Convert Polly file to OGG Opus

[marcusmolchany]

Currently the call to aws polly returns an mp3 and is sent to telegram as an audio file sendAudio. Ideally we would use the sendVoice command so that the audio file would appear as a voice message. Polly can only return mp3, ogg vorbis or raw pcm audio files. Telegram can only send ogg opus files as voice messages.

We need a way to convert the polly synthesized file into an ogg opus file.

https://core.telegram.org/bots/api/#sendvoice
http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/Polly.html#synthesizeSpeech-property

[alialeksandr]

Hello! Don't you know if this issue is solved in some way?

[marcusmolchany]

Hey @alialeksandr, it looks like the sendVoice command still only works with ogg opus. I think your best bet is to use node-ogg to decode the ogg vorbis file and encode that as an ogg opus file.