=o:width=1:g=-10, equalizer=f=125:width_type=o:width=1:g=-20,equalizer=f=250:width_type=o:width=1:g=-1.5,equalizer=f=500:width_type=o:width=1:g=-20,equalizer=f=1000:width_type=o:width=1:g=-20,equalizer=f=8000:width_type=o:width=3:g=1,equalizer=f=16000:width_type=o:width=3:g=1" -vcodec libx264 -pix_fmt yuv420p -r 26 -g 30 -b:30 
  
  800k -shortest -acodec libmp3lame -b:a 128k -preset:v ultrafast -ar 44100 -f flv -bufsize 3000k -s 640x360 out.mp4

  I think this code need to output to video first

  ffmpeg -rtbufsize 1500M -f dshow -y -i audio="virtual-audio-capturer" -f gdigrab -framerate 30 -draw_mouse 0 -i title="Main" -vf crop=850:480:156:100 -pix_fmt yuv420p -profile:v baseline

  Please show me how to merge these code or any solution. Thank you so much !