Menu

Show posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Show posts Menu

Topics - hateom

#1
I know this topic comes back over and over but I decided to test it out once again as the compression algorithms on YouTube and Vimeo change from time to time.
Even the videos that are already uploaded get re-compressed occasionally.
In this post I present the current state of the compression results and I try to show if it's worth to upscale 1080p video to 4K (even just for 1080p playback).


Because the 4K video was rendered using 50bmps bitrate I wanted to see if there is any difference between 10bmps and 50mpbs of the 1080p video.
Here's 100% crop of the face details (click to zoom in):



The difference between 1080p in both YouTube and Vimeo is very small. Both services compress the image quite a bit and we can see a lot of artifacts in the background. Increasing the bitrate doesn't change anything – the video is re-encoded on the server anyway so there is no point in uploading a bigger file.
The last column with the 4K clips looks way better than 1080p versions. Let's have a closer look.

1080p playback

Below is the comparison of 1080p clip and 4K clip both played at 1080p at youtube:





We can clearly see that even for playback at 1080p the difference in quality and sharpness is huge. This is true for both Vimeo and YouTube.

You can read a bit more about the topic and the workflow on my blog here:
timeinpixels.com/2016/07/upscaling-1080p-videos-youtube-vimeo/

Hope this helps someone! Let me know what you think.
#2
Hello guys,

I would like to share with you what I found out recently - DaVinci Resolve 12 supports CR2 (Canon RAW) natively, which means that you can import CR2 file sequences directly and use as regular media. Even if you are not shooting with Canon you can convert your pictures to DNG using a free tool from Adobe and it will work just fine too.

Whi this might be useful for you? The BIG reason is that Resolve utilizes the GPU heavily. As opposed to for example After Effects.
I ran a few tests in both AE and Resolve with a time-lapse sequence shot using Canon 5D Mark III. Here's what I got in the playback:

1. After Effects: 0.25 FPS
2. Davinci Resolve: 12 FPS!

48 times faster... I checked the CPU & GPU usage, and it's clear that AE is using only CPU for the playback and rendering, while Resolve uses GPU 100% of the time.
The difference is huge. If we apply smart caching in Resolve, after a few minutes of waiting we can get real-time playback and grade the footage smoothly having the RAW underneath all the time (in case we want to make some adjustments).



You can check my video and post about the above experiments here:
http://timeinpixels.com/2015/08/processing-time-lapses-with-resolve-12/

Let me know what you think and if this would be a useful workflow for you.
One last remark - Resolve is FREE!

#3
Hi guys,

I have just published a new post on my site describing how to properly do the roundtrip from Resolve to Premiere and back to Resolve using MLV files.
There are a few problems that we should be aware of and they can make the roundtrip a real mess.
I myself lost a few hours trying to fix a broken project - hopefully this article will help you avoid these :)

http://timeinpixels.com/2015/02/common-resolve-and-premiere-roundtrip-issues/



Steps described in the article:

1. Process MLV files with MLVFS
2. Generate Proxies with DaVinci Resolve (ISSUE #1)
3. Import proxies into Premiere
4. Do the EDIT (ISSUE #2)
5. Export the timeline to XML
6. Import the XML into Resolve, relink the footage to the RAW clips
7. Do the final grading
8. Export the graded clip
#4
I'm using Resolve more and more to colour correct and grade my ML RAW footage, and the more features I discover, the better the workflow gets for me.
I wrote small article describing how to improve the performance of Resolve allowing you to get realtime playback even with no proxy and OpenFX plugins applied (Neat Video, Film Convert, etc).

http://tomasz.cc/2014/12/improve-davinci-resolve-performance-3-steps/

It's nothing new, but when I have found these features it was a drastic change in my workflow.
Hope this helps you guys!
#5
Hey guys,

I've just posted a small test shot with 5D and bmpcc at the same time. Then I was trying to match them together as much as possible.
The end result isn't bad in my opinion.
I will post step by step guide soon with more examples soon.



Let me know what you think guys!

Cheers,
Tom
#6
Raw Video / MLV 3x crop, extension tubes, tick
September 21, 2014, 05:30:09 PM
My cat brought another one and I couldn't resist using my extension tubes and MLV 3x crop mode to take a few shots of the insect... :)



and here's the previous one a few months back:



Filmed with Canon 24-105mm and Helios 55mm + macro extension tubes, lit with some led panels.

Cheers,
Tom
#7
Raw Video / ML RAW reflections 5D3
September 09, 2014, 02:16:28 PM
Hi guys,

I have shot a first professional project last weekend using ML RAW on my 5DMK3.
2 full days of shooting, 4 KomputerBay 64GiB cards and a laptop to transfer the data immediately.
I was using MLRawViewer to preview the clips on location directly from cards.

I recorded over 1TB in total, no bad frames at all, camera didn't freeze, etc.
Seems ML is getting more and more stable.
I don't recommend using ML RAW in any commercial work, it's risky and you can lose the take that cannot be repeated.
However it seems that the probability of a failure is dropping down.
A few months back I was still getting "green/pink" frames or the camera had to be restarted by removing the battery.

All in all - the 5DMK3 is a very powerful camera when coupled with ML, and gives extremely good quality footage.
If you know the workflow downsides and they are not blocking you from using it, the quality will be rewarding.

Random frame from the project described above:
http://goo.gl/Oim7EK

Shot in 1080p 25fps.

Cheers,
Tom