[FFmpeg-trac] #10504(ffmpeg:new): Unable to use dshow devices with gdigrab/ddagrab anymore

[FFmpeg]

#10504: Unable to use dshow devices with gdigrab/ddagrab anymore
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             Reporter:  Jaex    |                     Type:  defect
               Status:  new     |                 Priority:  important
            Component:  ffmpeg  |                  Version:  git-master
             Keywords:          |               Blocked By:
             Blocking:          |  Reproduced by developer:  0
Analyzed by developer:  0       |
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 Using dshow audio devices together with gdigrab or ddagrab gives
 "Conversion failed!" error after stop the recording. I was using gdigrab
 with dshow audio devices together for the past 10 years without problem,
 after upgrade FFmpeg to 6.0 this problem started. And it is necessary for
 me to upgrade FFmpeg to 6.0 because of ddagrab support. So I can't remain
 in old versions.

 Example arguments to reproduce the issue:

 {{{
 ffmpeg -f gdigrab -framerate 30 -offset_x 0 -offset_y 0 -video_size
 1920x1080 -draw_mouse 1 -i desktop -f dshow -i audio="virtual-audio-
 capturer" -c:v libx264 -r 30 -preset ultrafast -tune zerolatency -b:v
 3000k -c:a aac -ac 2 -b:a 128k -y "output.mp4"
 }}}

 These arguments works fine with FFmpeg 5.1 or older versions but fails
 with [https://github.com/BtbN/FFmpeg-Builds/releases/tag/latest FFmpeg
 master latest win64 (2023-08-05)].

 See attachments for FFmpeg 5.1 and FFmpeg master latest output logs.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10504>
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