Jerky F4V playback in IE -- Firefox seems OK.

Question

Seen multiple threads for “jerky playback in flash”, but nothing posted seems to help.
I’ve tried in the Flash forum, but No Joy.
6 different videos – all with same results all using Adobe presets.
Using the F4v/FLV .5 Mbs export preset from PP to media encoder
All F4V/FLV exports show “jerky” playback in flash/IE, but fine in FireFox  (so sounds like a Flash player or IE issue –right, but this is one of the largest combos on the net, so I figure someone has gotten this to work).
Audio is OK.
Same behavior on 2 different systems (Win7 x64 with lots of RAM and good CPU)
Systems all have latest updates, etc, etc. CPU/memory is low usage.
Hardware and systems are high-end and well-tuned.
Using VBR 1pass and CBR target in the 0.50 Mbs range.
Have used a variety of export presets in the 0.4 to 1.5 Mbs – all with same results.  So my test set exceeds 20 exports – all with identical behavior.
Internet connection is 20Mbs to desktop.
Locally-hosted F4Vs play OK.
Hosted MOVs are downloaded and play very well.
Same behavior on 2 separate hosted ISPs for all videos.  Non-dedicated flash servers.
Uninstalled/reinstalled Flash.  Hardware acceleration on/off, AVP on/off, etc.
Any suggestions?
If folks are having success with flash, can you provide export settings in the 0.5 to 1.x Mbs range that work for you?
Since I have seen lots of “jerky” playback posts associated with Flash, is this some sort of “known issue”?
PP CS5, latest AME, latest Flash 10.x
Thanks, H

Answer 1

I have updated this post with more detailed information to hopefully get some help.
I have read multiple posts/threads on “jerky playback in flash”, but nothing posted seems to help my situation.  I have tried in the Flash and PP forums, but to date no responses.
6 different videos – all Encoded with AME and produce the same results all using the Adobe F4V (h.264 Flash) presets from PP.
Started with the F4V/Web presets (same as source at 29.97), and then adjusted the output size to reduce Mbps until I got something to work.  Tried all settings from about 1.5Mbps down to about 0.4 Mbps, but all showed the same result.
All AME encodes show “jerky” playback in flash/IE, but smooth in FireFox.  Audio is OK
The video plays smoothly for a second, then shudders for about 3 frames, then smooth, then shudders, etc.
Local playback on AMP looks fine, this bypasses the browser completely, so not really a valid test.  I have attached a MediaInfo for a sample encode below.  The HTTP code for playback is generated by DW and very simple, so I doubt it is that.
Same behavior on 2 different systems (Win7 x64).  Systems have latest updates, etc, etc. Hardware and systems are high-end and well-tuned.  CPU never exceeds 5% and memory never above 10%.
Have used a variety of export presets in the 0.4 to 1.5 Mbps – all with same results.  So my test set exceeds 20 exports – all with identical behavior.
Tried VBR 1pass and CBR.
Same behavior on 2 separate hosted ISPs and local playback. All with identical behavior, but local playback is less pronounced.  Dedicated UNIX servers with high-speed connections, but not flash servers. Internet connection is 50+Mbps to desktop – but again, local playback also shows the shuttering behavior, just not as much.
It sounds like a Flash player or IE issue, but this is one of the largest combos on the net today, so I figure someone has gotten this to work using AME.
Uninstalled/reinstalled Flash.  Hardware acceleration on/off, AVP on/off, etc.
Since I have seen so many “jerky” playback posts associated with Flash, is this some sort of “known issue”?  I know that millions use h.264/Flash and IE daily, so I must be doing something wrong.  I realize the difference between IE and Mozilla Flash, but I can’t reconcile what I am seeing to just IE.  This is not a minor playback difference, but dramatic on 2 well-tuned systems.
PP CS5, latest AME, latest Flash 10.x, etc
Does anyone have examples of h.264 Flash output that hosts OK in the 512x288 to 786x432 range on IE? Can you provide link to output and settings that got you there.
Thanks, H
General
Complete name                    : T:\VIDEO_Project_Exports\F4V432\Gaskin.f4v
Format                           : MPEG-4
Format profile                   : Adobe Flash
Codec ID                         : f4v
File size                        : 23.5 MiB
Duration                         : 3mn 30s
Overall bit rate                 : 934 Kbps
Encoded date                     : UTC 2010-11-20 15:52:46
Tagged date                      : UTC 2010-11-20 15:52:46
©TIM                             : 00;00;00;00
©TSC                             : 30000
©TSZ                             : 1001
Video
ID                               : 1
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : [email protected]
Format settings, CABAC           : Yes
Format settings, ReFrames        : 3 frames
Codec ID                         : avc1
Codec ID/Info                    : Advanced Video Coding
Duration                         : 3mn 30s
Bit rate mode                    : Constant
Bit rate                         : 850 Kbps
Width                            : 768 pixels
Height                           : 432 pixels
Display aspect ratio             : 16:9
Frame rate mode                  : Constant
Frame rate                       : 29.970 fps
Standard                         : NTSC
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.085
Stream size                      : 22.0 MiB (94%)
Title                            : MainConcept
Language                         : English
Encoded date                     : UTC 2010-11-20 15:52:46
Tagged date                      : UTC 2010-11-20 15:52:46
Audio
ID                               : 2
Format                           : AAC
Format/Info                      : Advanced Audio Codec
Format version                   : Version 4
Format profile                   : LC
Codec ID                         : 40
Duration                         : 3mn 30s
Bit rate mode                    : Constant
Bit rate                         : 48.0 Kbps
Channel(s)                       : 2 channels
Channel positions                : Front: L R
Sampling rate                    : 22.05 KHz
Stream size                      : 1.21 MiB (5%)
Language                         : English
Encoded date                     : UTC 2010-11-20 15:52:46
Tagged date                      : UTC 2010-11-20 15:52:46
Preset
Output: 762x432, same as source fps, de-interlaced, AAC+ Version 2, 48kps, 44.1kHz, Stereo, CBR, Target 0.85Mbs
Source: Sequence, Gaskin_HDV, 1440x1080(1.333), 29.97fps, Upper, 0;03;19, 48000Hz, Stereo