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How Can I compare audio volume level from two videos?

One of our clients complains about our output video (from DirectShow based application) increase the audio volume between 0.5db to 1db. How Can I check this? Is there any external tool that can help me to check audio volume signal?

Thanks!

tur
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1 Answers1

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You need to inspect your filter graph and identify if there are any filters in the audio path, which could modify the data. You can insert a filter that gets you audio stream between the audio renderer, or earler in the pipeline; then when you grab the data, you can calculate volume levels and compare to reference values.

Small discrepancies (up to 1 dB, or slightly higher) can be a result of different level calculations or downmixing, yours or taking place somewhere on the way.

Roman R.
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  • Thanks for the answer, but what really I'm looking for is an external app two compare the two videos (original and destination). I don't want touch direct show graph. – tur Aug 28 '15 at 09:02
  • I suppose http://SuperUser.com is a better place to look for an external app/tool. – Roman R. Aug 28 '15 at 09:11