[MPlayer-users] PSNR Questions

[Ian]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Ian wrote:

> I might just recreate some figures, but it will have to wait until 
> tomorrow as I'm off out now ;)

I cut the output as much as I could . . .

********* First high-quality grab:

==========================================================================
Opening video decoder: [raw] RAW Uncompressed Video
VDec: vo config request - 768 x 576 (preferred csp: Planar YV12)
[PP] Using external postprocessing filter, max q = 6.
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is undefined - no prescaling applied.
videocodec: libavcodec (720x540 fourcc=47504a4d [MJPG])
Using constant qscale = 2 (VBR)
Selected video codec: [rawyv12] vfm:raw (RAW YV12)
==========================================================================
audiocodec: framecopy (format=1 chans=1 rate=44100 bits=16 bps=88200 
sample=2)
Writing AVI header...
Forcing audio preload to 0, max pts correction to 0
Pos: 120.0s   3001f ( 0%)  25fps Trem:   0min   0mb  A-V:0.000 [13959:705]
Writing AVI index...
Fixing AVI header...

Video stream: 13959.409 kbit/s  (1744926 bps)  size: 209460934 bytes 
120.040 secs  3001 frames

Audio stream:  705.600 kbit/s  (88200 bps)  size: 10584000 bytes 
120.000 secs
PSNR: Y:29.83, Cb:44.18, Cr:44.11, All:31.52

*********** 3-stage compression:

==========================================================================
Opening audio decoder: [pcm] Uncompressed PCM audio decoder
AUDIO: 44100 Hz, 1 ch, 16 bit (0x10), ratio: 88200->88200 (705.6 kbit)
Selected audio codec: [pcm] afm:pcm (Uncompressed PCM)
==========================================================================
MP3 audio selected
Building audio filter chain for 44100Hz/1ch/16bit -> 44100Hz/1ch/16bit...
Writing AVI header...
Pos:   0.9s     22f ( 0%)   0fps Trem:   0min   1mb  A-V:0.084 [0:63]
Skipping frame!
Pos:   1.3s     33f ( 1%)   0fps Trem:   0min   1mb  A-V:0.081 [0:63]
Skipping frame!
Pos: 120.0s   3001f (100%) 504fps Trem:   0min   0mb  A-V:0.012 [0:64]

CBR audio: 8000 bytes/sec, 209 bytes/block

Writing AVI index...
Fixing AVI header...
Recommended video bitrate for 650MB CD: 45375
Recommended video bitrate for 700MB CD: 48872
Recommended video bitrate for 800MB CD: 55865
Recommended video bitrate for 2 x 650MB CD: 90829
Recommended video bitrate for 2 x 700MB CD: 97822
Recommended video bitrate for 2 x 800MB CD: 111807

Video stream:    0.800 kbit/s  (100 bps)  size: 11996 bytes  119.960 
secs  3001 frames

Audio stream:   64.000 kbit/s  (8000 bps)  size: 963814 bytes  120.477 secs

==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
mjpeg: using external huffman table
Selected video codec: [ffmjpeg] vfm:ffmpeg (FFmpeg MJPEG decoder)
==========================================================================
audiocodec: framecopy (format=55 chans=1 rate=44100 bits=0 bps=8000 
sample=1)
Writing AVI header...
mjpeg comment: 'FFmpeg0.4.6b4654'
VDec: vo config request - 720 x 540 (preferred csp: Planar YV12)
VDec: using Planar YV12 as output csp (no 3)
Movie-Aspect is undefined - no prescaling applied.
videocodec: libavcodec (720x540 fourcc=58564944 [DIVX])
High quality encoding selected (non real time)!
Pos:   0.9s     22f ( 0%)   8fps Trem:   5min  42mb  A-V:0.000 [0:64]
Skipping frame!
Pos:   1.3s     33f ( 1%)   9fps Trem:   5min  33mb  A-V:0.000 [2416:64]
Skipping frame!
Pos: 119.7s   3001f (99%)   9fps Trem:   0min  15mb  A-V:0.000 [998:64]]
Writing AVI index...
Fixing AVI header...

Video stream:  998.197 kbit/s  (124774 bps)  size: 14938022 bytes 
119.720 secs  3001 frames

Audio stream:   64.000 kbit/s  (8000 bps)  size: 963814 bytes  120.477 secs
PSNR: Y:36.41, Cb:43.88, Cr:43.81, All:37.79

==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
mjpeg: using external huffman table
Selected video codec: [ffmjpeg] vfm:ffmpeg (FFmpeg MJPEG decoder)
==========================================================================
audiocodec: framecopy (format=55 chans=1 rate=44100 bits=0 bps=8000 
sample=1)
Writing AVI header...
mjpeg comment: 'FFmpeg0.4.6b4654'
VDec: vo config request - 720 x 540 (preferred csp: Planar YV12)
VDec: using Planar YV12 as output csp (no 3)
Movie-Aspect is undefined - no prescaling applied.
videocodec: libavcodec (720x540 fourcc=58564944 [DIVX])
High quality encoding selected (non real time)!
Pos:   0.9s     22f ( 0%)   9fps Trem:   5min  16mb  A-V:0.000 [0:64]
Skipping frame!
Pos:   1.3s     33f ( 1%)   9fps Trem:   5min  16mb  A-V:0.000 [1112:64]
Skipping frame!
Pos: 119.7s   3001f (99%)   9fps Trem:   0min  15mb  A-V:0.000 [987:64]]
Writing AVI index...
Fixing AVI header...

Video stream:  987.710 kbit/s  (123463 bps)  size: 14781078 bytes 
119.720 secs  3001 frames

Audio stream:   64.000 kbit/s  (8000 bps)  size: 963814 bytes  120.477 secs
PSNR: Y:36.30, Cb:43.86, Cr:43.78, All:37.69

See what I mean?

- -- 
- ------------------------------------------------------------------------
begin  GPG D694 FB76 12FC 94A7 4557  9951 8734 A4AC 7AA4 141E
Ian Smith
Worst . . . signature . . . ever !

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.1 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQE+TpZhhzSkrHqkFB4RAtZXAKDmPRUrjK/oQ0NZ9XqgOHN8HgXf4gCg0iuf
rW0a3VK84Lb+d0DsklPTiE8=
=0nij
-----END PGP SIGNATURE-----