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PIX 250i User Guide and Technical Information
23
Recor
ding
To discard the last take and delete the file (False take), press Stop (
) Rewind (
<<
) button. A
dialog box will appear warning that the last take will be deleted and indicate the file name. Use the
Control Knob to highlight OK and push the Control Knob to confirm.
Selecting Video File Resolution and Frame Rate
The PIX 250i can record video in numerous resolutions and frame rates. The Setup Menu option
[Video - File Resolution/Rate]
sets the resolution and frame rate of recorded QuickTime files. This
Setup Menu option also determines the resolution and frame rate of the live HDMI and SDI output
signals, except during playback. The PIX 250i can record QuickTime files in the following resolutions
and frame rates:
• 1080p30
• 1080p29.97
• 1080p25
• 1080p24
• 1080p23.976
• 1080i60
• 1080i59.94
• 1080i50
• 1080PsF30
• 1080PsF29.97
• 1080PsF25
• 1080PsF24
• 1080PsF23.976
• 720p60
• 720p59.94
• 720p50
• 720p30
• 720p29.97
• 720p25
• 720p24
• 720p23.976
• 576i50 *
• 480i59.94 *
When Setup Menu option
[Video - File Resolution/Rate]
is set to
Same as Video Input
, recorded
QuickTime files and video output signals will be of the same resolution and frame rate as the input
video signal.
* Standard definition recording is only available for ProRes 422 HQ, ProRes 422, and ProRes 422 Proxy.
Progressive Segmented Frames (PsF)
Some cameras output video signal in progressive segmented frames (PsF). PsF is a method for
transmitting progressive video in an interlaced stream. A device generates PsF signal by splitting
each frame into two segments. PsF segments are the same as interlaced fields in that one segment
represents the even lines of a frame and the other segment represents the odd lines of a frame. PsF
segments differ from interlaced fields in that there is no motion between each segment in a pair.
The PIX 250i will automatically sense PsF signal from most cameras that output PsF over SDI. This
is accomplished through the use of a flag inserted into the SDI signal by the camera. If a camera does
not insert this flag into the SDI stream or if it outputs PsF signal over HDMI, then the Setup Menu
option
[Video - Input PsF Detect]
can be set to
Interpret 1080i as PsF
. This will force the PIX 250i to
treat all 1080i signal as if it were PsF and deinterlace it accordingly.
Selecting a Video Codec
Setup Menu option:
[Video - Codec]
.
The PIX 250i has two families of intra-frame, DCT based codecs available: Apple ProRes and Avid
DNxHD, with five levels of compression for ProRes and four levels of data compression available for
DNxHD. Both codecs are intermediate codecs that assist the editing process by eliminating the need
to transcode video before importing into Final Cut (ProRes) or Avid (ProRes or DNxHD).
ProRes is a variable data rate codec; DNxHD is a fixed data rate codec. PIX 250i supports all com-
pression levels and bit rates of DNxHD and ProRes and automatically records the correct bit rate
dependent upon the video input resolutions and frame rate. The data rates indicated in the Setup
Menu item
[Video - Codec]
indicate the maximum data rate at 1080p30.
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