Following are the supported frame properties:

_AbsoluteTime [float]
The frame’s absolute timestamp in seconds.

_ChromaLocation [int]
Chroma sample position in YUV formats:
0=left, 1=center, 2=topleft, 3=top, 4=bottomleft, 5=bottom.

_DurationNum [int]
Numerator of the frame’s duration. Filters that
modify the framerate should also change these values.

_DurationDen [int]
Denominator of the frame’s duration. Filters that
modify the framerate should also change these values.

_EncodedFrameTop [int]
Frame number (before pulldown) used to generate this frame's
top field.

_EncodedFrameBottom [int]
Frame number (before pulldown) used to generate this frame's
bottom field.

_FieldBased [int]
Describes the composition of the frame:
0=frame based (progressive), 1=bottom field first, 2=top field first.
Note that the GOP progressive flag is used to determine whether the
frame is progressive.

_FieldOperation [int]
Describes the field operation option in effect:
0=honor pulldown, 1=force film, 2=ignore pulldown.

_FieldOrder [int]
Display field order of the frame:
0=bottom field first, 1=top field first.

_Film [int]
Set if the frame is part of a 3:2 soft pulldown section.
Note that this uses the RFF history of several preceding
frames, and so is valid only when doing linear access.

_GOPClosed [int]
Set if the current GOP is closed.

_GOPNumber [int]
The 0-based GOP number that contains the frame. Note that
if this is set as the value x, then propShow displays it as
[x, y] where y is the 0-based frame number of the first frame
in the GOP.

_GOPPosition [int]
The GOP position field from the D2V file for the GOP containing
the frame.

_Matrix [int]
The matrix number field from the D2V file for the GOP containing
the frame.

_PictType [data]
A single character describing the frame type. It uses the common
IPB characters but others may also be used for formats with
additional frame types.

_ProgressiveFrame [int]
Set if the progress_frame flag is set for this frame.

_QuantsAverage [int]
The average quantizer value for the frame.

_QuantsMax [int]
The maximum quantizer value for the frame.

_QuantsMin [int]
The minimum quantizer value for the frame.

_RFF [int]
If _FieldOperation is 2 (ignore pulldown) then _RFF describes whether
the stream specifies that a repeat field operation is to be performed
on this frame. If _FieldOperation is 0 (honor pulldown) or 1 (force film)
then _RFF describes whether the frame was composed with field repetition.

_SARDen [int]
The denominator of the "pixel size" (PAR), also called the
Sample Aspect Ratio (SAR).

_SARNum [int]
The numerator of the "pixel size" (PAR), also called the
Sample Aspect Ratio (SAR).

_TFF [int]
If _FieldOperation is 2 (ignore pulldown) and _RFF is set, then _TFF
describes whether the stream specifies that the top field is to be repeated,
otherwise the bottom field is to be repeated. If _FieldOperation is
0 (honor pulldown) or 1 (force film) then _TFF is inapplicable and is set
to -1.
