Disable or decrease stream read buffer size

[zbyte]

Overview

I`m read RTSP stream with PyAV frame by frame. And for each frame make some processing. All good, but sometimes processing takes longer than the time between frames and my processed video starts lagging behind real time. This gap is constantly growing.
Obviously it's because of the input buffer.

Expected behavior

I want to decrease buffer size to one frame.

Actual behavior

To synchronize with real time i need read all frames from buffer.

Investigation

try set flag:
container.flags |= av.container.Flags.NOBUFFER

try set low delay:
container.streams.video[0].codec_context.flags |= av.codec.context.Flags.LOW_DELAY

Research

I have done the following:

• Checked the PyAV documentation
• Searched on Google
• Searched on Stack Overflow
• Looked through old GitHub issues
• Asked on PyAV Gitter
• ... and waited 72 hours for a response.