2017

Clip Name field Enter the name to use when importing the clip. Enabled if Name is set to Enter Clip Name.
Image Settings
Aspect Ratio box Select the aspect ratio assigned to imported clips. Enter Pixel and Enter Aspect affect pixel
and frame a pixel and frame aspect ratios respectively. You might need to change the aspect ratio as many
applications erroneously write to exported files a pixel aspect ratio of 1 (a square pixel), even for formats
that have non-square pixels (NTSC, PAL).
Viewing the clip in the Player with the specified aspect ratio requires you to enable, in the Player, Options
➤ Show Viewing Settings ➤ Use Ratio. The Previewer in the MediaHub always displays clips using the
specified aspect ratio.
Note that the application internally uses a frame ratio, not a pixel ratio. To specify a pixel ratio, you must
select Enter Pixel Aspect Ratio; Aspect Ratio from Resolution and Aspect Ratio from Header are interpreted
as frame ratios.
Aspect Ratio field Enter the aspect ratio of the imported frames, as a Width:Height ratio. Enabled when the
Aspect Ratio box is set to Enter Aspect Ratio or Square Pixels.
YUV Decoding box Select the YUV colour space used by the clip to import. Because Smoke works in the
RGB colour space, it needs to translate YUV information into RGB. This setting ensures that the right decoder
is used for this. The Auto setting selects the colour decoder based on the resolution of the clip: Rec. 601 for
clips with a resolution lower than 720 lines, Rec. 709 for everything else. Specifying the wrong colour space
results in colours that are off.
Per Recommendation BT. 2020, UHD media should use the Rec. 2020 colour space. But this is rarely the case
at the moment: UHD clips use Rec. 709. The Rec. 2020 option is there is case you come upon a correctly
encoded UHD clip.
Include YUV Headroom button Enable to keep the YUV headroom information during clip import. Disabling
this option for clips that use the headroom (usually clips from cameras) results in clips with clamped black
and whites. Enabling this option for clips that do not use the headroom (usually clips from Final Cut Pro)
results in an imported clip with lowered contrast.
Canon Format Settings - Import
The following settings apply to all of Canon camera files.
Notes regarding Canon's XF-AVC codec.
■ Canon XF-AVC clips are OP-1a clips with LPCM 16- or 24-bit 48 kHz audio.
■ Canon XF-AVC media is recorded to a folder structure. Smoke interprets that structure to present in
MediaHub a clip that includes both audio and video tracks, in a manner similar to its processing of
Panasonic P2 media. Enable Browsing ➤ Essence Mode to browse the folder structure and access
directly the MXF media files.
■ Smoke supports both Intra and Long GOP flavors, as well as spanned clips.
Tips when importing Canon spanned clips:
■ Canon cameras can split the recording of a long clip in a series of smaller clips, either across many
memory cards (spans) or within a single memory card (breaks). Smoke rebuilds, from related spans or
breaks, a single clip, making it easier to import and manage. But this only works if you preserve the
camera original folder structure to be able to rebuild the spanned clips as the MXF files do not contain
enough information for that.
■ You can browse the individual segments by enabling Browsing ➤ Essence Mode.
142 | Chapter 6 Importing and Exporting Media