flvmux: flvmux is not giving the request pad name as mentioned in sink template

Submitted by parithi

Link to original bug (#796436)

Description

For gst_element_get_request_pad() call, flvmux is returning pad with name "sink_0", instead of "video" as mentioned in sink template.

From my analysis figured out that, Aggregator is creating pad with name "sink_0" and flvmux is returning same pad to the application. This is creating problem when we try to probe flvmuxer's pad, with the name mentioned in sink template, in later point of time.

Version: 1.14.0