<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p><font size="-1"><font face="Verdana">I recently noticed that my
free disk space was creeping downward<font face="Verdana">,
and decided to investigate. I discovered that many
recordings made <font face="Verdana">since I switched from
0.28.<font face="Verdana">2</font> to 29.1 are
consistently larger--sometimes double or triple in size.</font></font></font></font></p>
<p><font size="-1"><font face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana">Looking further, I
noticed that the bit<font face="Verdana">rate of the
HD-PVR (not HD-PVR2) recordings seems to be much
higher than it shoul<font face="Verdana">d be. <font
face="Verdana">So<font face="Verdana"> </font>I
checked the recording profiles in mythtv-setup. </font></font></font></font></font></font></font></font><font
size="-1"><font face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font size="-1"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font
face="Verdana"><font
face="Verdana">I have
confirmed that the <font
face="Verdana">recordings
rules</font> in question are
using my Low Quality profile</font></font></font></font></font></font></font></font></font></font><font
face="Verdana">, <font face="Verdana">which</font>
has this for all three <font face="Verdana">(low,
med, high) </font>resolutions</font>:</font></font></font></font></font></font></font></font><br>
<br>
<font size="-1"><font face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font size="-1"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font
face="Verdana">Avg. Bitrate: <font
face="Verdana">45</font>00
Max<font face="Verdana">.
Bitrate: <font
face="Verdana">6<font
face="Verdana">2</font>00</font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font><br>
</p>
<p><font size="-1"><font face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana">W</font>hat is clear is that
recordings<font face="Verdana"> <font
face="Verdana">don't seem to be using this
value. <font face="Verdana">Taking the
output <font face="Verdana">of
mediainfo from a 0.28.1 recording and
comparing it to that of a <font
face="Verdana">29.1 recording of the
same program on <font
face="Verdana">another night </font>gives
this diff:</font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></p>
<p><font size="-1"><font face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana">#
diff /tmp/1 /tmp/2<br>
<font face="Verdana">5,6c5,6<br>
< File
size
: 835 MiB<br>
<
Duration
: 33 min 25 s<br>
---<br>
> File
size
: 2.52 GiB<br>
>
Duration
: 33 min 24 s<br>
8c8<br>
< Overall bit
rate : 3
490 kb/s<br>
---<br>
> Overall bit
rate :
10.8 Mb/s<br>
21c21<br>
<
Duration
: 33 min 25 s<br>
---<br>
>
Duration
: 33 min 23 s<br>
23c23<br>
< Bit
rate
: 2 929 kb/s<br>
---<br>
> Bit
rate
: 9 891 kb/s<br>
35,36c35,36<br>
<
Bits/(Pixel*Frame)
: 0.047<br>
< Stream
size
: 700 MiB (84%)<br>
---<br>
>
Bits/(Pixel*Frame)
: 0.159<br>
> Stream
size
: 2.31 GiB (91%)<br>
48c48<br>
<
Duration
: 33 min 26 s<br>
---<br>
>
Duration
: 33 min 24 s<br>
58c58<br>
< Stream
size
: 91.8 MiB (11%)<br>
---<br>
> Stream
size
: 91.8 MiB (4%)</font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></p>
<p><font size="-1"><font face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana">At the same time,
while a recording is ongoing<font
face="Verdana">, </font>the
output of <font face="Verdana">"v4l2-ctl</font>
-l" gives these values:</font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></p>
<p><font size="-1"><font face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font
face="Verdana">video_encoding
(menu) : min=0 max=2
default=2 value=2<br>
video_bitrate_mode (menu) :
min=0 max=1 default=1 value=0
flags=update<br>
video_bitrate (int) :
min=1000000 max=13500000
step=100000 default=6500000
value=13500000<br>
video_peak_bitrate (int) :
min=1100000 max=20200000
step=100000 default=9000000
value=20200000</font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></p>
<p><font size="-1"><font face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font face="Verdana"><font
face="Verdana"><font
face="Verdana"><font
face="Verdana"><font
face="Verdana">T</font>he
recording bitrates are
maxed. I<font face="Verdana">t's
as <font face="Verdana">t</font>hough
the values in the profile
aren't being used, even
though they are in the
range of acceptable values
(once you <font
face="Verdana">multiply
by 1000).</font></font></font></font></font></font></font></font></font></font></font></font></font></font>
Can Anyone else <font face="Verdana">with an HD-PVR
confirm this?</font><br>
</font></font></font></font></font></font></font></p>
</body>
</html>