What software / application are you using to watch?ģ. Are you watching satellite HD or terrestrial HD?Ģ. The best is OGG Vorbis, very similar qualities have AAC and MP3, MP2 has the lowest quality at. However the OP didn't mention C4HD (which is only FTA on Freeview HD not Freesat) so I suspect they are using satellite.ġ. So Lossless audio will always sound better than Lossy. MP2 has a good compression rate, produces small file size. Unlike other converters, this tool works with text navigation. However, if you are a beginner, you may find this too complicated. Can I convert MP2 to AAC in FFmpeg Yes, you can.
So for Freeview HD channels that have AD (and I think they all have to) the choice is either MP2 or AAC - and AAC is by far the better quality choice? Most media players, including YouTube, support the MP2 audio format (MP3 is much more popular for PC). AAC, which was created to be the successor to the MP3 format, often produces superior sound quality than MP3 when compressed at equal bit rates. The chipsets in most set top boxes don't allow for different codecs to be used for receiver-mixed audio description - and there wasn't an AC3 AD solution available ISTR. HOWEVER the BBC and ITV (don't know about C4) are using AAC as it is the only single-codec solution available for receiver-mixed audio description (allowing less bandwith to be used).
On terrestrial HD (aka Freeview HD DVB-T2) - the UK standard allows for either AC3 or AAC. However, at the higher bitrates of more than 256kbps, MP2 is as good as MP3. Is 256 Kbps AAC good quality A higher bit rate is better, so a 256 kbps MP3 or AAC file is better than a 128 kbps file. If possible, use WAV files to get the fullest listening experience. However, each file has a purpose and can be a good choice for listening to music. MP3 is more efficient on encoding and allows for decent quality at the bitrates of around 128kbps. Overall, WAV retains more of the sound than AAC and MP3. (BBC HD, BBC One HD, ITV1 HD - though MP2 is often used for a secondary pre-mixed audio description feed) As the predecessor audio format of MP3, MP2 is not only less efficient in audio encoding, but also compatible with limited devices. On satellite HD (aka Freesat HD), AC3 is being used by all of the channels not just using MP2.
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