Thanks for the quick responses, guys.
As far as the framerate is concerned, 60fps is pretty standard for 720p, isn't it? In fact, isn't that generally the definition of it? It's the output that I get from my DirecTV DVR, which is where I grabbed this from. The Hauppauge just encodes the input signal in hardware, so I can't change the framerate without re-encoding (ick!).
I tried the CBR recording that Davilla recommended and it was better in terms of dropped frames, but the quality was horrible. The log from that run is
here. The file is
here. I tried a higher bitrate CBR file last night and there were dropped frames everywhere. Incidentally, when I select "CBR" in HDPVRCapture, MediaInfo is reporting that the resulting file is VBR. I'll have to look into that...
The log from the "normal bit rate" run is
here. The log from the "low bit rate" run is
here.
I don't get any dropped frames on my 2.8GHz MBP with the "normal" clip, but it has a heck of a lot more horsepower than the mini.
The mediainfo output for the "low bitrate" sample is:
Code:
*** MediaInfo Mac // Plain text file report
2009-08-09 11:20:22 -0700
Information for File: 20090809_024256.m2ts.mp4
General / Container Stream # 1
Total Video Streams for this File -> 1
Total Audio Streams for this File -> 1
Video Codecs Used -> AVC
Audio Codecs Used -> ac-3
File Format -> MPEG-4
Play Time -> 1mn 30s
Total File Size -> 13.2 MiB
Total Stream BitRate -> 1 232 Kbps
SubTitle (Tag) -> Created with HDPVRCapture
Encoded with -> Lavf52.30.1
Video Stream # 1
Codec (Human Name) -> AVC
Codec (FourCC) -> avc1
Codec Profile -> [email protected]
Frame Width -> 1 280 pixels
Frame Height -> 720 pixels
Frame Rate -> 59.940 fps
Total Frames -> 5406
Display Aspect Ratio -> 16/9
Scan Type -> Progressive
Colorimetry -> 4:2:0
Codec Settings (Summary) -> CABAC / 4 Ref Frames
QF (like Gordian Knot) -> 0.015
Codec Settings (CABAC) -> Yes
Video Stream Length -> 1mn 30s 190ms
Video Stream BitRate -> 833 Kbps
Video Stream BitRate Mode -> VBR
Bit Depth -> 24 bits
Video Stream Size -> 8.96 MiB (68%)
Date of Original Encoding -> UTC 2009-04-04 16:00:00
Audio Stream # 1
Codec -> AC-3
Codec (FourCC) -> ac-3
Audio Stream Length -> 1mn 30s 208ms
Audio Stream BitRate -> 385 Kbps
Audio Stream BitRate Mode -> VBR
Number of Audio Channels -> 2
Sampling Rate -> 48.0 KHz
Bit Depth -> 16 bits
Audio Stream Size -> 4.14 MiB (31%)
Date of Original Encoding -> UTC 2009-04-04 16:00:00
Reasonable VBR bitrate:
Code:
*** MediaInfo Mac // Plain text file report
2009-08-09 11:21:10 -0700
Information for File: 20090809_023646.m2ts.mp4
General / Container Stream # 1
Total Video Streams for this File -> 1
Total Audio Streams for this File -> 1
Video Codecs Used -> AVC
Audio Codecs Used -> ac-3
File Format -> MPEG-4
Play Time -> 1mn 37s
Total File Size -> 84.7 MiB
Total Stream BitRate -> 7 272 Kbps
SubTitle (Tag) -> Created with HDPVRCapture
Encoded with -> Lavf52.30.1
Encoding Library -> Apple QuickTime
Video Stream # 1
Codec (Human Name) -> AVC
Codec (FourCC) -> avc1
Codec Profile -> [email protected]
Frame Width -> 1 280 pixels
Frame Height -> 720 pixels
Frame Rate -> 59.940 fps
Total Frames -> 5853
Display Aspect Ratio -> 16/9
Scan Type -> Progressive
Colorimetry -> 4:2:0
Codec Settings (Summary) -> CABAC / 4 Ref Frames
QF (like Gordian Knot) -> 0.124
Codec Settings (CABAC) -> Yes
Video Stream Length -> 1mn 37s 647ms
Video Stream BitRate -> 6 876 Kbps
Video Stream BitRate Mode -> VBR
Bit Depth -> 24 bits
Video Stream Size -> 80.0 MiB (95%)
Date of Original Encoding -> UTC 2009-04-04 16:00:00
Audio Stream # 1
Codec -> AC-3
Codec (FourCC) -> ac-3
Audio Stream Length -> 1mn 37s 664ms
Audio Stream BitRate -> 387 Kbps
Audio Stream BitRate Mode -> VBR
Number of Audio Channels -> 6
Sampling Rate -> 48.0 KHz
Bit Depth -> 16 bits
Audio Stream Size -> 4.51 MiB (5%)
Date of Original Encoding -> UTC 2009-04-04 16:00:00
CBR 2-3Mbps (CBR selected in HDPVRCapture, at least. I'm not sure why it's saying VBR below):
Code:
*** MediaInfo Mac // Plain text file report
2009-08-09 12:06:14 -0700
Information for File: 20090809_120237.m2ts.mp4
General / Container Stream # 1
Total Video Streams for this File -> 1
Total Audio Streams for this File -> 1
Video Codecs Used -> AVC
Audio Codecs Used -> ac-3
File Format -> MPEG-4
Play Time -> 1mn 25s
Total File Size -> 30.4 MiB
Total Stream BitRate -> 2 994 Kbps
SubTitle (Tag) -> Created with HDPVRCapture
Encoded with -> Lavf52.30.1
Video Stream # 1
Codec (Human Name) -> AVC
Codec (FourCC) -> avc1
Codec Profile -> [email protected]
Frame Width -> 1 280 pixels
Frame Height -> 720 pixels
Frame Rate -> 59.940 fps
Total Frames -> 5108
Display Aspect Ratio -> 16/9
Scan Type -> Progressive
Colorimetry -> 4:2:0
Codec Settings (Summary) -> CABAC / 4 Ref Frames
QF (like Gordian Knot) -> 0.047
Codec Settings (CABAC) -> Yes
Video Stream Length -> 1mn 25s 218ms
Video Stream BitRate -> 2 598 Kbps
Video Stream BitRate Mode -> VBR
Bit Depth -> 24 bits
Video Stream Size -> 26.4 MiB (87%)
Date of Original Encoding -> UTC 2009-04-04 16:00:00
Audio Stream # 1
Codec -> AC-3
Codec (FourCC) -> ac-3
Audio Stream Length -> 1mn 25s 216ms
Audio Stream BitRate -> 384 Kbps
Audio Stream BitRate Mode -> VBR
Number of Audio Channels -> 2
Sampling Rate -> 48.0 KHz
Bit Depth -> 16 bits
Audio Stream Size -> 3.90 MiB (13%)
Date of Original Encoding -> UTC 2009-04-04 16:00:00