Constraints

Before using Media Live, understand the following constraints.

**Table 1** Resource constraints
Item	Description
Number of channels	A tenant can create a maximum of 500 channels. To create more channels, submit a service ticket.

**Table 2** Function constraints
Item	Description
Channel	Except for channels whose input type is FLV_PULL, all other channels allow only one input stream and can output streams of multiple bitrates only after transcoding.

**Table 3** Client constraints
Item	Description
Encoding format	In iOS 16.0 or later, the maximum HE-AAC audio bitrate is 64 kbit/s. This constraint does not apply to AAC-LC.
Client	If the displayed segment duration of the source stream is different from the actual segment duration, the audio and video may be out of sync. To solve this potential issue, the client should support audio-to-video synchronization.