Codecs and file format compatibility
Pearl supports the following video and audio codecs.
Supported video codes
|H.264||H.264 is the default video codec configured for the channels on Pearl. This codec provides high quality video while using low bandwidth and is the preferred codec to use with the system.|
|Motion JPEG||Motion JPEG is suitable for live streaming and video; however, you can experience low quality images while using high bandwidth. Motion JPEG does not support audio.|
Supported audio codecs and bitrate guidance
AAC is comparable to MP3 and may even provide better sound quality at a similar sample bitrate. Supported sampling bitrate values are: 16, 22, 44 and 48K kHz.
The maximum bitrate for mono encoding of a 44 kHz signal is 264 kbps. For stereo, 320 kbps is supported. Note that lower bitrates (e.g. 32 kbps) with a 44 kHz signal may result in distorted audio.
MP3 provides a common audio format for audio storage. Supported sampling bitrate values are: 22 kHz, 44 kHz and 48 kHz.
Setting the channel bitrate to match the audio source's bitrate provides the best sound quality and avoids audio resampling. Most digital signals (HDMI or SDI sources) use 48 kHz. For analog signals, 44 kHz provides a good quality audio sample.
Web browsers that use Flash (FLV) do not support 48 kHz MP3 audio. When selecting this encoding, you must use a web browser that supports HTML5 or a media player to preview your channel.
Pulse Code Modulation (PCM) is a standard for digital audio in computer and other devices such as, digital telephone systems.
The Flash (FLV) plugin must be installed for your web browser to play back audio that's encoded as PCM. Web browsers that use Flash (FLV) do not support 48 kHz PCM audio.
Not all streaming and recording protocols support all combinations of video and audio codecs. The following table lists any video/audio codec compatibility considerations for the supported streaming formats on Pearl.
Video/audio codecs and formats for streaming
|Video Codec selected||Audio Codec selected||RTSP||FLV||MPEG-TS||MJPEG|
|H.264||No audio codec||ü||ü||ü|
|MJPEG||No audio codec||ü|
The following table displays the compatibility between the video/audio codecs and the supported recording formats.
Video/audio codecs and formats for recording
|Video Codec selected||Audio Codec selected||MP4 and MP4-Fragmented||AVI||MOV||MPEG-TS|
|H.264||No audio codec||ü||ü||ü||ü|
|MJPEG||No audio codec||ü||ü||ü||ü|