Rockbox mail archiveSubject: Re: LOW_WATER and high bitrates
Re: LOW_WATER and high bitrates
From: Alex Gitelman <alex_at_fg-soup.com>
Date: Wed, 31 Jul 2002 10:49:38 -0700
Two weeks old build didn't have that problem.
I think Eric's suggestion sounds pretty good.
-- Best regards, Alex 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> Stu. 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. ST> ST> -eric >> -----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. >> Best... >> Alex >>Received on 2002-07-31