robMAT wrote:Work has not allowed me to read the thread thoroughly or try your suggestions.
I will let you know how it goes when I find some time off.
A few more thoughts on this:
Video: I think the cheapest solution that will give you good-looking video would be to get an Elgato Camlink 4K (I've tested this and it works well with the OG BMPCC), which turns the BMPCC into a webcam. You will need a micro-HDMI to regular HDMI cable, and as always be very careful when plugging into the micro HDMI jack on the BMPCC as it's fragile. If you have a cage with a cable clamp, use it.
You then have to decide whether you can live with using the camera's "video" dynamic range, which will give you a good-enough but not stellar image without any further tinkering required by you,. If you want to improve the image by applying a LUT, you can do that with the free OBS software. You would then need to enable OBS's virtual camera setting, and select the OBS virtual camera as your video source in Twitch.
Another option would be to get an ATEM Mini, which is a bit overkill and doesn't solve your LUT problem (unless I'm not reading the manual correctly you can't use it to apply a LUT to original BMPCC footage, only BMPCC 4K and 6K), but it does turn the BMPCC into a webcam and has its own audio inputs so you can plug in a microphone or two and not have to deal with all the stuff I'm about to describe below.
Audio: as noted in earlier responses to this thread you don't want to use the camera's built-in mics as they are awful. Plugging an external mic into the BMPCC isn't a good solution either as the camera's preamps are as bad as the mics. You have basically two options: 1) use an external microphone with a preamp into the BMPCC, or 2) use a USB audio interface directly into your computer to record audio separately. Here are a few thoughts on both options:
1. Using an external mic with preamp into the BMPCC: The advantage of this approach is that you can take both the video and audio from the Elgato Camlink stream and the video and audio will automatically be in sync.
There are a bunch of threads here on the forum about how to get better audio into the original BMPCC (these threads are hard to find now because most BMPCC threads are about the 4K or 6K models; look for threads from 2017 and earlier). Here are a few:
viewtopic.php?f=2&t=52993 and
viewtopic.php?f=2&t=16476. The Røde Videomic Pro seems to have worked work well for many people. In the field I've had success going from the line out on my Sound Devices MixPre 6 into the BMPCC as a line source, but the MixPre is expensive; there are cheaper solutions, including the Zoom recorders that Leon mentioned above.
2. Using a USB audio interface directly into your computer. This gives you the most control and allows you to totally bypass the BMPCC's crappy audio (mics, preamps, and analog-to-digital converters), but it runs the risk that your video and audio will be slightly out of sync. Some of the better audio interfaces and recorders have a delay function, where you can set and fine-tune a delay in the audio if the audio is showing up in the stream slightly ahead of the video, which is the most likely scenario if you do encounter any sync mismatch. It's less work for a computer to process audio than video, so it can process audio faster...this means that audio arriving from a separate source from your camera may end up ahead of the video in your livestream.
Resolve 18 Studio, Mac Pro 3.0 GHz 8-core, 32 gigs RAM, dual AMD D700 GPU.
Audio I/O: Sound Devices USBPre-2