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Different quality audio stream between live and recordings

Added by Sandy McCarthy over 2 years ago

Wife had recently noticed that the playback volume on recordings was lower than when watching the same channel live. Investigated a bit and noticed the audio stream was different. Example being BBC 1 HD live showed audio stream as ff-ac3, 32 bits, 48000 Hz. When I record the same channel and playback the audio stream changes to pt-ac3, 8 bits, 48000 Hz. I presume its the drop from 32 to 8 that is lowering the audio quality and making it sound lower.

Recording stream profile is 'pass' and I haven't changed any codec settings so can't quite work out why it plays live OK but then only records at 8 Bit. Also not sure why ff-ac3 changes to pt-ac3.

Backend is Tvheadend 4.3.0~pre+202204221649-0 on Ubuntu 20
Frontend is Libreelec 19.4 on RPI4 with Tvheadend HTSP Client 19.0.6.1
In the UK with Freesat if that helps.


Replies (1)

RE: Different quality audio stream between live and recordings - Added by Marc Ominus over 2 years ago

What happens when you record the whole transponder TS (e.g. BBC 1 HD) and look inside for BBC 1 HD
and then the individual recording from stream profile with 'pass'?

Maybe mediainfo of both files would help as well.

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