In the transcoder template we have for all bitrates (H.264 video):
<!-- AAC, PassThru, Disable -->
As soon as I specify AAC for codec and bitrate other than source, the audio is toast. Here is what we tried:
1.) Transcoder template set to AAC, 96Kbps. Source mp3, 128kbps, stereo, 16bit, 44.1KHz. Result: no audio on transcoder output.
2.) Transcoder template set to AAC, 96Kbps. Source AAC LC, 128Kbps, 44.1kHz stereo. Result: pitch shift
3.) Transcoder template set to AAC, 96Kbps. Source AAC LC 44.1kHz mono. Result: heavy audio distortion.
I tried also some other bitrates for transcoder template like 32Kbps, 64kbps and 128Kbps, but no improvement.
1.) What should audio transcoder be capable off? It seems that all I tried is a failure.
2.) Is it possible on the transcoder to change sampling frequency?
3.) Can I convert two stereo channels to one mono?
4.) Can I convert mono to stereo in the transcoder?
5.) Can I change bit depth with transcoder?
For low bitrate streams we could use 32Kbps, 44.1Khz, 16bit, mono. Input can be stereo or mono, AAC or mp3 from 32Kbps to 128Kbps, 16bit. Is that something that we can hope to achieve with Wowza?