Rockbox mail archive
Subject: Re: LOW_WATER and high bitrates
From: Alex Gitelman (alex_at_fg-soup.com)
Two weeks old build didn't have that problem.
I think Eric's suggestion sounds pretty good.
Wednesday, July 31, 2002, 9:45:17 AM, you wrote:
ST> It sounds like there is some other problem causing your skips. I did some
ST> testing with a dynamic low water mark and I found that a low water mark of
ST> 0x32000 was enough for 320kbit files. I haven't tried this with the latest
ST> builds though as this was based on a 2 week old build. I don't have my
ST> results with me now but I think I found that a 320kbit file will require
ST> more data after about 53 seconds of playing.
ST> I think a good solution to this problem would be to have dynamic
ST> watermarks. After learning what bitrate the song is at. Dynamically
ST> adjust the watermark to reflect this. VBR file could be a bit of a
ST> problem though.
>> -----Original Message-----
>> From: Alex Gitelman [mailto:alex_at_fg-soup.com]
>> Sent: 31 July 2002 17:06
>> To: rockbox_at_cool.haxx.se
>> Subject: LOW_WATER and high bitrates
>> As I mentioned before I was getting skips on 320Kbit
>> tracks. It got especially bad after last change to mpeg.c,
>> so I went into mpeg.c and for experiment changed MPEG_LOW_WATER
>> from 0x40000 to 0x160000 (0x80000 improved situation but did fix
>> the problem completely). After that it seems to play OK. It takes a
>> while to start playing though and probably is not easy on HD and
>> battery. So probably other solution should be found.
>> My wild guess is that for high bitrates disk reading just does not
>> have enough speed to be faster then playing.
Page was last modified "Jan 10 2012" The Rockbox Crew