[FFmpeg-trac] #9505(undetermined:open): Unsupported frame rate with capture device after updating to MacOS Monterey

FFmpeg trac at avcodec.org
Thu Nov 11 20:43:13 EET 2021


#9505: Unsupported frame rate with capture device after updating to MacOS Monterey
-------------------------------------+-------------------------------------
             Reporter:  ewu100       |                    Owner:  Thilo
                                     |  Borgmann
                 Type:  defect       |                   Status:  open
             Priority:  critical     |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Comment (by ewu100):

 Replying to [comment:1 Thilo Borgmann]:
 > If there is no 30 fps mode listed under supported modes, there's nothing
 we can do about that - the OS has changed its mind of what to support (or
 the drivers, is there something involved from magewell?).
 > Testing the modes is not without a chance some modes just declare 60 fps
 but gives you 30 in the end.

 Hi Thilo,
 I appreciate your response to my ticket. To provide some additional
 information, I ended up writing a command line app in Swift to achieve
 what I'm trying to do (simply record a video from an external capture
 device via the command line) and found that using Apple's AVFoundation
 framework, I can record videos from the magewell capture device at 30fps.

 Given this new information, would that still point to a problem with the
 drivers and/or the OS? Not at all trying to challenge what you're saying,
 just want to provide some more context in case it indicates anything.

 Really appreciate the work you guys are doing here, and any help you or
 anyone else can provide here.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9505#comment:3>
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