[FFmpeg-trac] #11542(ffmpeg:new): gdigrab sometimes fails to capture specific windows on some machines

[FFmpeg]

#11542: gdigrab sometimes fails to capture specific windows on some machines
-------------------------------------+-------------------------------------
             Reporter:  malaawar     |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:  ffmpeg
              Version:  git-master   |               Resolution:
             Keywords:  gdigrab      |               Blocked By:
  Windows                            |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by malaawar):

 Replying to [comment:8 MasterQuestionable]:
 > ͏    Log content of interest:
 > [[
 > Opening an input file: title=RecordingTest
 [C:\Users\rache\Downloads\RecordingTest.blend] - Blender 4.2.
 > [gdigrab] Found window RecordingTest
 [C:\Users\rache\Downloads\RecordingTest.blend] - Blender 4.2, capturing
 1920x1102x32 at (0,0)
 > [gdigrab] Probe buffer size limit of 5000000 bytes reached
 > [gdigrab] Stream !#0: not enough frames to estimate rate; consider
 increasing probesize
 > Input !#0, gdigrab, from 'title=RecordingTest
 [C:\Users\rache\Downloads\RecordingTest.blend] - Blender 4.2':
 > ͏  Duration: N/A, start: 1744083649.965406, bitrate: 2029190 kb/s
 > ͏  Stream !#0:0, 1, 1/1000000: Video: bmp, bgra, 1920x1102, 2029190
 kb/s, 29.97 fps, 1000k tbr, 1000k tbn
 > ]]
 > ͏    Probably the "title" failed to match? (try "hwnd"?)
 > ͏    https://ffmpeg.org/ffmpeg-devices.html#gdigrab
 > ͏    https://ffmpeg.org/ffmpeg.html#Video-Options
 > ͏    .
 > ͏    And "-framerate" is not properly applied. (misused as output
 option)
 >
 > ͏    Interpreted command:
 > ͏    `ffmpeg -f gdigrab -i "title=RecordingTest
 [C:\Users\rache\Downloads\RecordingTest.blend] - Blender 4.2" -framerate
 30 -c:v libx264 -preset ultrafast -b:v 500k -s 1280x720 -pix_fmt yuv420p
 "out0.mkv"`
 >
 > ͏    Likely not permissions issue.
 > ͏    But the recording target matching.
 > ͏    (either somehow multiple "title" matched; or the matched "title"
 changed meanwhile)
 >
 > ͏    Is recording "desktop" always working normally?


 Recording "desktop" does work normally. And you're right the title does
 change so i tested out "hwnd" and fixed the -framerate to be -r, while it
 did not record the full screen, this time it just ended up recording a
 still frame of the application. I could see the mouse cursor moving around
 the still frame but nothing else was changing.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11542#comment:10>
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