On 01/10/2023 21:31, MrBrunes wrote:
For encoding rates I appreciate the theory with historical programmes but I've found in practice that there are noticeably fewer blocky video artefacts with dashfhd1 vs SD.
It depends very much on the type of SD. Some more recent encodings are using XSD as opposed to SD, and they're awful - in wildlife programmes rivers flow stop-start, etc - but the older SD encodings to which I was referring were fine. It also seems to depend on who does the encoding, some occasional individual programmes were done really badly, and for them any re-encoding, even just again as SD, is likely to be an improvement, and that's probably what you're seeing with HD or FHD.
Comparing audio, MediaInfo says: hlshd1 AAC LC SBR 96kps 48kHz dashfhd1 AAC LC 128kbps 48kHz i.e. there is a difference with HD encodings, and I'd assume that given a lossy encoder then a higher bitrate is to be preferred.
I suspect the 96kps is probably a one-off error. For some time now, the BBC have been using 128kbps for everything (except possibly xsd, as I never download those I wouldn't know). ISTR that there was a time in the past when they tried higher audio bitrates for HD, but people complained that their equipment couldn't play them back, so they lowered them back to 128.
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