Extract/Decode Opus Audio from Webm

[esen...@gmail.com]

Is there any example on how to extract/decode Opus audio from Webm file format?

I've found a webm parser source example:

for (int i = 0; i < frameCount; ++i) {

          const mkvparser::Block::Frame& theFrame = pBlock->GetFrame(i);

          const long size = theFrame.len;

          const long long offset = theFrame.pos;

          theFrame.Read(&reader, data);

          // here

          printf("\t\t\t %15ld,%15llx\n", size, offset);

        }

However I've tried to feed the 'data' directly into Opus Decoder, and it generated garbage.

How to do it properly?

[Brendan Bolles]

On Friday, May 20, 2016 at 10:57:04 AM UTC-7, esen...@gmail.com wrote:

Is there any example on how to extract/decode Opus audio from Webm file format?

The Adobe Premiere plug-in has code to decode Opus:

https://github.com/fnordware/AdobeWebM/blob/master/src/premiere/WebM_Premiere_Import.cpp#L2625