MJPEG Encoder Research, no questions here

[Martin Koch]

Downloaded an original 720p MJPEG clip from vimeo (clip 12515307) with the following settings:

Quality settings (E1 to E4) - 352, 220, 200, 184
Table settings (E1 to E4) - 24, 24, 24, 24

MediaInfo says 54.5 Mbps

JPEGsnoop 1.2.0 by Calvin Hass
  www.impulseadventure.com/photo/
  -------------------------------

  Filename: [C:\WINDOWS\Desktop\tester13\720p MJPEG.mov]
  Filesize: [292424830] Bytes

Start Offset: 0x00007F00
*** Marker: SOI (xFFD8) ***
  OFFSET: 0x00007F00
 
*** Marker: DQT (xFFDB) ***
  Define a Quantization Table.
  OFFSET: 0x00007F02
  Table length = 132
  ----
  Precision=8 bits
  Destination ID=0 (Luminance)
    DQT, Row #0:   2   2   2   2   5   4   9   9 
    DQT, Row #1:   2   2   2   2   4   7   9   9 
    DQT, Row #2:   2   2   4   4   4   7  12  11 
    DQT, Row #3:   2   4   4   5   9  11  16  16 
    DQT, Row #4:   2   4   5   9  11  12   9  18 
    DQT, Row #5:   7   5   9  11  12  16  12  16 
    DQT, Row #6:   4  11  14  12  16  18  16  14 
    DQT, Row #7:  11  12  14  14  18  18  16  16 
    Approx quality factor = 92.07 (scaling=15.85 variance=15.32)
  ----
  Precision=8 bits
  Destination ID=1 (Chrominance)
    DQT, Row #0:   4   2   4   4  16  16  16  16 
    DQT, Row #1:   4   4   7   9  16  16  16  16 
    DQT, Row #2:   4   7  11  16  16  16  16  16 
    DQT, Row #3:   4  16  16  16  16  16  16  16 
    DQT, Row #4:  11  16  16  16  16  16  16  16 
    DQT, Row #5:  16  16  16  16  16  16  16  16 
    DQT, Row #6:  16  16  16  16  16  16  16  16 
    DQT, Row #7:  16  16  16  16  16  16  16  16 
    Approx quality factor = 91.74 (scaling=16.51 variance=8.99)
 
*** Marker: SOF0 (Baseline DCT) (xFFC0) ***
  OFFSET: 0x00007F88
  Frame header length = 17
  Precision = 8
  Number of Lines = 720
  Samples per Line = 1280
  Image Size = 1280 x 720
  Raw Image Orientation = Landscape
  Number of Img components = 3
    Component[1]: ID=0x01, Samp Fac=0x22 (Subsamp 1 x 1), Quant Tbl Sel=0x00 (Lum: Y)
    Component[2]: ID=0x02, Samp Fac=0x11 (Subsamp 2 x 2), Quant Tbl Sel=0x01 (Chrom: Cb)
    Component[3]: ID=0x03, Samp Fac=0x11 (Subsamp 2 x 2), Quant Tbl Sel=0x01 (Chrom: Cr)

[vladszp]

http://www.dpreview.co.uk/maint/prin...kond2x&page=13
anything beyond quality factor 90 is just a waste of bitrate....
http://www.impulseadventure.com/phot...lity_irfan.gif
the big one...

[Vitaliy Kiselev]

http://www.dpreview.co.uk/maint/prin...kond2x&page=13
anything beyond quality factor 90 is just a waste of bitrate....
http://www.impulseadventure.com/phot...lity_irfan.gif
the big one...

OK, and how this relate to MJPEG encoder research?
Quality factor is just subjective number made from Q table.
Any Q table is used to remove some DCT info.
So, it is never waste of space.
If anyone shoots highly detailed nature scenes even very high quality JPEG images can show artefacts.

[Grunf]

Hello!

I just noticed one thing you might find interesting: entry "MJPEG Encoder 30fps->Xfps" is somehow affecting AVCHD recording as well.

I use AVCHD Bitrate "C" settings and it works perfectly in 1080p25 ("Native 24/25p" enabled). But as soon as I enable "MJPEG Encoder 30fps->Xfps" with "25" as entry (I live in PAL country), I get problems with AVCHD and camera stops recording after couple of seconds. MJPEG recording works (MJPEG bitrate was tuned to "manageable" levels I know camera would support, like 60Mbit or so) but it's able to record only couple of seconds at the time. It will record for longer time but as soon as I stop recording, it will hang for 10 secs and then ask me to reboot the camera by switching on/off.

Keeping "MJPEG Encoder 30fps->Xfps" unchecked will let AVCHD work. Checking it will make AVCHD fail with same bitrate.

Hypotesis: "MJPEG Encoder 30fps->Xfps" set to 25 seems to be affecting more than MJPEG.

[cbrandin]

I think you're on to something. If I set both the 30fps->24fps, and the 30fps->Xfps to 24, and nothing else, StreamEye displays the video on a split screen with squashed versions of the clip on the top and bottom of the screen. Windows Media Player, however, shows it correctly. Obviously something changed that StreamEyE deals with differently than Media Player.

Chris

[Martin Koch]

All tests are made with
GH1 + 20 mm 1.7 pancake in M and manual focus mode
Shutter 1/50, Arperture f5.0, ISO 100
STANDARD -2, -2, -2, -2
Card: 16 GB Sandisk Extreme Class 10 card

JPEGSnoop doesn’t work reliable with alalyzing the GH1 MJPEG files so the 1280 x 720 JPEG thumbnail that accompanies any movie file was analyzed. As Vitaliy already said those thumbnails have the very same compression quality applied as the movie file. The only lossy process in (M)JPEG compression is the quantisation step after the Discrete Cosinus Transformation (DCT). Low values in the 8 x 8 Quantisation Tables result in higher image quality. A low detail scene and a high detail scene was recorded for each setting and the JPEGSnoop quality factor as well as the bitrate was noted.



Setting quality only

QUESTION: Does setting quality alone affect quantisation table?
ANSWER: No

FACTORY SETTINGS Firmware 1.32
Q: Factory (128, 110, 100, 92)
T: Factory (133, 146, 150, 155)
Low detailed scene: 83.09
High detailed scene: Only 19.16 !!!
Playback in camera: YES

REVERSED quality settings Firmware 1.33
Q: 92, 100, 110, 128
T: Factory (133, 146, 150, 155)
Low detailed scene: 83.09
High detailed scene: 19.16
Playback in camera: YES

EQUAL quality settings Firmware 1.34
Q: 128, 128, 128, 128
T: Factory (133, 146, 150, 155)
Low detailed scene: 83.09
High detailed scene: 19.16
Playback in camera: YES

CONCLUSION
Setting Quality alone has no effect on quantisation table used
Camera chooses very high compression for high detailed scenes.
GH1 uses a variable MJPEG compression to avoid too high bitrates on high detailed scenes. Low detailed scene scenes are less compressed. High detailed scene ones more.

Setting table only

QUESTION: Do table settings affect quantisation table?
ANSWER: Absolutely

FACTORY SETTINGS Firmware 1.32
Q: Factory (128, 110, 100, 92)
T: Factory (133, 146, 150, 155)
Low detailed scene: 83.09 / 8 mbps
High detailed scene: only 19.16 !!! / 37 mbps
Playback in camera: YES
Note: Very high compression on high detailed scene to bring data rate down to 37 mbps. 

REVERSED TABLE FACTORY SETTINGS Firmware 1.35
Q: Factory (128, 110, 100, 92)
T: 155, 150, 146, 133
Low detailed scene: 80.06
High detailed scene: 19.16 
Playback in camera: YES
Note: no effect

EQUAL TABLE SETTINGS Firmware 1.36
Q: Factory (128, 110, 100, 92)
T: 133, 133, 133, 133
Low detailed scene: 83.09 / 0.6 mbps
High detailed scene: 19.16 / 35.7 mbps
Playback in camera: YES
Note: no effect

LOW TABLE SETTINGS Firmware 1.37
Q: Factory (128, 110, 100, 92)
T: 24, 24, 24, 24
Low detailed scene: 97.33 / 28 mbps !!!
High detailed scene: 19.16 / 35.7 mbps
Playback in camera: YES
Note: Only compression of low detail scene  is improved

LOWEST TABLE SETTINGS Firmware 1.38
Q: Factory (128, 110, 100, 92)
T: 0, 0, 0, 0
Low detailed scene: 100!!! / 62 mbps / Movie OK
High detailed scene: 100!!! / 63 mbps / Movie is black!!!
Playback in camera: NO!!!
Note: “Lossless”, Luma and Chroma quantisation tables are filled with the number one

2,2,2,2 TABLE SETTING Firmware 1.39
Q: Factory (128, 110, 100, 92)
T: 2, 2, 2, 2
Low detailed scene: 100!!! / 60 mbps  / Movie OK
High detailed scene: 79 / 63 mbps  / Movie is black
Playback in camera: NO
Note: Camera starts to increase compression on high detailed scene. 

4,4,4,4 TABLE SETTING Firmware 1.40
Q: Factory (128, 110, 100, 92)
T: 4, 4, 4, 4
Low detailed scene: 98 / 52 mbps  / Movie OK
High detailed scene: 56 / 63 mbps  / Movie OK
Playback in camera: NO
Note: Even more compression on high detailed scene

5,5,5,5 TABLE SETTING Firmware 1.41
Q: Factory (128, 110, 100, 92)
T: 5, 5, 5, 5
Low detailed scene: 98 / 37 mbps  / Movie OK
High detailed scene: 45 / 56 mbps  / Movie OK
Playback in camera: LOW: YES, HIGH: NO
Note: max. clip length with this settings: 7 minutes - 2 GB

CONCLUSION
Table settings have direct influence on the quantisation table used. With 5,5,5,5 low detailed scene compression quality is very good (98). For high detailed scenes the camera still chokes the bitrate by choosing a lower quality quantisation table but quality improves from 19 - 37 mbps to 45 - 56 mbps.
Only low detail scenes play back in camera. There seems to be a limit around 37 mbps with my card. Clips below this limit play back fine.

Setting quality and table

QUESTION: Is the quality settings sequence “128,110,100,92” the bitrate choke?
ANSWER: It seems so. Doubling the values makes the bitrate choke less aggressive and allows lower compression of high detailed scenes

NO CHOKE? QUALITY SETTING Firmware 1.42
Q: 128, 128, 128, 128
T: 5, 5, 5, 5
Low detailed scene: 98 / 37 mbps  / Movie OK
High detailed scene: 44 / 56 mbps  / Movie OK
Playback in camera: NO
Note: Fail. Has no effect on quantisation table chosen

DOUBLED QUALITY / T5 SETTING Firmware 1.43
Q: 256, 220, 200, 184
T: 5, 5, 5, 5
Low detailed scene: 100!!! / 61!!! mbps  / Movie OK
High detailed scene: 86!!! / 88!!! mbps  / Movie OK
Playback in camera: NO
4:2:0 chroma subsampling
Note: Excellent low detail and better high detail compression

4:2:2 + DOUBLED Q / T5 SETTING Firmware 1.44
Q: 256, 220, 200, 184
T: 5, 5, 5, 5
Low detailed scene: 100 / 67 mbps  / Movie OK
High detailed scene: 82 / 77 mbps  / Movie OK
4:2:2 chroma subsampling
Playback in camera: NO
Note: Not much difference. Camera seems to record fine.
max. Individual clip length with these settings: about 4 minutes - 2 GB 
16 GB card will store 32 minutes of footage.
Real live scenes show 92 / 70 mbps

PappasArts + 4:2:2 SETTING Firmware 1.46
Q: 384, 330, 300, 276
T: 24, 24, 24, 24
Low detailed scene: 97 / 34 mbps  / Movie OK
High detailed scene: 81 / 75 mbps  / Movie recording stopped after 3s!!!
4:2:2 chroma subsampling
Playback in camera: LOW: YES, HIGH: NO
Note: No improvement over DOUBLED Q / T5 SETTING plus camera failed to record high detailed secene after 3s.

4:2:2 + DOUBLED Q / T4 SETTING Firmware 1.47
Q: 256, 220, 200, 184
T: 4, 4,4, 4
Low detailed scene: 100 / 80 mbps  / Movie recording fails after a few seconds!
High detailed scene: 85 / 80 mbps  / Movie OK
4:2:2 chroma subsampling
Playback in camera: NO
Note: Fail

4:2:2 + 1.5 X Q / T4 SETTING Firmware 1.48
Q: 192, 165, 150, 138
T: 4, 4,4, 4
Low detailed scene: 100 / 55 mbps  / Movie OK
High detailed scene: 74 / 82 mbps  / Movie OK
4:2:2 chroma subsampling
Playback in camera: NO
Note: High detail better than with DOUBLED Q / T5
Real live scenes show 94 / 70 mbps

4:2:2 + 1.75 X Q / T4 SETTING Firmware 1.49
Q: 224, 192, 175, 161
T: 4, 4,4, 4
Low detailed scene: 100 / 72 mbps  / Movie OK
High detailed scene: 81 / 84 mbps  / Movie OK
4:2:2 chroma subsampling
Playback in camera: NO
Note: Similar to DOUBLED Q / T5 setting
Real live scenes show 85 - 97 quality

CONCLUSION
The table / quality relationship remains a mystery to me.
At the moment I use the 4:2:2 + 1.75 X Q / T4 SETTING without problems.

We would need a much better source image before the MJPEG compression to fully qualify such high compression quality settings. The video source image is quite soft and degraded because of the fast downsampling method (pixel binning?) used. The still photo source is much better downsampled.

[Vitaliy Kiselev]

I can only applaud to this testing work.

[Martin Koch]

More tests and still no clue.

4:2:2 + Paul Shields  SETTINGS Firmware 1.50
Q: 256, 256, 256, 256
T: 5, 5, 5, 5
Low detailed scene: 100 / 89 mbps  / Movie OK
High detailed scene: 82 / 100!!! mbps  / Movie recording failed after a few seconds
4:2:2 chroma subsampling
Playback in camera: NO
Note: 

4:2:2 + 128 / 5  SETTING Firmware 1.52
Q: 128, 128, 128, 128
T: 5, 5, 5, 5
Low detailed scene: 95 / 28 mbps  / Movie OK 
High detailed scene: 36 / 52 mbps  / Movie OK
4:2:2 chroma subsampling
Playback in camera: LOW: YES, HIGH: NO
Note: Bitrate choke is still active and seems to be implemented somewhere else

4:2:2 + 0 / 5  SETTING Firmware 1.53
Q: 0, 0, 0, 0
T: 5, 5, 5, 5
Camera refuses to record. Corrupted movie files on card. No thumbnail files
Note: Display shows 29 min 59 sec recording time (European PAL Limit)

4:2:2 + 10 / 5  SETTING Firmware 1.54
Q: 10, 10, 10, 10
T: 5, 5, 5, 5
Low detailed scene: 19 / 0.5 mbps  / Movie OK BUT VERY LOW QUALITY
High detailed scene: 19 / 0.5 mbps  / Movie is BLACK!!!
4:2:2 chroma subsampling
Playback in camera: LOW: YES, HIGH: NO
Note: Display shows 29 min 59 sec recording time 

4:2:2 + 256, 256, 220, 200 / 5  SETTING Firmware 1.55
Q: 256, 256, 220, 200
T: 5, 5, 5, 5
Low detailed scene: 100 / 83 mbps  / Movie OK
High detailed scene: 82 / 85 mbps  / Movie OK
4:2:2 chroma subsampling
Playback in camera: NO
Note: Display shows about 4 min recording time 

4:2:2 + 256, 256, 256, 220 / 5  SETTING Firmware 1.56
Q: 256, 256, 256, 220
T: 5, 5, 5, 5
Low detailed scene: 100 / 85 mbps  / Movie recording failed after a few seconds
High detailed scene: 82 / 85 mbps  / Movie recording failed after a few seconds
4:2:2 chroma subsampling
Playback in camera: NO
Note: Same tables but Movie recording failes after a few seconds

4:2:2 + 200 / 5  SETTING Firmware 1.57
Q: 200, 200, 200, 200
T: 5, 5, 5, 5
Low detailed scene: 98.15 / 56 mbps  / Movie OK
High detailed scene: “only” 69 / 77 mbps  / Movie OK
4:2:2 chroma subsampling
Playback in camera: NO
Note: Display shows about 5 min clip recording time
Should be a very stable setting


4:2:2 + 215 / 5  SETTING Firmware 1.58
Q: 215, 215, 215, 215
T: 5, 5, 5, 5
Low detailed scene: 98.32 / 77 mbps  / Movie OK
High detailed scene: 74 / 83 mbps  / Movie OK
4:2:2 chroma subsampling
Playback in camera: NO
Note: Display shows about 5 min clip recording time
Quantisation table of low detailed scene is filled with “Ones” and “Twos”
Quality 74 is nice for high detailed scenes

The last 4:2:2 + 215 / 5 SETTING should be a very stable setting for any Class 10 card
Tested with Film mode Smooth -2 -2 -2 -2, continuous autofocus (AFC) and 1/50 shutter speed. No problems. Real life scenes are around 70 mbps
To me this 720p MJPEG looks as good as 720p50 with "c" settings.

[modulr]

I understand this thread is aggressively moderated, but I wanted to post some findings that you may or may not find useful. I was unsure if testers really sift thru the noise on the main hack forum, so I'm providing a repost. Jpegsnoop is suggesting very high quality results.

Observations...

T = 1, resulting jpeg is roughly 1/4 complete.
T = 2, resulting jpeg is roughly 1/2 complete
T = 3, restulting jpeg is roughly 3/4 complete

As previously noted, using any tables 0-3 result in a quicktime which is black on playback. So obviously, T = 4 is the lowest setting that provides a completed and valid jpeg + mov. Might T have something to do with how the image is scanned? Anyway, I used this as my base point, as low T values always seem to perform well.

My initial goal was to figure out what quality settings could provide continuous playback on a Sandisk 8GB Extreme Class 10.

Q1=188, T1=4
Q2=188, T2=4
Q3=188, T3=4
Q4=188, T4=4

This resuted in recording of the star chart and real world examples with no errors at 75+mbps for complex scenes. There was still a fair degree of compression though, so I began to think about the logic of the system.

Q=188, T=4 for all stages 1-4 suggests the codec is always operating against the same threshold when dealing with it's variable bit rate. It suggests that for complex scenes, this is the max is can handle (on my card), however it leaves less complex scenes wanted more bits thrown at it. Odds are, the codec is constantly trying to get the most bits in there until there is a overflow and it must test the next lower Q level.

So what if we up the thresholds on Q1-Q3, and let Q4 be our last line of defense?

I came up with these settings...

Q1=400, T1 = 4
Q2=300, T2 = 4
Q3=250, T3 = 4
Q4=188, T3 = 4

The idea was to keep the thresholds very high (and throw more at simpler scenes), but if necessary back them down to the maximum my card could handle when a scene gets too complex. It seems like the codec is always trying to keep the threshold as high as possible.

Sorry for the lack of wonderful shots with flowers in bloom. It was gloomy outside morning, however I've tested these setting with complex natural scenes as well. Thus far, it's been working flawless.

Nostalgic Film Mode: Contrast -2, Sharpness -2, Saturation 0, Noise Reduction 0



----------

Precision=8 bits
Destination ID=0 (Luminance)
DQT, Row #0: 1 1 1 1 1 1 1 1
DQT, Row #1: 1 1 1 1 1 1 1 1
DQT, Row #2: 1 1 1 1 1 1 1 1
DQT, Row #3: 1 1 1 1 1 1 1 1
DQT, Row #4: 1 1 1 1 1 1 1 1
DQT, Row #5: 1 1 1 1 1 1 1 1
DQT, Row #6: 1 1 1 1 1 1 1 1
DQT, Row #7: 1 1 1 1 1 1 1 1
Approx quality factor = 100.00 (scaling=2.99 variance=6.13)
----
Precision=8 bits
Destination ID=1 (Chrominance)
DQT, Row #0: 1 1 1 1 1 1 1 1
DQT, Row #1: 1 1 1 1 1 1 1 1
DQT, Row #2: 1 1 1 1 1 1 1 1
DQT, Row #3: 1 1 1 1 1 1 1 1
DQT, Row #4: 1 1 1 1 1 1 1 1
DQT, Row #5: 1 1 1 1 1 1 1 1
DQT, Row #6: 1 1 1 1 1 1 1 1
DQT, Row #7: 1 1 1 1 1 1 1 1
Approx quality factor = 100.00 (scaling=1.54 variance=1.58)

Compression stats:
Compression Ratio: 5.13:1
Bits per pixel: 4.68:1





----------

Precision=8 bits
Destination ID=0 (Luminance)
DQT, Row #0: 1 1 1 1 1 1 1 1
DQT, Row #1: 1 1 1 1 1 1 1 1
DQT, Row #2: 1 1 1 1 1 1 2 2
DQT, Row #3: 1 1 1 1 1 2 2 2
DQT, Row #4: 1 1 1 1 2 2 1 3
DQT, Row #5: 1 1 1 2 2 2 2 2
DQT, Row #6: 1 2 2 2 2 3 2 2
DQT, Row #7: 2 2 2 2 3 3 2 2
Approx quality factor = 98.22 (scaling=3.57 variance=4.57)
----
Precision=8 bits
Destination ID=1 (Chrominance)
DQT, Row #0: 1 1 1 1 2 2 2 2
DQT, Row #1: 1 1 1 1 2 2 2 2
DQT, Row #2: 1 1 2 2 2 2 2 2
DQT, Row #3: 1 2 2 2 2 2 2 2
DQT, Row #4: 2 2 2 2 2 2 2 2
DQT, Row #5: 2 2 2 2 2 2 2 2
DQT, Row #6: 2 2 2 2 2 2 2 2
DQT, Row #7: 2 2 2 2 2 2 2 2
Approx quality factor = 98.80 (scaling=2.39 variance=0.91)

Compression stats:
Compression Ratio: 5.74:1
Bits per pixel: 4.18:1




----------

Precision=8 bits
Destination ID=0 (Luminance)
DQT, Row #0: 1 1 1 1 1 1 1 1
DQT, Row #1: 1 1 1 1 1 1 1 1
DQT, Row #2: 1 1 1 1 1 1 1 1
DQT, Row #3: 1 1 1 1 1 1 1 1
DQT, Row #4: 1 1 1 1 1 1 1 1
DQT, Row #5: 1 1 1 1 1 1 1 1
DQT, Row #6: 1 1 1 1 1 1 1 1
DQT, Row #7: 1 1 1 1 1 1 1 1
Approx quality factor = 100.00 (scaling=2.99 variance=6.13)
----
Precision=8 bits
Destination ID=1 (Chrominance)
DQT, Row #0: 1 1 1 1 1 1 1 1
DQT, Row #1: 1 1 1 1 1 1 1 1
DQT, Row #2: 1 1 1 1 1 1 1 1
DQT, Row #3: 1 1 1 1 1 1 1 1
DQT, Row #4: 1 1 1 1 1 1 1 1
DQT, Row #5: 1 1 1 1 1 1 1 1
DQT, Row #6: 1 1 1 1 1 1 1 1
DQT, Row #7: 1 1 1 1 1 1 1 1
Approx quality factor = 100.00 (scaling=1.54 variance=1.58)

Compression stats:
Compression Ratio: 5.93:1
Bits per pixel: 4.05:1




----------

Precision=8 bits
Destination ID=0 (Luminance)
DQT, Row #0: 1 1 1 1 1 1 1 1
DQT, Row #1: 1 1 1 1 1 1 1 1
DQT, Row #2: 1 1 1 1 1 1 1 1
DQT, Row #3: 1 1 1 1 1 1 1 1
DQT, Row #4: 1 1 1 1 1 1 1 1
DQT, Row #5: 1 1 1 1 1 1 1 1
DQT, Row #6: 1 1 1 1 1 1 1 1
DQT, Row #7: 1 1 1 1 1 1 1 1
Approx quality factor = 100.00 (scaling=2.99 variance=6.13)
----
Precision=8 bits
Destination ID=1 (Chrominance)
DQT, Row #0: 1 1 1 1 1 1 1 1
DQT, Row #1: 1 1 1 1 1 1 1 1
DQT, Row #2: 1 1 1 1 1 1 1 1
DQT, Row #3: 1 1 1 1 1 1 1 1
DQT, Row #4: 1 1 1 1 1 1 1 1
DQT, Row #5: 1 1 1 1 1 1 1 1
DQT, Row #6: 1 1 1 1 1 1 1 1
DQT, Row #7: 1 1 1 1 1 1 1 1
Approx quality factor = 100.00 (scaling=1.54 variance=1.58)

Compression stats:
Compression Ratio: 5.24:1
Bits per pixel: 4.58:1




----------

Precision=8 bits
Destination ID=0 (Luminance)
DQT, Row #0: 1 1 1 1 1 1 1 1
DQT, Row #1: 1 1 1 1 1 1 1 1
DQT, Row #2: 1 1 1 1 1 1 1 1
DQT, Row #3: 1 1 1 1 1 1 1 1
DQT, Row #4: 1 1 1 1 1 1 1 1
DQT, Row #5: 1 1 1 1 1 1 1 1
DQT, Row #6: 1 1 1 1 1 1 1 1
DQT, Row #7: 1 1 1 1 1 1 1 1
Approx quality factor = 100.00 (scaling=2.99 variance=6.13)
----
Precision=8 bits
Destination ID=1 (Chrominance)
DQT, Row #0: 1 1 1 1 1 1 1 1
DQT, Row #1: 1 1 1 1 1 1 1 1
DQT, Row #2: 1 1 1 1 1 1 1 1
DQT, Row #3: 1 1 1 1 1 1 1 1
DQT, Row #4: 1 1 1 1 1 1 1 1
DQT, Row #5: 1 1 1 1 1 1 1 1
DQT, Row #6: 1 1 1 1 1 1 1 1
DQT, Row #7: 1 1 1 1 1 1 1 1
Approx quality factor = 100.00 (scaling=1.54 variance=1.58)

Compression stats:
Compression Ratio: 8.01:1
Bits per pixel: 3.00:1

[Martin Koch]

FACTORY SETTINGS
Q: 128, 110, 100, 92
T: 133, 146, 150, 155
Low detailed scene: 83.09 / 0.6 mbps / PLAYBACK OK / MOVIE OK
High detailed scene: 19.16 / 36.15 mbps / PLAYBACK OK / MOVIE OK
4:2:0
Clip recording time display: 8m 20s


CUT AFTER E1
Q: 128, 110, 100, 92
T: 133, 146, 150, 155
Low detailed scene: 83.09 / 0.6 mbps / PLAYBACK OK / MOVIE OK
High detailed scene: 19.16 / 37.12 mbps / PLAYBACK OK / MOVIE OK
4:2:0
Clip recording time display: 8m 20s

Cut after E1 doesn't seem to have an effect.