Exporting

I'm new to this and could use some help clearing up some questions.
I use a GoPro 8 camera set to 1920x1080 it will be a bitrate of 45142 kbps, mp4 format.

I found this on the internet: Size for 1 hour of video.

720p 1280 x 720 800 – 900MB
1080p 1920 x 1080 1.2 – 1.4GB
2K 2048 x 1080 2.8 – 3GB
4K 3840 x 2160 20 – 22GB

I have a 35:58 min film exported in mp4 format, 1920x1080.
I exported 93297 in bitrate and that give me a 25,2Gb file.
I try to export 24225 in bitrate and that give me a 6,5Gb file.
But if I lower it more, the quality becomes so bad that it can't be used.
What is the correct setting to be able to get down to 1.4Gb file for an hour film?
Is it really possible?

I use DaVinchi Resolve 18

[Peter Chamberlain]

I presume you are referring to using Resolve?

Try to export in a mezzanine codec and compress in HandBrake.

Yes Sorry! I use DaVinchi Resolve 18

Sir!
I use the free version of Resolve 18. I can't find mezzanine codec, I'm not good at this.

Is that same as DNxHD ? I will try that.. Resolve crashed...

Mezzanine codec is the expression for a bunch of codecs, like DNxHR, Cineform (which I like under Windows) or ProRes (great for Mac). They are all available in the free version.
DNxHD is an older version. While it should work, I'd rather try DNxHR.

These Codecs have different levels of quality. For your purposes, DNxHR HQX 10-bit is plenty enough, or GoPro Cineform YUV 10-bit. If both of these crash your computer, there's a deeper problem. And don't save to the system disk, these exports can be very large.

What is the correct setting to be able to get down to 1.4Gb file for an hour film? Is it really possible?

And look good?

I'm skeptical.

Even standard definition DVD had larger files.

It depends on the encoder. German TV is regularly offering their own productions in the "Mediathek".
1.5 hours movies in HD are distributed regularly at a tad over 2 GB, and they look pretty damn good.

"MP4 format" -- that doesn't actually describe the codec being used.

Those numbers with H265 sound about right but if you're using the free version of Resolve you're probably using H264 which doesn't perform nearly as well.

Well, actually German TV is using H.264 for compatibility (MP4 wrapper).
Interestingly, analysing those clips with MediaInfo, they are using x264. Probably for a reason, they are quality fanatics with their own stuff.
There's a very popular series called "Tatort" (crime scene), recently done with quite good production value. It often has critically high detail (like drone shots) and dark exteriors, which are not always noise free. I like to watch these with my wife on a projector (good fun trying to guess the criminal) and it's rare that I notice any artefacts.
Since they normally shoot Arri in ProRes, I stick to my suggestion to export in a mezzanine codec and encode with HandBrake (VFR for sure).

I now went down a little deeper. My GoPro use 1080p, 60 framerate and H.264 + EVC.
Thanks guys for your replies. Maybe I can finally get a smaller file with good quality.
What happens when you don't have Raw input but compressed and then add another compression to it? Can interference occur? If I change e.g. bitrate and don't do it in multiples of input, can it cause problems?

This summer, the MC club took a trip into Norway and the "Trollstigen". I took about 280Gb of film(about 8 hours) I also have material from the phone and Nikon 830 camera . Now I'm trying to cut down to 1.5 hours so I can show it to the club. I want to put on a DVD.

Recompression of already highly compressed sources will reduce the quality for sure, but that's unavoidable with amateur equipment.
Are you serious about DVD? That's from the last millennium. SD only and MPEG2.

Well dvd... No, but if I can get room with it on a BluRay!! I'm hoping I can get the 1.5 hour size down to under 25Gb. Else I put it on a WD-Elements, I have one with 1Tb, it is easy to take with you. But if anyone wants a copy!!! Then I need some medium to put it on. If I compress ½ hour to about 7Gb then it will work,and it's not too bad then. But I want as good quality as possible.

All what you need today is fairly decent TV and then you just create mp4 on USB. No extra players needed as TVs have quite good playback capabilities. Test before though
25GB for 90min for HD should still be very decent.

I have been and bought 128GB USB memory. I will try again but before it has not worked on my TV. May have been in the wrong format. It was too choppy to be able to watch it.

I just tried it and it worked fine with what I got from Resolve. But... I reformatted the usb memory to NTFS, I copied a 6.9Gb file to it. the first 2.xx Gb worked then the TV stopped playing. This means that there will be many files... Does anyone know a good menu program so I can make a menu to put on the stick that android can read. So you can have a "play all".
If I pot it on ma NAS and run it from there then it work..

A little about the quality... backgrounds flicker a little when the light changes a little, the Asphalt on the road gets foggy surfaces. We have a 55" TV.

I've forgotten about that limit for TVs- but this is rather 4gig not 2 (if 2 then this is rather old TV).

1.5 hours movies in HD are distributed regularly at a tad over 2 GB, and they look pretty damn good.

I suppose "good" is a subjective thing.

I'm exporting out HD material using CQ 22, Very Slow.

A 12 minute program came out to 1.2 GB using H.265.

I would probably have to actually examine a 2 GB, 90 minute H.264 file before I could call it "good" myself.

2GB for 90min is around 3Mbit- this is Netflix level, so watchable if done well, but not really eg. Blu-ray level.

Of course not. I just wanted to point out that watchable video at 1.4 GB per hour is possible. Of course, the quality of the source footage matters too. In the case of Netflix or German TV it’s normally high-end equipment with low compression I-frame codecs or even RAW.
With highly compressed sources, I’d suggest to go higher. A Blu-ray can hold an hour with far higher data rates. Just note that some TVs may start to stutter when playing too high rates directly from storage, while a Blu-ray player will play anything within official limits.

I have a TV: Sony KD-55XE8577, I think they came out in 2017, so of course it's a few years old.
But now you will hear! If you insert the USB memory into the TV, you get a file manager and if I start the VCL app from there with my movie, it stops at 2.xx Gb. But if I launch VCL itself and from there select the movie, then it can play the whole movie 6,5Gb. And if I use my WD Elements I can see a 25Gb movie from it.. But that drive is a bit slow so the movie stops every now and then to "breathe". But no flickring in the background... The image quality is high. I assume that there is no way to get below 6.5Gb for half an hour and that you are not ashamed of the quality.