# Enumeration RemoteStreamFallbackType (/zh-CN/api-reference/rtc/web/enums/remotestreamfallbacktype)

> For AI agents: see the complete documentation index at [llms.txt](/llms.txt).

## Enumeration members [#enumeration-members]

<a id="audio_only"></a>

### AUDIO_ONLY [#audio_only]

<ApiSignature>

AUDIO_ONLY: = 2

</ApiSignature>

2: 网络较弱时，先尝试订阅视频小流。如果网络环境无法显示视频，则再回退到订阅纯音频流。

<a id="disable"></a>

### DISABLE [#disable]

<ApiSignature>

DISABLE: = 0

</ApiSignature>

0: 关闭回退策略，弱网时不对音视频流作回退处理。

<a id="high_stream_layer1"></a>

### HIGH_STREAM_LAYER1 [#high_stream_layer1]

<ApiSignature>

HIGH_STREAM_LAYER1: = 3

</ApiSignature>

ABR 拓展, 暂时不对外，以实际客户为主

<a id="high_stream_layer2"></a>

### HIGH_STREAM_LAYER2 [#high_stream_layer2]

<ApiSignature>

HIGH_STREAM_LAYER2: = 4

</ApiSignature>

<a id="high_stream_layer3"></a>

### HIGH_STREAM_LAYER3 [#high_stream_layer3]

<ApiSignature>

HIGH_STREAM_LAYER3: = 5

</ApiSignature>

<a id="high_stream_layer4"></a>

### HIGH_STREAM_LAYER4 [#high_stream_layer4]

<ApiSignature>

HIGH_STREAM_LAYER4: = 6

</ApiSignature>

<a id="high_stream_layer5"></a>

### HIGH_STREAM_LAYER5 [#high_stream_layer5]

<ApiSignature>

HIGH_STREAM_LAYER5: = 7

</ApiSignature>

<a id="high_stream_layer6"></a>

### HIGH_STREAM_LAYER6 [#high_stream_layer6]

<ApiSignature>

HIGH_STREAM_LAYER6: = 8

</ApiSignature>

<a id="low_stream"></a>

### LOW_STREAM [#low_stream]

<ApiSignature>

LOW_STREAM: = 1

</ApiSignature>

1: 在网络条件较差的情况下，自动订阅视频小流。