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Subject: Re[2]: LOW_WATER and high bitrates

Re[2]: LOW_WATER and high bitrates

From: Alex Gitelman <alex_at_fg-soup.com>
Date: Wed, 31 Jul 2002 10:49:38 -0700

Hi,
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

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