Playbin cant play high bit rate video whereas playbin3 can

[deepthips]

I tried to play a 4k h265 video using both playbin and playbin3 using
gst-launch. Video played properly when using playbin3 but not when using
playbin (got stuck in READY state).
The pipeline created internally (by both playbin and playbin3) is filesrc !
tsdemux ! h265parse ! avdec_h265 ! glimagesink
The stream is about 800 MB in size.

Then for experimentation, I truncated the stream to about 200MB and found
that playbin can play the stream.

Is there any high bit rate issue or buffering issue related to playbin.?  Is
there any additional option to be supplied along with gst-launch for
playbin?



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