[FFmpeg-user] Decklink Capture

Dave Rice dave at dericed.com
Fri Mar 13 01:01:04 CET 2015

> On Mar 12, 2015, at 7:30 PM, Reuben Martin <reuben.m at gmail.com> wrote:
> On Wednesday, March 11, 2015 06:43:11 PM you wrote:
>> On Wednesday, March 11, 2015 07:19:14 PM Dave Rice wrote:
>>>> I’ve used bmdtools and piped it to ffmpeg for quite a while, and they
>>>> work
>>>> fine. I’m just curious about trying to access it directly.
>>> Same here, though I still use bmdtools. I'm curious how you compare the
>>> two.
>> I’m hoping less overhead due to the elimination of all the memory copy going
>> on with the pipe. I won’t be able to test till tomorrow.
> It did minor testing today and didn’t notice anything abnormal aside from 
> ffplay complaining quite verbosely about buffer overruns when opening directly 
> with ffplay.

Try -re before the input.

> Otherwise, there is a small reduction in overhead, and the video 
> is smoother when reducing the output framerate to half that of the input. (60 
> to 30 in my case)

What OS are you using?
Dave Rice

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