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• Record region of screen using FFMPEG ? [closed]

  13 février 2024, par pookie

  I am looking to record a defined area of the screen at as high FPS as possible. I then need to extract the milliseconds for each frame.

  



  I was looking at FFMPEG and found that it has (or had...) an option called x11grab, so I tried the following to record a region of the screen :

  



  ffmpeg -f x11grab -s 1678x1050 -i :0.0+7,53 -r 25


  



  It doesn't work : I get an error Unknown input format: 'x11grab'

  



  I tried with xcbgrab too, but I get the same error of Unknown input format...

  



  I have seen this SO post, but I am using Windows 10, and it did not help me.

  



  Google tells me that this argument is now deprecated. I cannot find an examples of how to record just a part of the screen.

  



  I want to take a partial screenshot because I need as high a FPS as possible and my assumption is that taking a partial capture will be faster than taking a full screen capture. Is that correct ? If not, of course I could take a full screen capture and the crop out region of interest... and if that is the case, does anyone know how to do that ?

  


• Unable to Record Video in Jenkins using ffmpeg in Windows System

  12 novembre 2018, par Deepak Kumar Susarla

  I am using ffmpeg to capture video while running protractor scripts. Below ffmpeg code is working fine, when I directly run in windows from command line and able to create the video.

  C:\Jenkins\workspace\test\node_modules\ffmpeg-binaries\bin\ffmpeg.exe -f gdigrab -framerate 30 -s 1024x768 -i desktop -g 1000 -q:v 18 C:\Jenkins\workspace\test\AutomationVideo\Automation-11-7-2018-17.6.23.mpg

  But when I run the same code through jenkins(installed in windows system), showing below error and video is not getting recorded. Please help me in resolving the issue.

  error is :[gdigrab @ 000002395689b400] Capturing whole desktop as 1024x768x32 at (0,0)

  error is :[gdigrab @ 000002395689b400] Failed to capture image (error 5)
  [gdigrab @ 000002395689b400] Could not find codec parameters for stream 0 (Video : bmp, none, 754987 kb/s) : unspecified size
  Consider increasing the value for the ’analyzeduration’ and ’probesize’ options

  Input #0, gdigrab, from ’desktop’ :
  Duration : N/A, bitrate : 754987 kb/s
  Stream #0:0 : Video : bmp, none, 754987 kb/s, 30 fps, 1000k tbr, 1000k tbn, 1000k tbc

  Output #0, mpeg, to ’C :\Jenkins\workspace\test\AutomationVideo\Automation-11-7-2018-17.6.23.mpg’ :

  Output file #0 does not contain any stream

  ============================================================
  FFMPEG Binary Version used :4.0.0
  Windows OS : Windows 10
  Jenkins Version : 2.138.2

• ffmpeg : "Referenced QT chapter track not found"

  29 avril 2019, par Ze'ev

  Using ffmpeg to replace audio in a QuickTime with audio from a WAV.

  Anyone know why I’m getting Referenced QT chapter track not found ?

  Command :

  $ ffmpeg \
-i "$video" -t 25 \
-i "$audio" -map 0:v -c:v copy -map 1:a -c:a pcm_s24le -ar 48000 \
-hide_banner "$output"

  Output :

  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7faf62010600] Referenced QT chapter track not found
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mov':
  
    Metadata:
  
      major_brand     : qt
  
      minor_version   : 537199360
  
      compatible_brands: qt
  
      creation_time   : 2018-11-06T09:27:43.000000Z
  
    Duration: 00:00:25.00, start: 0.000000, bitrate: 186987 kb/s
  
      Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le(bt709, progressive), 1920x1080, 185115 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 25 tbn, 25 tbc (default)
  
      Metadata:
  
        creation_time   : 2018-11-06T09:27:43.000000Z
  
        handler_name    : Apple Alias Data Handler
  
        encoder         : Apple ProRes 422 (HQ)
  
        timecode        : 00:00:00:00
  
      Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-11-06T09:27:43.000000Z
  
        handler_name    : Apple Alias Data Handler
  
        timecode        : 00:00:00:00
  
      Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-11-06T09:27:43.000000Z
  
        handler_name    : Apple Alias Data Handler
  
        timecode        : 00:00:00:00
  
  Guessed Channel Layout for Input Stream #1.0 : stereo
  
  Input #1, wav, from 'audio.wav':
  
    Metadata:
  
      encoded_by      : Pro Tools
  
      originator_reference: aaOpKJaTN7Nk
  
      date            : 2018-11-08
  
      creation_time   : 13:53:50
  
      time_reference  : 166698000
  
    Duration: 00:00:25.00, bitrate: 2128 kb/s
  
      Stream #1:0: Audio: pcm_s24le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s32 (24 bit), 2116 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #1:0 -> #0:1 (pcm_s24le (native) -> pcm_s24le (native))
  
  Press [q] to stop, [?] for help
  
  Output #0, mov, to 'test19.mov':
  
    Metadata:
  
      major_brand     : qt
  
      minor_version   : 537199360
  
      compatible_brands: qt
  
      encoder         : Lavf58.12.100
  
      Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le(bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 185115 kb/s, 0.04 fps, 25 tbr, 12800 tbn, 25 tbc (default)
  
      Metadata:
  
        creation_time   : 2018-11-06T09:27:43.000000Z
  
        handler_name    : Apple Alias Data Handler
  
        encoder         : Apple ProRes 422 (HQ)
  
        timecode        : 00:00:00:00
  
      Stream #0:1: Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s
  
      Metadata:
  
        encoder         : Lavc58.18.100 pcm_s24le
  
  frame=  625 fps=277 q=-1.0 Lsize=  566343kB time=00:00:24.96 bitrate=185876.0kbits/s speed=11.1x
  
  video:564928kB audio:1406kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.001496%

  Same error with -map 0:v:0