Mpeg2 program stream, Mpeg2 mxf – Grass Valley EDIUS Pro v.6.5 User Manual
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Project Operations
EDIUS - Reference Manual
MPEG2 Program Stream
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[Basic Settings] tab
[Extended Settings] tab
MPEG2 for GF I frame only (100 Mbps)/MPEG2 for GF Long GOP (50 Mbps)/MPEG2 for
XDCAM HD422/MPEG2 for XDCAM HD LP/MPEG2 for XDCAM HD SP/MPEG2 for
XDCAM HD HQ
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Items that can be configured are the same as [MPEG2 Program Stream].
MPEG2 MXF
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[Segment Encode]
Check this item to export a clip of a raw source without re-encoding. Output
speed is fast.
[Size]
Select an image quality.
[Quality/Speed]
Select quality from the list. The higher the quality, the more time it takes to be
encoded.
[Bit Rate]
Select a bitrate type.
[CBR] sets a fixed transfer rate, allocating a fixed number of bits during the
encoding process. Select a bitrate from the [Average(bps)] list. You can also
enter a value directly.
[VBR] sets a variable transfer rate, altering the number of assigned bits
according to the complexity of the movement or image quality. Compared
with [CBR], the media volume can be used more efficiently, and this enables
more consistent image quality overall. Select a bitrate from the
[Average(bps)] and [Maximum(bps)] lists. You can also enter a value directly.
[Field Order]
For interlace, a field order can be selected.
[Chroma Format]
Select a YUV pixel format from the list.
[Profile & Level]
Select a profile & level. If [Chroma Format] is [4:2:0] and [4:2:2], the profile
will be set to Main Profile and 422Profile, respectively. The level for SD
image quality will be Main Level, and the level for HD image quality will be
High Level. The profile & level changes according to the format selected in
[Chroma Format].
[GOP Structure]
For MPEG, a certain number of frames is considered as a group, and
operations such as compression/enlargement and cut editing are performed
on a GOP basis. A GOP comprises “I frame”, “P frame” and “B frame”. The I
frame allows images to be reproduced independently, the P frame is for
recording and reproducing only the differences with the preceding image,
and the B frame reproduces images from the differences in the preceding
and following images. Select I, P and B frame patterns of the GOP from the
list. Normally, select [IBBP].
[I-Frame Only] is comprised of only I-pictures. Editing is made easier, but the
amount of data increases in size.
[Picture count]
Set the number of frames included in a group.
[Closed GOP]
Check this item to complete information within each GOP. Although the
amount of data increases, the video can be re-edited using software that
supports GOP-based editing. Normally, leave this item unchecked.
[Segment Encode]
Check this item to export a clip of a raw source without re-encoding. This
increases the output speed.