Size of audio files on blueray discs?

[Espo99]

Do anyone know approximately how much space audio use to take on blue-ray discs?

I mean do a DTS-HD audio file on a 2hours blue-ray disc take like 1GB or is more like 5GB? Can´t find this information anywhere...

[Cornucopia]

File size = bitrate * running time. This may be complicated a little more with VBR audio like DTS-HD-MA, Dolby TrueHD, but it is still true.

Scott

edit: so for example, you have a 135 minute movie (main title). That's 8100 seconds. You want the LPCM 5.1 24/96 track. The bitrate for that is ~11Mbps. Which gives you a total filesize of ~10.86GB.

So it's just a matter of finding out the length (easy), and figuring out the bitrate (slightly harder, but still easy). LPCM is a simple bitdepth*channels*samplerate calculation. The lossless codecs will be variable, but ALWAYS less the the LPCM. The lossy codecs will be MUCH lower bitrates (they're as advertised).

[Cornucopia]

Your example of 2hour DTS-HD: That format has a constant bitrate of between 2.0Mbps and 6.0Mbps. So at the low end, your 2hour (7200 second) file should be 7200 * 2 / 8 = 1800MB or 1.75GB. At the high end, it would be 7200 * 6 / 8 = 5400MB or 5.27GB.

The encoded bitrate (of lossy encodes) all depends on what QUALITY you want to give it. 2Mbps = Fair quality, 6Mbps = Great quality.

Scott