better video rendering in d

[Ferhat Kurtulmuş]

On Tuesday, 21 March 2023 at 17:46:00 UTC, H. S. Teoh wrote:
> On Tue, Mar 21, 2023 at 05:29:22PM +0000, monkyyy via 
> Digitalmars-d-learn wrote:
>> On Tuesday, 21 March 2023 at 17:18:15 UTC, H. S. Teoh wrote:
>> > [...]
>> 
>> I vaguely remember an hour and half for 5 minutes of video 
>> when its extremely lightweight and raylib trivially does 
>> real-time to display it normally and realistically I wouldn't 
>> be surprised if it could do 1000 frames a second.
>> 
>> Coping several gb of data to disk(that probably asking the gpu 
>> one pixel at a time) to be compressed down into a dozen mb of 
>> video is just... temp shit.  I should just do something that 
>> isnt stressing hard drives extremely unnecessarily.
>
> You could try to feed the frames to ffmpeg over stdin instead 
> of storing the frames on disk. See this, for example:
>
> 	https://stackoverflow.com/questions/45899585/pipe-input-in-to-ffmpeg-stdin
>
> Then you can just feed live data to it in the background while 
> you generate frames in the foreground.
>
>
> T

This is how I use pipe process with d and ffmpeg. I am reading 
video frames but other way may work too.
https://github.com/aferust/oclcv/blob/main/examples/rgb2gray-video/source/app.d