vMix Forums
»
General
»
General Discussion
»
how to reducie the size of recorded video files
Rank: Advanced Member
Groups: Registered
Joined: 9/30/2020(UTC) Posts: 53 Location: Manchester Thanks: 10 times Was thanked: 3 time(s) in 3 post(s)
|
We stream our church services through vMix and simultaneously record them to mp4. The mp4 files end up over 6GB in size, which takes a considerable amount of time to then upload to youtube. To solve that, we run the files through a post processor that rerenders them to a smaller size, while keeping them at the original 1080p, 29.97 fps. Often this reduces the file size by up to 90%.
I'm wondering if there are settings in vMix we might use to reduce the size of the original video file it produces so that we don't have to take this 2nd step of rerendering using a different tool?
|
|
|
|
Rank: Advanced Member
Groups: Registered
Joined: 12/27/2012(UTC) Posts: 5,214 Location: Belgium Thanks: 290 times Was thanked: 952 time(s) in 787 post(s)
|
Originally Posted by: DThompson55 We stream our church services through vMix and simultaneously record them to mp4. The mp4 files end up over 6GB in size, which takes a considerable amount of time to then upload to youtube. To solve that, we run the files through a post processor that rerenders them to a smaller size, while keeping them at the original 1080p, 29.97 fps. Often this reduces the file size by up to 90%.
I'm wondering if there are settings in vMix we might use to reduce the size of the original video file it produces so that we don't have to take this 2nd step of rerendering using a different tool? A bit more info would be helpfull. How long does the service last do you use the recorder or the multicorder or.. What are your recorder settings (bitrate, profile,..)?
|
|
|
|
Rank: Advanced Member
Groups: Registered
Joined: 9/30/2020(UTC) Posts: 53 Location: Manchester Thanks: 10 times Was thanked: 3 time(s) in 3 post(s)
|
A service is normally one hour, give or take 10 minutes.
We're just using the normal Record feature.
MP4 Size - 1920x1080 Frame Rate - NTSC 29.97p Bit Rate - 16 MPS Profile H264Baseline, Hardware Encoder (checked), Fault Tolerant (unchecked) Audio - Master Audio Delay - 0 ms Audio Bit Rate - 128 kbps New File Every - None minutes
File output sizes vary from 6.3 to 8.9 GB.
Last Sunday's service came out at 6.6 GB. I run then ran it through a 3rd party tool (Reaper) that re-rendered it down to 765 MB.
I hope that's helpful information
|
|
|
|
Rank: Advanced Member
Groups: Registered
Joined: 12/27/2012(UTC) Posts: 5,214 Location: Belgium Thanks: 290 times Was thanked: 952 time(s) in 787 post(s)
|
|
1 user thanked doggy for this useful post.
|
|
|
Rank: Advanced Member
Groups: Registered
Joined: 9/30/2020(UTC) Posts: 53 Location: Manchester Thanks: 10 times Was thanked: 3 time(s) in 3 post(s)
|
The quality is reasonable at this size. Here's the approximate halfway point. video looks good. audio is fine.
|
|
|
|
Rank: Advanced Member
Groups: Registered
Joined: 9/30/2020(UTC) Posts: 53 Location: Manchester Thanks: 10 times Was thanked: 3 time(s) in 3 post(s)
|
Originally Posted by: doggy This is exactly the information I needed to understand. vMix is set to output at 16Mbps, whereas my postprocessor is set to outpu 2Mbps, which might explain the huge difference in size. We'll run some quality experiments at the lower bitrate. It might clear up our problem.
|
|
|
|
vMix Forums
»
General
»
General Discussion
»
how to reducie the size of recorded video files
Forum Jump
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.
Important Information:
The vMix Forums uses cookies. By continuing to browse this site, you are agreeing to our use of cookies.
More Details
Close