epiphan video Pearl Nano, Руководство пользователя

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Pearl Nano User Guide Configure video encoding
Table 37 Video/audio codecs and formats for recording
Video Codec
selected Audio Codec selec-
ted MP4 and MP4-
Fragmented
AVI MOV MPEG-TS
H.264 No audio codec ü ü ü ü
H.264 PCM ü ü ü
H.264 MP3 ü ü ü ü
H.264 AAC ü ü ü ü
Configure video encoding
You can configure the video encoding settings for a channel using the Admin panel. Video encoding
settings include:
l
Video codec : The video codec determines the type of compression and decompression, and also
affects the video quality. Options are H.264 (default) and Motion JPEG.
l
Video encoding profile : This can be set to High, Main, or Baseline.
l
Frame size: The resolution applied to the channel when you stream, record, or output video to a
confidence monitor. This can be set to automatically match the input video's resolution or set to a
fixed resolution.
l
Key frame interval : How often a key frame that contains all the pixels is sent when streaming. The
longer the key frame interval, the smaller the video file size (and vice versa).
l
Limit frame rate : You can limit the frame rate for the channel.
l
Bitrate : If using the H.264 video codec, you can increase or decrease image quality by increasing or
decreasing the channel's Bitrate value. Video with a high level of motion and high resolution, such
as sporting events, requires a higher bitrate.
By default, Pearl Nano automatically uses the incoming video source frame size as the frame
size for streaming and recording when the channel has only one layout with a single video
source. If you're channel has multiple video sources or layouts, you must manually set a frame
size for the channel.
If you plan to switch layouts during a live stream, a fixed frame rate is recommended. This
avoids the stream from stopping and restarting due to frame size changes when switching
between single-source layouts that use different frame sizes.
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