Challenge recording 1 hour, tomorrow

Eva

hello,

I need to record 1 hour in HD quality, a live show in isadora, but it seems it consumes a lot of space. Can somone help me how to do that? Can I maybe place it somehow on my ssd drive that has usb ( not usb c)?

All ghe best Eva

eamon

@eva

Hi Eva

Without knowing much more and in the interim of awaiting better minds to come along, would it make sense to pipe your isadora feed into OBS or similar?

Maybe by making the recording there it might lessen the size and strain on your computer? You can achieve this via syphon or NDI?

It would probably be better to record direct to your internal drive versus an external one too.

Without a greater picture of your machine specs and patch, that is what I would try first. I have never recorded directly in Isadora.

If you wish to have the audio too, you need a piece of software called, BlackHole. This will help route the audio internally to OBS etc. I believe you still need this app or similar to route audio for recording.

My 2cents

Hope this helps.

Eamon

Eva

hi Eamo,

Thank you! I am on a mac studio M1. Today I tried to record directly in Isadora with 55gb space left. After about 25 minutes I got a message that there was not enough space to proceed. So I am a bit surprised and try to find solutions.

It is only ghe visual I need.

All the best

Eva

eamon

@eva

It sounds like you have a lot of items on your HD. 1hr of HD video is about 10GB and your buffer is probably getting overloaded etc.

If you can free up some space, you might have more chance of getting a record but nonetheless, try the OBS/wirecast route and hopefully it will record a better copy without stressing your remaining space.

eamon

DusX

With 55gb left, you might get a warning that you are low on space if your drive is a Terabyte, since this would put you below 5% drive space pretty quickly.

Assuming you are using the MP4 / H264 Record Stage Setup - Codec:

🎥 Typical 1080p H.264 Bitrates

Quality Level	Bitrate (Mbps)	Approx File Size (1 hour)
Low (YouTube compressed / conferencing)	5 Mbps	~2.2 GB
Standard consumer camera	8 Mbps	~3.6 GB
High quality DSLR / mirrorless	12 Mbps	~5.4 GB
Very high quality	20 Mbps	~9 GB
Visually lossless / mezzanine	40 Mbps	~18 GB

The Data Rate can be set in the Record Stage Setup dialog, via the 'Max Data Rate' selector.
You really shouldn't need to use anything higher than 12 Mbps.

Here are some specs on recording transfer sppeds:

🎥 Typical 1080p 30fps H.264 Bitrates

Quality Level	Bitrate (Mbps)	Required Write Speed
Low (streaming)	5 Mbps	~0.6 MB/s
Standard	8 Mbps	~1 MB/s
High quality	12 Mbps	~1.5 MB/s
DSLR quality	20 Mbps	~2.5 MB/s
Very high	40 Mbps	~5 MB/s

Your external USB drive (assuming SSD) is likely fast enough for the job.
I use Black Magic Designs Disk Speed Test to verify my drive speeds for such things.
It is included in the FREE Black Magic Desktop Video software: Blackmagic Design Downloads