[10:37 Tue,8.February 2022 by Thomas Richter] |
If a camera does not have sufficiently good optical or electronic image stabilization itself, or if you shoot without a gimbal and the footage looks shaky, then the use of a tool for subsequent video stabilization is often advisable. Gyroflow is such a free software for post production stabilization of video, which uses the motion data recorded by a gyro sensor for stabilization in post production (and is even able to correct rolling shutter artifacts).
Normally, post-production video stabilization works by means of a motion analysis of the images (motion estimation), i.e. an algorithm has to detect which image movements are intentional camera movements of the user, which are independent movements of the image subject and which are unwanted shakes. If the latter are detected, the respective algorithm tries to stabilize the video by cropping all frames of such a sequence and thus ultimately obtain smooth cinematic shots. However, the algorithm can also be wrong or not detect such movements well enough to really improve shaky video sequences. Such stabilization works better if the algorithm knows how the camera moved during the recording - then it can distinguish camera movements from movements in the frame or shake caused by bumps much better. It can do that if parallel to the video data is recorded by means of an integrated (or external) accelerometer, which gives information about the camera movements. And that&s exactly what Gyroflow does, using precise lens calibration, rolling shutter corrections and customizable stabilization algorithms to achieve stabilization that works regardless of lighting conditions or moving subjects. ;) Gyroflow User Interface Which cameras support Gyroflow?A prerequisite for stabilization via Gyroflow is the presence of gyro data recorded in parallel with the video in question. Some cameras support the recording of motion data out of the box thanks to an integrated gyro sensor, such as many cameras from Sony (like the A1, A7C, A7R IV, A9 II, FX3/6 or ZV-E10), the action cam GoPro (Hero 5 and higher) or the Insta360 panorama camera. For use with other other cameras without an integrated gyro sensor, a GoPro, a smartphone including a suitable app or a special external sensor can be used as a gyro data logger. Gyroflow - for which operating system?Gyroflow ist ein Standfalone Open Source Tool (wahlweise auch mit deutscher Benutzeroberfläche), welches plattformübergreifend für Windows, macOS (auch M1), Linux (Android und iOS Apps sind in Arbeit) kostenlos verfügbar ist - hier der  Download der verschiedenen Versionen. Gyroflow ist auch in Form eines Plugins für die Videoschnittprogramme Adobe Premiere und Blackmagics DaVinci Resolve geplant, aber noch nicht fertig. Eine ausführliche Dokumentation und Anleitungen finden sich hier. (Danke an Rush für die Meldung) HauptfunktionenDie vollständige Liste aller Funktionen findet sich hier, die Highlights: - Unterstützung für Gyrodaten von Sony-Kameras - Einfache synchronisationsfreie Stabilisierung für die GoPro Hero 8 und neuer, auch bei aktivierter Hypersmooth-Funktion. - Unterstützung für bis zu 16-Bit-Videomaterial - GPU- und Hardware-Beschleunigung samt Multithreading für Echtzeit-Wiedergabe und schnelles Rendering - Rolling shutter correction for very shaky footage and improved stabilization algorithms - Cross-platform: currently works on Windows, macOS (including M1), and Linux - Android and iOS apps planned - Supports and renders 10-bit video (and higher, up to 16-bit 4:4:4, direct YUV rendering without data loss - no conversion to RGB) - Adaptive zoom (dynamic cropping) - Multiple algorithms for smoothing video alignment, including horizon leveling and smoothing adjustment for individual axes - Supports variable and high frame rate video, all calculations are based on timestamps - x264, x265, ProRes, and PNG outputs, with x264 and x265 fully GPU-accelerated - Automatic lens calibration - Built-in lens profiles for GoPro HERO 6, 8, 9, and 10 in all shooting modes ;) List of supported cameras or sensors for gyro data- GoPro (HERO 5 and later) - Sony (A1, A6600, A7c, A7r IV, A7 IV, A7s III, A9 II, FX3, FX6, RX0 II, RX100 VII, ZV1, ZV-E10) - Insta360 (OneR, SMO 4k, GO2) - Betaflight Blackbox (CSV and binary) - via smartphone App ( Sensor Logger (Android), G-Field Recorder (iOS) and Gyro - Runcam CSV (Runcam 5 Orange, iFlight GOCam GR) - WitMotion Sensor (WT901SDCL binary and *.txt)  more infos at bei gyroflow.xyzdeutsche Version dieser Seite: Gyroflow: Kostenloses Tool zur Videostabilisierung und Rolling-Shutter Korrektur |
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