Audio Seek Problems in Angular

Our audio player highlights the captions as it is playing. We have an audio player on our website that highlights the words as it's playing. Please see this video to see an example. If you play the video from the beginning then it works perfectly highlighting the words as it's playing.

However if you skip around then you the timestamps because out of sync by about 4 to 5 seconds. Please see the video to see it.

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However the same audio if you play from beginning it has no problems.

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You can see it demonstrated on this site at [login to view URL]

The sampling rate of the original file is 44KHz but when we have it transcribed it's 16KHz. It's a podcast player so we have no control over the file when it's streaming on our player. We have verified that all of the timestamps are perfect for each word. Each word has their own timestamp.

Here is an example used in the video of the mp3 file.

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If we change the sampling rate to the 16KHz works when playing on any player. The timestamps are aligned. However SEEKing a specific millisecond spot on the player gets thrown off by 4 to 5 seconds if we are streaming the 44KHz one. Evern 32KHz works perfectly. But 44KHz does not.

This audio has a sampling rate of 32 and seek works perfectly. [login to view URL]

We are using audio player videogular2 and using Typescript so I think maybe there is some calculation in the library that could be adjusted.

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Please help us to resolve this issue.

Thank you.

Skills: Angular.js, Javascript, Typescript, Audio Processing, Video Processing

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