this commit: commit e82883aa88bfccf2669e914eab9deef6cecfd0db Author: Matt Oliver <[email protected]> Date: Mon Oct 5 20:00:37 2015 +1100
modified how it uses dpi a bit may be related... On 12/16/15, Casey Price <[email protected]> wrote: > I'm running ffmpeg 2.8.1 (I think, I know its not the latest since I > grabbed it in October). > > I was able to resolve the issue by turning off screen-scaling in windows. > By default its set to 150% on the surface Pro 3. If I didn't set a > video_size the recording with screen scaling on it would only record a > small portion of the top left hand corner of the screen (1280x853), so I > believe the issue is with Dshow and screen scaling in windows 10 not > playing together nicely. > > This fix works for me, but it would be nice if capturing would work with > screen-scaling on since its quite hard to use the tablet with it off. > > On Tue, Dec 15, 2015 at 7:22 PM, Roger Pack <[email protected]> wrote: > >> What version of ffmpeg are you using here? You should not have to >> specify video_size by default it should capture the whole thing. >> >> On 12/14/15, Casey Price <[email protected]> wrote: >> > Hello, >> > >> > I'm currently trying to record the desktop of a surface pro 3 running >> > windows 10 using screen-capture-recorder and ffmpeg. The following >> > works >> in >> > the command line. >> > >> > ffmpeg -f dshow -video_size 1280x853 -i >> video=screen-capture-recorder >> > output.mpg >> > >> > However when I try to do the same in code I get the error >> > >> > '[dshow] Could not set video options' >> > >> > Which only happens when set the video_size option by doing the >> > following: >> > >> > >> > av_dict_set(&dictionary, "video_size", "1280x853", NULL); >> > >> > if ((ret = avformat_open_input(&ifmt_ctx, input_device, >> > inputFormat, >> > &dictionary)) < 0) { >> > printf("Cannot open input file\n"); >> > return ret; >> > } >> > >> > I've also noticed that screen-capture-recorder says it only supports up >> to >> > 1280x853 video size when doing -list_options, even though the >> > resolution >> of >> > the tablet in windows is 1920x1280, I think this is due to some >> > software >> > scaling that is going on with the surface, but not entirely certain >> because >> > the command line arguments that I posted above that works only records >> the >> > top left portion of the screen. >> > >> > Also, if I don't specify the video_size in the dictionary, the >> > recording >> > works but only records a portion of the desktop. >> > >> > Has anyone had an issue like this before? I'm not entirely certain if >> > the >> > issue lies with windows 10, directshow, screen-capture-recorder, or if >> I'm >> > just doing something wrong in my code. >> > >> > Thanks, >> > Casey >> > >> _______________________________________________ >> Libav-user mailing list >> [email protected] >> http://ffmpeg.org/mailman/listinfo/libav-user >> > _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
