[newbie] switching bitrate of live content

Forum|Forum|15 years ago
September 14, 2010
1 reply
854 views

Hi,

is it possible to receive live stream at bitrate lower than that which video is being recorded with? How to accomplish that? I know that play2 from NetStream class allows to switch between recorded videos at different bitrates, but what about live content? I cannot simply set bandwidth to lower using FMS because i need to be sure that framerate won't be affected, and there are also other simultaneous streams playing Any help appreciated...

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Ed_Chan

Participating Frequently

Dynamic Switching of Live is possible. Just like with On Demand, where you need to have multiple streams encoded in different bitrates that you switch between, for Live you need to publish multiple streams of different bitrates that you can switch between (using the same play2 API).

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Anonymous

Thanks... but I'm afraid that won't work for me because I can not afford to encumber publisher bandwidth multiple times for same content. Since publisher transmits best needed quality of content the ideal solution for me would be if the server could compress it lossly, but I assume that "FMS does not do any transcoding" : ) ? Are there any chances to use DVR with minimal lag to achieve this?

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Ed_Chan

Participating Frequently

FMS does not do any transcoding. Unfortunately, that's how dynamic streaming works; requires multiple bitrate streams. With a single stream, you'd need to do something with H264 and SVC; but neither FMS nor FP currently support SVC.

I'm not sure where you are going with the DVR suggestion. How does DVR help in switching to a lower quality stream?

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