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Gyroflow: Advanced open-source gyro-assisted video stabilization - https://news.ycombinator.com/item?id=30259771 - Feb 2022 (65 comments)
Gyroflow: An open source advanced gyro-based video stabilization tool
11–20 of 42 posts
Re: Gyroflow: An open source advanced gyro-based video stabilization tool
#12It looks cool, though I still find myself looking for Hyperlapse[0] alternatives. Hyperlapse seemed like magic when announced, particularly, not needing to crop large parts of shaky videos [0] https://blogs.microsoft.com/ai/hyperlapse-siggraph-2014/
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Re: Gyroflow: An open source advanced gyro-based video stabilization tool
#13Earlier quoted context omitted.
When I last played with it I was able to get quite good results with an A6400 and a phone as the gyro (the camera does not natively provide the data), except for when the rolling shutter is extreme, at which point it falls apart. The camera's notoriously slow sensor readout seems to be more than Gyroflow can accommodate for when it gets pushed.
Why is gyro data required? Doesn't the video itself contain enough information about the movement in vast majority of cases?
Adobe (and others) have offered tools like Warp Stabilizer that analyze the image to calculate movement. In my experience they are able to smooth things out a bit but nothing compared to what a gryo can do. Plus those image based tools take a long time to calculate.
Re: Gyroflow: An open source advanced gyro-based video stabilization tool
#14It looks cool, though I still find myself looking for Hyperlapse[0] alternatives. Hyperlapse seemed like magic when announced, particularly, not needing to crop large parts of shaky videos [0] https://blogs.microsoft.com/ai/hyperlapse-siggraph-2014/
While it seems neat, the principle behind it seems to cause massive morphing and smoothing, and that's creating a lot or artefacting.
This is fine for gopro footage or stuff like that, but for production video, the aim is to retain as much information as possible until export. I think the level of artifacting is just unacceptable for general stabilisation needs - and with today's cameras being 4k and up, framing 10-15% wider to adapt to the stabilisation crops makes much more sense.
Re: Gyroflow: An open source advanced gyro-based video stabilization tool
#15Earlier quoted context omitted.
When I last played with it I was able to get quite good results with an A6400 and a phone as the gyro (the camera does not natively provide the data), except for when the rolling shutter is extreme, at which point it falls apart. The camera's notoriously slow sensor readout seems to be more than Gyroflow can accommodate for when it gets pushed.
Why is gyro data required? Doesn't the video itself contain enough information about the movement in vast majority of cases?
Software based stabilisation morphs and creates artifacts in the video because it's tough to track motion in space from erratic camera movements - using a gyro gives your software a neat little guide on camera position during the shot, making stabilisation much more precise.
Depends on applications! Doesn't matter if you're filming your child play baseball, but if you're shooting movies you want the best you can get!
Re: Gyroflow: An open source advanced gyro-based video stabilization tool
#16It looks cool, though I still find myself looking for Hyperlapse[0] alternatives. Hyperlapse seemed like magic when announced, particularly, not needing to crop large parts of shaky videos [0] https://blogs.microsoft.com/ai/hyperlapse-siggraph-2014/
Johannes Kopf, the main author behind the original Hyperlapse paper, is one of the researchers behind Localrf discussed here yesterday [0].
I think Hyperlapse Pro [1], which stitched patches from multiple frames together to create new frames after doing some 3D reconstruction and then recreating a smoother camera path was mostly replaced with Hyperlapse mobile [2]. The Pro version was really slow, but the mobile version, which used the original frames from the video, could run in a reasonable time on a phone with almost as good result. Hyperlapse Pro is still available to download [3], Hyperlapse mobile you have to find the APK elsewhere [4].
[0] https://news.ycombinator.com/item?id=36348483
[1] http://johanneskopf.de/publications/hyperlapse/first_person_...
[2] https://www.microsoft.com/en-us/research/wp-content/uploads/...
[3] https://www.microsoft.com/en-us/download/details.aspx?id=523...
[4] https://www.apkmirror.com/apk/microsoft-corporation/hyperlap...
Re: Gyroflow: An open source advanced gyro-based video stabilization tool
#17I use Gyroflow to stabilize GoPro footage from autocross events since I can't stand the left/right panning from GoPro's HyperSmooth stabilization. Gyroflow lets me disable stabilization on that axis and the results look great for my use case.
I’ve wondered if there was any other way to resolve that… it makes a lot of my footage unusable.
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Re: Gyroflow: An open source advanced gyro-based video stabilization tool
#18When stabilizing and shooting with a cinematic shutter speed (1/48s) you have the problem with motion blur from the camera shake. This blur looks very odd when stabilized. Does Gyroflow have any functionality or tips toward this?
Yes, stop using ND filters and use faster shutter speeds. Add fake motion blur. https://docs.gyroflow.xyz/app/getting-started/common-filming...
Re: Gyroflow: An open source advanced gyro-based video stabilization tool
#19I tried to use this with my Sony camera about two years ago and just could not get consistent results. Currently using Sony's Catalyst Browse which does a great job stabilizing the footage but the workflow is poor. Looks like Gyroflow has a plugin for DaVinci Resolve[1]. If the stabilization has been improved and could be done right in Resolve I will definitely us this. [1] https://docs.gyroflow.xyz/app/getting-start…
Too bad Sony has crippled Catalyst Browse so badly. It doesn't even do 10-bit exports, so I refuse to use it with my A7S III. For proper formats and 10-bit export you need Catalyst Prepare which is (surprise) a subscription based software.
My A7S III logs gyro data which Gyroflow happily reads.
Re: Gyroflow: An open source advanced gyro-based video stabilization tool
#20It looks cool, though I still find myself looking for Hyperlapse[0] alternatives. Hyperlapse seemed like magic when announced, particularly, not needing to crop large parts of shaky videos [0] https://blogs.microsoft.com/ai/hyperlapse-siggraph-2014/
For GoPros the real alternative to Gyroflow is paying for ReelSteady in GoPro Player. It is very good.