Hi everybody!
These are questions on a rather fundamental level:
Am I right in saying that a 10bit file should be 4 times bigger than an 8bit file (ignoring compression, length etc.)?
Or should I compare 3x8bit=24bit  vs  3x10bit+30bit  >> only 25% larger?


- The Mavic2Pro saves with 100Mbps in H.265 (which is roughly equivalent to what 200Mbps would be in H.264).
- The Mavic1Pro saves with 60Mbps and 8bit.


So... The bitrate, and therefore the files, only became less than 2 times larger (or more than 3 times if we reason in H.264 equivalent), yet 10bit files shoud be 4 times bigger than 8bit files (or should they only be 25% larger)?

Can anybody clarify that? I am confused. Thanks!

(Unfortunately, I don't have the M2P at work to create some files).

The Pro will do h264 and h265.

If you use h264 you have 8 bits per channel and 100mbps (at 4k/30).
If you use h265 and D-Log or HLG you have 10 bits per channel at 100mbps (4k/30).

HEVC has a far better compression ratio but is a lot more processor intensive.

Thanks, I do know all that, but it's not the question

Ok, in the meantime I used a video filesize calculator (https://www.digitalrebellion.com/webapps/videocalc) and confirmed that a (3x) 10bit file is indeed only 25% bigger than an (3x) 8 bit videofile.
That answers most of the question, but unfortunately, I can not delete the thread.

Moderator? Wanna get rid of it?

ygrabo Posted at 2018-9-3 07:55
Ok, in the meantime I used a video filesize calculator (https://www.digitalrebellion.com/webapps/videocalc) and confirmed that a (3x) 10bit file is indeed only 25% bigger than an (3x) 8 bit videofile.
That answers most of the question, but unfortunately, I can not delete the thread.

Why delete it? Others might have the same question and you found the answer, so it's useful. For me it was interesting to know.

Wachtberger Posted at 2018-9-3 08:00
Why delete it? Others might have the same question and you found the answer, so it's useful. For me it was interesting to know.

True... Ideally I would like to change the post etc. Oh well...

ygrabo Posted at 2018-9-3 08:02
True... Ideally I would like to change the post etc. Oh well...

As soon as you get to user level 2 (which will be soon depending on the number of your posts) you will become able to edit them.

FACTS (talking 4K here):

- The Mavic 1 Pro can record with H.264 compression only (60Mbit per second).
- The Mavic 2 Pro can record with H.264 or H.265 compression (100Mbit per second).
- 60Mbit per second equate to 7,5MB per second.
- 100Mbit per second equate to 12,5MB per second.
- The H.265 compression is up to 2x more efficient (more image data in the same amount of storage space), meaning that with the same bit rate, you get higher quality, compared to H.264.
- Therefore, to compare it with the Mavic 1 Pro, one could say that the Mavic 2 Pro records with 200Mbit per second, which is about 3x more.
- The Mavic 2 Pro can record in 10bit files, which are only 25% larger than 8bit files, but retain 4x more luminance values per color channel, and therefore 64x more shades in total.
- For the same content and duration, Mavic 2 Pro files, should therefore be 66% larger (example 1000MB for Mavic1, 1666MB for Mavic2 - for 133 seconds of footage).
- It has been mentioned here that H.265 requires more processing power on a computer, due to the need of more complicated decompression. On my computer, I did not see a significant difference yet.
- Taken together, the increase of bit depth (8>>10), and the increase of the bit rate (60>>100) should lead to a significantly cleaner image on the Mavic 2 Pro. We knew that already, but now there are a more numbers to it ;)

ygrabo Posted at 2018-9-3 08:21
FACTS (talking 4K here):

- The Mavic 1 Pro can record with H.264 compression only (60Mbit per second).

Hi, Ygrabo. Thank you for sharing this information with us. This will really help our co-pilots regarding on this matter. Thank you for choosing DJI.