Talk:PCM: Difference between revisions
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: But does it play '''my''' 24-bit DVD PCM sample, [http://samples.mplayerhq.hu/A-codecs/pcm24/newedition-coolitnow.24bit-lpcm.vob found here]? --[[User:Multimedia Mike|Multimedia Mike]] 17:17, 12 April 2008 (EDT) | : But does it play '''my''' 24-bit DVD PCM sample, [http://samples.mplayerhq.hu/A-codecs/pcm24/newedition-coolitnow.24bit-lpcm.vob found here]? --[[User:Multimedia Mike|Multimedia Mike]] 17:17, 12 April 2008 (EDT) | ||
:: Of course. I've tested it my own dvd and with '''your''' vob too. --[[User:Elte|Elte]] 07:02, 13 April 2008 (EDT) | |||
::: I'll still need to test this for myself. I figured out the format by studying the PCM bytes in that sample. I wrote the decoder for xine and it always sounded just fine. The xine source code matches my original description. --[[User:Multimedia Mike|Multimedia Mike]] 10:39, 14 April 2008 (EDT) | |||
:::: Nevermind. I think I am starting to understand the situation. I think when I wrote the xine code, I was building 16-bit PCM samples out of the top and bottom bytes. When I wrote the Wiki description sometime later, I must have been a bit confused about the ordering. I will update the picture (and make a new picture for 20-bit as well). --[[User:Multimedia Mike|Multimedia Mike]] 11:18, 14 April 2008 (EDT) | |||
Latest revision as of 08:18, 14 April 2008
DVD 24-Bit PCM
description seems to be wrong. I managed to get my 24bit DVD example to be played by ffplay. For correctness I compared to mplayers output.
The byte packing seems to be like that:
- M = top byte = bits 23..16
- B = middle byte = bits 15..8
- T = bottom byte = bits 7..0
--Elte 05:45, 12 April 2008 (EDT)
- But does it play my 24-bit DVD PCM sample, found here? --Multimedia Mike 17:17, 12 April 2008 (EDT)
- Of course. I've tested it my own dvd and with your vob too. --Elte 07:02, 13 April 2008 (EDT)
- I'll still need to test this for myself. I figured out the format by studying the PCM bytes in that sample. I wrote the decoder for xine and it always sounded just fine. The xine source code matches my original description. --Multimedia Mike 10:39, 14 April 2008 (EDT)
- Nevermind. I think I am starting to understand the situation. I think when I wrote the xine code, I was building 16-bit PCM samples out of the top and bottom bytes. When I wrote the Wiki description sometime later, I must have been a bit confused about the ordering. I will update the picture (and make a new picture for 20-bit as well). --Multimedia Mike 11:18, 14 April 2008 (EDT)