Live streaming videos, by nature, do not have timecode metadata encoded into the flv.
Sometimes,
SMPlayer can seek/skip flv files that don't have flv metadata
Or, you can try injecting timecode metadata into the saved flv file by using a FLV MetaData Injector such as
FLVMDI/FLVMDIGUI
However, FLVMDI/FLVMDIGUI is limited to file sizes of less than 700mb, and also sometimes will not work if the stream wasn't saved perfectly (absent any interruptions or hiccups in the video/audio)