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Video export settings
In the Export Settings dialog
box, the options available on the Video tab depend on the format
you’ve specified. Video settings include one or more of the following
options. Video settings are listed under headings such as Video
Codec, Basic Video Settings, Advanced Settings, Bitrate Settings,
Video Hinter Track Settings, and GOP Settings. Note: Some capture
card and plug-in software applications provide their own dialog boxes
with specific options. If the options you see are different from
the options described here, see the documentation for your capture
card or plug‑in.
To save final rendering time: Use the same codec to capture and export.
Render previews of your sequences as you make changes.
Set the export quality setting to match the capture quality
setting.
- Video Codec or Codec
- Specifies the codec used to encode the video. The codecs
available depend on the format you choose.
Note: If you cannot
find options that your hardware‑based codec provides, see the documentation
provided by the hardware manufacturer. Some codecs included with video‑capture
hardware require that you set compression options in their own dialog boxes.
- Quality
- Specifies video quality. Generally, higher values increase
rendering time and file size. If available, drag the slider or type
a value to affect the exported picture quality. Increasing quality
above the original capture quality does not increase quality, but
may result in longer rendering times.
- Width or Frame Width
- Specifies the width of the frame of the output file in pixels.
- Height or Frame Height
- Specifies the height of the frame of the output file in pixels.
- Export As Sequence
- For still-image formats, select this option to export a section
of a sequence as a sequentially-numbered series of still-image files.
- Frame Rate
- Specifies
the frame rate of the output file in frames per second. Some codecs
support a specific set of frame rates. Increasing the frame rate
may produce smoother motion (depending on the frame rate of the
source clip, project, or sequence) but uses more disk space.
- Depth
- Specifies
the color depth in bits per channel (bpc): the number
of bits allocated per color channel. Options are 8 Bit, 16 Bit,
24 Bit, or 32 Bit.
- Encode Alpha Channel
- Enables encoding with alpha transparency, which lets you
encode video with the background removed so you can overlay the
subject of the video on top of other Flash content. Adobe Media
Encoder supports alpha channel transparency using the following
formats/codecs:
FLV using the On2VP6 codec.
QuickTime using Apple Animation or Apple None codecs at 32
bit color depth.
Uncompressed Windows AVI with codec set to None at 32 bit
color depth.
- TV Standard
- Conforms the output to the NTSC standard or PAL standard.
- Field Order or Field Type
- Specifies
whether the output file will have progressive frames or interlaced
fields, and if the latter, which field will be written first. Progressive
is the correct setting for computer display and motion picture film.
Choose Upper First or Lower First when exporting video for an interlaced medium,
such as NTSC, or PAL.
- Aspect or Pixel Aspect Ratio
- Specifies pixel aspect ratio. Select one appropriate for
the output type. When the pixel aspect ratio (displayed in parentheses) is
1.0, the output will have square pixels; all others will have rectangular
pixels. Because computers generally display pixels as squares, content
using non‑square pixel aspect ratios appear stretched when viewed
on a computer but appear with the correct proportions when viewed
on a video monitor.
- Render At Maximum Depth
- Specifies whether Adobe Media Encoder renders sequences
containing high bit-depth assets at their full bit depth.
- Bitrate Mode or Bitrate Encoding
- Specifies whether
the codec achieves a constant bitrate (CBR) or variable bitrate
(VBR) in the exported file:
- Constant
- Compresses each frame
in the source video to the fixed limit you specify, producing a
file with a fixed data rate. Therefore, frames containing more complex
data are compressed more, while less complex frames are compressed less.
- Variable Constrained
- Allows the exported file’s data rate to vary within a range you
specify. Because a given amount of compression degrades the quality
of a complex image more than it degrades the quality of a simple
image, VBR encoding compresses complex frames less and compresses
simple frames more.
- Variable Unconstrained
- Allows the exported file’s data rate to vary without limit.
- CBR
- Constant bitrate
- VBR, 1 Pass
- Variable bitrate, with the encoder making a single pass through the
file from beginning to end. Single-pass encoding takes less time
than dual-pass encoding, but doesn’t achieve the same quality in
the output.
- VBR, 2 Pass
- Variable bitrate, with the encoder making two passes through
the file, from beginning to end, and then from end to beginning.
The second pass prolongs the process, but it ensures greater encoding
efficiency, and often a higher quality output.
Note: When
comparing CBR and VBR files of the same content and file size, you
can make the following generalizations: A CBR file may play back
more reliably over a wider range of systems, because a fixed data
rate is less demanding on a media player and computer processor.
However, a VBR file tends to have a higher image quality, because
VBR tailors the amount of compression to the image content.
- Bitrate
- Specifies the number of megabits per second of playback for
the encoded file. (This setting is available only if you select
CBR as the Bitrate Encoding option.)
The following options
appear only if you select VBR as the Bitrate Encoding option:
- Encoding Passes
- Specifies the number of times the encoder will analyze the clip
before encoding. Multiple passes increase the time it takes to encode
the file, but generally result in more efficient compression and
higher image quality. (Adobe After Effects doesn’t support multiple
encoding passes.)
- Set Bitrate
- Available only for the QuickTime format. Select to keep the
bitrate of the output file constant.
- Bitrate [kbps]
- Available only for the QuickTime format. Select if you want
to determine the bitrate. Then, drag the slider until the hot text
displays the desired value.
- Maximum Bitrate [Kbps]
- Specifies the maximum bitrate you want the encoder to allow.
- Average Video Bitrate [Kbps]
- Specifies the average video bitrate you want the encoder
to allow.
- Target Bitrate [Mbps]
- Specifies the average video bitrate you want the encoder to
allow when encoding video using the H.264 video codec.
- Peak Video Bitrate [Kbps]
- Specifies the top bitrate you want the encoder to allow.
- Minimum Bitrate
- Specifies the minimum number of megabits per second of playback
you want the encoder to allow. The minimum bitrate differs according to
the format. For MPEG‑2‑DVD, the minimum bitrate must be at least
1.5 Mbps.
- Allow Interlaced Processing
- Select
this option if the video content in the sequence is interlaced and
you are exporting to a noninterlaced medium, such as motion picture
film or progressive scan video. Deinterlacing can also make it easier
to apply high‑quality effects in another program, such as After
Effects. If the sequence content does not have fields, don’t select
this option; instead select No Fields from the Fields option.
- M Frames
- Specifies the number of B frames (Bi‑directional frames)
between consecutive I frames (Intra‑frames) and P frames (Predicted
frames).
- N Frames
- Specifies the number of frames between I frames (Intra‑frames).
This value must be a multiple of the M frames value.
- Optimize Stills or Expand Stills
- Select this option
to use still images efficiently in exported video files. For example,
if a still image has a duration of 2 seconds in a project set to
30 fps, Adobe Premiere Pro creates one 2‑second frame instead of 60
frames at 1/30 of a second each. Selecting this option can save
disk space for sequences and clips containing still images. Deselect
this option only if the exported video file exhibits playback problems
when displaying the still images.
- Keyframe Interval [Seconds] or Key Frame Distance (Frames)
- Select
and type the number of frames after which the codec will create
a keyframe when exporting video.
- Simple Profile
- Available only when exporting in the FLV video format using
the On2VP6 codec, selecting Simple Profile optimizes high-resolution
video content that will be played back on older computers or other
devices with limited memory and processing resources.
- Undershoot [% target]
- Available only when exporting in the FLV video format using
the On2VP6 codec, this option lets you specify the percentage of
the target data rate to shoot for so that additional data is available
in the buffer to improve difficult sections.
- Quality
- Available only when exporting in the FLV format, this option
lets you specify a balance between encoding quality and the time
it takes Adobe Premiere
Pro to encode video.
- Good
- Strikes a balance between image quality and the amount of
time it takes to encode video. This is the default value.
- Best
- Creates the best possible image quality, but will take substantially
longer to encode video.
- Speed
- Specifies that the video be encoded as fast as possible,
however, the image will be of lower quality. Recommended for video
content used in testing deployments.
- Closed GOP Every
- Specifies the frequency of each Closed Group of Pictures (Closed
GOP), which cannot reference frames outside of the closed GOP. A
GOP consists of a sequence of I, B, and P frames. (This option is
available if you choose MPEG‑1 or MPEG‑2 as the format.)
- Automatic GOP Placement
- When selected, sets the placement of Group of Pictures (GOP)
automatically. (This option is available if you choose MPEG‑1 as the
format.)
Note: MPEG‑1 and MPEG‑2 formats include numerous advanced
options not listed here. In most cases, selecting a format or preset
designed for your target output sets the appropriate options automatically.
For detailed information on options not listed, consult the specifications
for the MPEG‑1 (ISO/IEC 11172) and MPEG‑2 (ISO/IEC 13818) formats.
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