Kronos File

In stock
Delivers faultless media retiming in software

Why Kronos File? / Features


Enables unparalled run time adjustments of file-based assets with no perceived quality difference

Program duration changes of up to +/- 20%

Based on Alchemist File technology, Kronos File offers the very best in motion compenstaed image performance and audio pitch correction

Now with Adaptive Cadence Technology, enabling a single pass retime of media containing cadence

Now with Protected Segmnent Processing to preserve duration in key areas, such as credits, commercials or clock

Guarantees consistent quality with no user intervention – optimal results first time, every time

Typical applications:

Global broadcaster has a need reduce the duration of a program in order to fit more adverts into their playout schedule 

Media provider needs to create space to promote other valued content

A faciltiy needs to change the run time of a file to fit a specif slot in the playout schedule

GV File V3.0 - What's new?

Kronos File Supports protected segments which can be defined in the xFile Client or based on an externally created marker file

Kronos File also now benefits from Adaptive Cadence Technology, enabling a single pass retime of media containing cadence

HDR to HDR processing to and from PQ / S-Log3 / HLG

HDR (PQ / S-Log3 / HLG ) down conversion to SDR (BT709 / REC601) using Grass Valley's Advanced Tone Mapping

SDR (BT709 / REC601) up conversion to HDR (PQ / S-Log3 / HLG )

Decoding of AAC audio is now supported for all relevant source file types.

Processing times have been reduced by up to 40%; the exact performance improvement will be system and conversion specific (positive improvements have been measured in most cases).

Timecode overlay


GV File V4.0 - What's new?


Enhanced audio routing – now fully flexible!

Prores decoding and encoding now enabled on all 64-bit operating systems

Added decoding of 32KHz, 44.1KHz and 96KHz audio

Added support for up 32 audio channels per stream (where appropriate)

Added non-adaptive HDR to SDR down mapping mode

Added custom transfer curves to tailor up/down/cross mapping

BT2020 and HDR metadata now included during encode (where appropriate)

Added decode and encode support for DNxHR wrapped in MXF OP1A

Added DNxHR 4:4:4 decode and encode

Audio channels can now be grouped for off-speed conversion to maintain respective phase

Improvement to small object performance for high frame rate Ph.C conversions

Added Full Screen Stretch conversion mode and overscan controls

Added 'Follow Input' (source resolution) mode, when generating Apple ProRes files

Added support for Nvidia RTX GPU family.

For full details  of all improvements, upgrades and added functionality see release notes.


GV File V4.0 - Trial Download - What happens next?

After you have downloaded the trial licence an Authorized Grass Valley reseller will be in contact. To locate an authorized reseller please CLICK HERE



Find out more at


File Wrappers


MXF OP1a, MOV (ProRes / DNxHD/ JPEG 2000/ DNxHR/ AVC-1 (decode only), MTS (AVCHD only), MJ2 (JPEG 2000 only), MP4 (H.264 Long GOP only), MPG (MPEG2 only)


Video Codecs


DNxHD, DNxHR, DVCPro 25/50/100, XDCAM HD, D10 (IMX 30/40/50), AVC-Intra 50/100, AVC-Intra RP2027 50/100/200, DPX* 10bit, Apple ProRes, JPEG 2000 (Lossy / Lossless / DCI), AVC-HD (MTS only), XAVC (I-Frame/Long GOP), MPEG2, H.264 Long GOP only


Video Formats


SD, HD and 3Gbps broadcast standards ; 2K,4K 8K and custom resolutions ; Custom frame rate (12-300Hz)


Conversion Modes


Motion Compensated Interpolating with audio pitch correction or re-sampling. Retiming modes ( constant / protected segments ). Retiming Processing ( Discontinuous cadence repaired , cadence maintained (2:2 / 2:3 / Mixed / Custom) . Duration Adjustment ( Percentage Squeeze / Stretch , Time Squeeze / Stretch , Target Duration , Job Specific Protected Segments ). Protected Segments (configured via marker file or GV File client )




48Khz PCM audio pass-through, PCM 96Khz Decode, AAC:32Khz, 44.1Khz, 48Khz Decode. 48Khz PCM Encode only, Audio Stream Routing, Audio Channel Shuffling, Audio gain and delay.




Closed captions 608/708 SMPTE 436M, Closed caption Line 21 IMX only




GV File Client, Watch Folder, FIMS Media SOA Framework V1.0.7.




Timecode handover




Aspect ratio conversion , Color space conversion (REC601 / BT709 / SMPTE 2020), RGB Legalization 700/721/735, Luma Clipper, Luma / Chroma / Black Level, HDR (PQ / S-Log3 / HLG) to SDR (BT709 / REC601) down conversion using GV’s Advanced Tone Mapping , HDR (PQ / S-Log3 / HLG) to HDR (PQ / S-Log3 / HLG), SDR (BT709 / REC601) to HDR (PQ / S-Log3 / HLG) up conversion


Operating Systems


Windows (64-bit) Server 2016/2012/2008 R2, Windows 7 / 8 / 8.1 / 10, Linux (RedHat, CentOS) , OSX 10.9 and 10.10 (Client only).


Hardware Requirements


Minimum Configuration


1 x 4 core 2.5 GHz processor, 1 or more GPUs (Multiple cards should be matched)


System Memory (SD/HD)


1 or 2 GPUs, min. 16GB, 3 or 4 GPUs, min. 32GB


System Memory (4K)


1 or 2 GPUs, min. 32Gb, 3 or 4 GPUs, min. 64Gb


AMD GPU Support


Min 2Gb for SD /HD, min 4Gb for 4K, FirePro, HD6000 Series**, HD7000 Series**, R7 Series**, R9 Series, AMD DRIVER (See AMD website)


Nvidia GPU Support


Min 2Gb for SD /HD, min 4Gb for 4K, Quadro, Tesla, GeForce GTX, GeForce RTX, NVIDIA DRIVER (See NVIDIA website)




Conversion times will vary depending on hardware specification. * Trial Feature. Not all GPU variants of each range have been verified by GV Engineering. ** These cards have not been verified by GV Engineering

© Copyright 2021 Grass Valley Canada. All rights reserved. Specifications subject to change without notice.