Create doc on bitstream Analysis of YUView

[starxiang]

Hello, Is there any tutorial to teach me how to use the bitstream analysis function in YUView, thank you.

[ChristianFeldmann]

Hi. Sorry there is no tutorial in how to use it. But definitely a good idea to create one. So far you can:

• Look at the packets/NAL units in the compressed data stream
• Plot the bitrate over time (per Frame/AU)
• And something which I am working on currenclty: Look at the HRD decoding buffer fullness over time

[dpasqualin]

Hi @ChristianFeldmann , I was just about to ask about last bullet in your message. You showed on Demuxed2020 and it was really cool, so I'm looking forward to it :)

And thanks for the tool, the side-by-side comparison is already super useful for me.

[ChristianFeldmann]

Great to hear. The HRD stuff that I showed on Demuxed is already in the latest release. I only works for h.264/AVC so far though.

[dpasqualin]

HRD analysis worked here only after I added nal-hrd=vbr to -x264opts during encoding. Does it make sense? Should it be necessary? Thank you.

[ChristianFeldmann]

Hi. Yes it is necessary because otherwise x264 will not put the needed HRD SEI messages into the bitstream which are needed to perform the buffering analysis.