Hi there. I’m trying to put together a video using #lang video. First time. So, I’m following <http://leifandersen.net/racket-video/Getting_Started.html|the guide on the web>. I’m replying here to this message by @spdegabrielle because it seems like a nice example to follow.

My first attempt at producing a video results in the wrong aspect ratio and no sound. I see Stephen is setting some dimensions using #:properties, but I don’t even know which dimensions are my original input videos. When I look at the file properties I see the dimensions as 1590x768, but setting those did not yield the correct aspect ratio — I see no difference from not specifying anything.

@leif, I saw a message on the mail list where you say private/examples.rkt would show examples and in the current version of the package I find the examples/ directory. None of them make me think that I should set dimensions for the clipped, rendered video. So I wonder what’s up with my experiment.

The mp4 output file I get from procedure render is considerably larger than the input file and I’m clipping it — that’s also unexpected.

I’d appreciate getting any pointers here. Thanks for any info.