[FFmpeg-user] Blackmagic card issue capturing

[Christian Bianchini]

I was trying different examples where people were recording with the
blackmagic and that was one value, I could try without it and see if  it
works. I got 16 GB of ram on my PC and intel core i7.

On 1 March 2016 at 15:04, Moritz Barsnick <barsnick at gmx.net> wrote:

> Hi Christian,
>
> On Tue, Mar 01, 2016 at 14:40:17 +0000, Christian Bianchini wrote:
>
> I have no idea about dshow, but:
>
> > ffmpeg.exe -y -f dshow -video_size 1920x1080 -pixel_format uyvy422
> -rtbufsize 2100 -framerate 59.94 -i "video=Decklink Video Capture"
>
> Why do you specify "-rtbufsize 2100"? The default is 3041280, so what
> you chose is extremely small. Do you have absolutely no memory
> available?
>
> And so the input device handler complains:
>
> > [dshow @ 000000861104b5a0] real-time buffer [Decklink Video Capture]
> [video input] too full or near too full (197485% of size: 2100 [rtbufsize
> parameter])!
>
> I have no idea why it actually works after a few tries.
>
> Guessing,
> Moritz
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christian at bianchini.ch <christian at biachini.ch>
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