looking to get in to speedrunning with the very interesting title, :The Longing:, going for a "400 days" ending, and after getting the numbers from the devs, it turns out it will take a minimum of 12 days to complete (hell of a speedrun i know), and i want to record the whole thing, but i dont know how big a 12 day long mp4 will be, even if i put it at 360p and terrible bitrate and frame rate. luckily, i have an empty 10 TB hard drive i got as a gift a while ago, but even then...

ive been trying to find ways to calculate how much i need to record, or what parameters, but google has been no help, and the game being rather small, its been taking a while for the mods to get back to me if i can take any liberties, so if anyone knows any tools, or is adept at this sort of thing it would be a massive help

Easiest way to figure it out would be to record gameplay of it for about an hour, and the multiply the size of that video by about 300.

To estimate the file size for your speedrun, you could start by recording an hour of gameplay at your intended settings of 360p with a low bitrate. Then, check the file size of this hour-long video and multiply it by 288, which is the total number of hours in 12 days. This calculation should give you a rough idea of the total storage needed.

You can get a good idea of how big your speedrun file will be by recording one hour of gaming at 360p with a low bitrate. Next, find out how big this film is; 12 hours is equal to 288, so multiply that by the file size of this hour-long video. An approximate estimate of the total storage required can be obtained from this computation.

I think 5 months is not a necro bump. Like I agree with the advice* but then I faced something I didn't expect. My 9 minute 30 second video in 1080p and MKV file format, which I like because the file is preserved if recording is cutoff unexpectedly, clocked in at 706 MB. After editing, including cropping 30 seconds out and adding text blocks that appear at certain times, I exported to MP4 for YouTube and it's 2.82 GB. My 40 minute video ended up over 8 GB after editing and took 2.5 hours for YouTube to upload.

So maybe record in MKV with OBS like I do. You record in MP4 and the power flickers, the video is gone. Or fumble like me and knock your USB-C capture card cable out. That said, 10 TB is crazy overkill for speedrunning. You shouldn't be concerned wielding that much power. My computer hard drive is 1/2 a TB and my SD card stack is another 1/2 TB. I debate a 1 or 2 TB external drive.

I know the stream happened by now but we didn't get a full answer.

Let's see, 9 minutes at 700 MB at 1080p for allegedly high quality, medium video size is 78 MB per minute. High school chemistry dimensional analysis says 12 days would take (60 minutes / 1 hour) x (24 hours / 1 day) x (12 days / 1 video) = 1,347,840 MB = 1.35 TB. I'm deliberately rounding up. Can check out my settings, which may or may not be optimal: