Thank you so much for your help, Moritz! On Thu, Jun 7, 2018 at 7:12 AM Moritz Barsnick <barsn...@gmx.net> wrote:
> On Wed, Jun 06, 2018 at 15:52:48 -0600, Robert Frazier wrote: > > > *ffmpeg -video_size 1280x720 -pixel_format uyvy422 -framerate 60 -vsync > > > drop -f dshow -rtbufsize 150M -i video="Decklink Video Capture (5)" -i > > > video="Decklink Video Capture" -i video="Decklink Video Capture (5)" -i > > > video="Decklink Video Capture" -an -filter_complex > "[0:v][1:v]hstack[t]; > > > [2:v][3:v]hstack[b]; [t][b]vstack" -c:v libx264 -preset ultrafast -f > mpegts > > > pipe: | ffplay pipe: -vf scale=1280:720 \ pause* > [...] > > > video=Decklink Video Capture: No such file or directory > > I don't use Decklink, but what you did is to provide the input options > "-pixel_format uyvy422 -framerate 60 -f dshow" only to the first input > "-i". The three others ffmpeg doesn't realize are DShow devices. You > need to provide your input option before *every* input. > This definitely was my problem. I've had syntax errors this whole time, how embarrassing! My program works now at least, albeit kind of slowly, with a lot of overused buffer errors, and some occasional hiccups loading all my videos. Any tips on cleaning up latency and buffers perchance? > > > So my optimistic concern is just that I'm using the wrong naming > > scheme; > > Wrong syntax, actually. > > > my only other idea is that I can't read two streams from the DeckLink > > card simultaneously (though I feel like I've read I can). > > I have no idea, but my guess is that it will work. > > > streams does not run with frame rate set to 60fps, I need to set it to > > 59.94fps to work, otherwise it is a black screen. > > That may be a Decklink limitation, or have to do with the actual input. > BTW. 59.94 is also wrong or at least inprecise, you should probably > write it as "60000/1001", as ffmpeg accepts rationals. > This part as it turns out, is probably just a fluke on my part. Yesterday that input would only take 59.94, but today I started with a different test video loaded, and it is happy to use 60. So I'll just have to be careful to check those before hand, but I will keep in mind the fractional form. > > Cheers, > Moritz > Many thanks! Robert > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
