Here is the short lossless original captured 4K video file (5GB)
I recorded it in lossless NVENC_HEVC from the HDMI out with a laptop via Camlink 4K.
HEre is the longer 2min version, which was later transcoded into a LOSSSY Hevc
Pay attention to the veining of the leaves and every little detail!
What is your opinion about the video quality?
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Video quality is good. It's a good sensor for a consumer camera in well lit conditions
The re-encode removes some fine details and noise as expected, but it's still good considering the compression ratio is ~ 1:5 to 1:6
If you posted the default onboard compression recording, I suspect the foliage detail would be very mushy, especially in the shadow areas such as underneath the trees. That would show the difference between default, and if a user should spend extra on external recording
There is evidence that the camlink recording was quantized, as if some adjustments were made in 8bit - these don't negatively impact the image on this sample - but you can see gaps in a waveform. Maybe there are some settings you can adjust on the camlink or drivers
Last edited by Truthler; 30th Aug 2021 at 09:30.
I don't see a mistake - The 2nd link in the 1st post was already 10bit420 HEVC - "LOSSY HEVC.mkv"
Or did you mean original video, was the wrong original video ? ie . original recording was 8bit instead of 10bit ?
I bet either re-encode looks better than the default onboard recording
Yes, external recorder makes big difference. You should post example of onboard compression, to highlight differences
Things like waving trees/leaves/foliage are very hard to compress and will turn to "mush" when using default onboard compression
I think it is also the 1" sensor, the XMOR RS version.
Here is the development of XMOR sensors: https://www.framos.com/en/news/what-is-sony-s-exmor-technology-anyway
Other consumer camcorders have smaller sensors, with more noise and lower real (visible) resolution, even the newsest Canon & Panasonic models have smaller sensors, because they manufacture large sensors only for their big broadcast and cinema videocameras, Sony always gives bigger sensor even for high-end consumer models... That makes the difference!
Last edited by Truthler; 28th Aug 2021 at 15:43.
Last edited by Truthler; 30th Aug 2021 at 12:13.
If you recorded with specific settings, you have to use a LUT or tell the player what to use.
There is no metadata in the NVENC file that tells player what to do
e.g. if you record in slog2 or some other profile there is no way for player to know that so you get wrong playback
Do you think the screenshot you posted in post#5 is accurate ? Is that what you "see" in potplayer ? How about when you were there (if you can remember) ?
The main difference is just full vs. limited range. It's not actually using HLG to 709 mapping. So it's not really "smart" - it gets many camera footage wrong, because it simply cannot know what profile you shot with. You can se other player to use full range YCbCr to RGB , and it will look the same
In order to display camera footage correctly, you must use correct display LUT