How to get "has_b_frames" video property in NReco?

Question

I try to get "has_b_frames" value of video, but failed at select xml node.
The code:

var videoInfo = new FFProbe();
var root = videoInfo.GetMediaInfo(filename).Result.CreateNavigator();
root.Select("/ffprobe/streams");
root.MoveToNextAttribute();

the value of root is root value 1 and root value 2 respectively,
and the value of outerxml is outerxml value with XML visualizer.

So how can I get the attribute "has_b_frames" ?
Thank you

score 0 · Accepted Answer · answered Apr 11 '19 at 16:19

0

You need to use appropriate XPath selector, something like this:

var mediaInfo = videoInfo.GetMediaInfo(filename);
var has_b_frames = mediaInfo.Result.CreateNavigator().SelectSingleNode(
  "/ffprobe/streams/stream[@index=\"0\"]/@has_b_frames")?.Value;

answered Apr 11 '19 at 16:19

Vitaliy Fedorchenko

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Can I ask another quesion? What the difference between has_b_frames="2" and has_b_frames="1" ? – honeytoast Apr 12 '19 at 07:51
@honeytoast most likely this is value from https://ffmpeg.org/doxygen/3.2/structAVCodecContext.html#a686a77363668795c15c87b532cc455fa – Vitaliy Fedorchenko Apr 12 '19 at 10:17

How to get "has_b_frames" video property in NReco?

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