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Old 8th November 2005, 14:00   #41  |  Link
FredThompson
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Quote:
Originally Posted by dragongodz
FredThompson - if you are making that sample available for download by hank315 then can you let me know where to get it aswell ? as i would like to test and see what it does with QuEnc.
Yes. I just sent a message to hank315 that I can't get to it until Friday due to a packed business schedule. I'll make it openly available. It's probably a good stress test for encoders.
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Old 8th November 2005, 22:34   #42  |  Link
hank315
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@Sagittaire
Quote:
adaptative Bframe number is compliant with DVD MP@ML ... ???
IPPPBPBBPBBPPP for example ... ???
I think everybody agrees that CCE generates DVD compliant streams.
3 consecutive GOPs from the CCE encoding (from your blind test) look like:
IBPBPBPBPBPBPB-IBBPPBPBPBBPBB-IBBPBBPBBPPPBB

That doesn't look like the (default) IBBPBBPBBPBB... scheme you probably set in CCE
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Old 16th November 2005, 19:25   #43  |  Link
hank315
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Some news about HC016.

I wanted to release it also with an updated GUI version but the old GUI isn't flexible enough,
it's too big, just can't fit the new buttons in it anymore (and it's ugly also )
So there will be a completely new GUI but that will take some time to finish...

But thanks to all comments/feedback the HC016batch version is now final:

http://hank315.dyndns.org/HCbatch_016.zip

- fixes the playback on some strict players (Pioneer)
- pulldown issue is fixed, streams can be pulldowned for PAL and NTSC GOP lengths
- updated 1 pass CQ_MAXBITRATE run, should result in better prediction
- autoq2 matrix replaced with avamat6 and avamat7 (both by Amnon82)

Some of this is already in the latest test releases but not all.
For those who use DBD-RB with HC, just replace and rename the exe file with this one.
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Old 16th November 2005, 20:30   #44  |  Link
bourtzovlakas
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Old 16th November 2005, 20:52   #45  |  Link
Lo_RaT_PeNaT
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many thank you for your work
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Old 16th November 2005, 20:58   #46  |  Link
DK
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good news!
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Old 16th November 2005, 21:59   #47  |  Link
Oldeman
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Great.....
I love HC... Thanks thanks thanks.... Hank315 .
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Old 16th November 2005, 22:07   #48  |  Link
kumi
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Thank you so much hank315
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Old 17th November 2005, 06:26   #49  |  Link
hartford
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Thankyou hank315.

I've used this on low bitrate MPEG2's and it is much better than CCE 2.50.

Can't say more than thankyou!
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Old 17th November 2005, 14:00   #50  |  Link
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a big thanks isn't enought !

BHH
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Old 17th November 2005, 14:28   #51  |  Link
raquete
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Quote:
Originally Posted by hartford
Thankyou hank315.

I've used this on low bitrate MPEG2's and it is much better than CCE 2.50.
yes, i can trust. i saw cool screenshots in digital-digest a few minutes.
(the link to the forum seems down,sorry)

Thank you hank315!


[edit] the link is working now: Screenshots - HC 016 FINAL (impressive!)

Last edited by raquete; 17th November 2005 at 14:51.
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Old 17th November 2005, 17:33   #52  |  Link
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@hank315

WOW! Thank you, man!

Cya!!
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Old 17th November 2005, 20:13   #53  |  Link
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I must add my thank yous here also. I had a difficult time with certain anime sources. CCE produced a whole GOP of huge blocks in a particular vertical pan scene and lesser blocks in many other pans. HC does not seem to have any problems with these scenes Settings for bitrate min/ave/max is 500/2060/2450. Other settings were more or less default. In conclusion (pointed by some others already), for lower bitrates HC beats CCE easily.

EDIT:
I have another weird pan scene where 15A gives clearly better results than 16 (still major blocking, but better overall). If anyone's interested I'll put the m2v's etc up somewhere (around 1,8MB each).

Last edited by zsb; 17th November 2005 at 20:57.
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Old 17th November 2005, 23:35   #54  |  Link
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Quote:
Originally Posted by Boulder
It appears that HC doesn't like ffdshow's mjpeg decoding.

I've got a TV capture, captured with ffdshow mjpeg. I open it via AVISource so the infamous DirectShowSource can't be the culprit. When the script is opened, HC quits almost immediately leaving a zero byte length m2v file behind.

EDIT: using DirectShowSource it works
I just wanted to ask, if there is some kind of bugfix planned to the above problem, because I found out that I have the same crash with captures in ffdshows MJPEG. Using DirectshowSource instead of AviSource helps to encode anyway, but funny enough, with HCbatch_015 it is possible to open the capture-file via AviSource. It would be nice, if there was a solution to this (maybe in the next release... )...

Once more a BIG THANX for this great encoder, it is really my favourite! Keep up the good work!
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Old 18th November 2005, 23:26   #55  |  Link
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@Hank315

Thanks for the new version.

However, there is one problem that I ecountered.

I encoded my file at 2300KBPS with AVAMAT7 and it turned out looking great. But it also turned out slightly undersized. So I ran it through Bitrateviewer and it reported that the file was 2153KBPS. Thats about a 7% decrease in quality.

Could this be the fault of AVAMAT7? If so, what would be a better matrix to use.

Here are my settings:

HC16 -i mysource -o myvideo -b 2300 maxbitrate 9000 -profile best -aspectratio 4:3 -scene -nointerlace -matrix avamat7

The source is about 600-700 MB's, so I could upload it to www.yousendit.com and e-mail the link to you. PM your address if your interested.

Thanks.

EDIT
My Source is also B&W. Could the lack of chroma affect how HCEnc calculates bitrate?

Last edited by Revgen; 18th November 2005 at 23:32.
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Old 19th November 2005, 00:53   #56  |  Link
pacohaas
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Quote:
Originally Posted by hank315
Some news about HC016.
- updated 1 pass CQ_MAXBITRATE run, should result in better prediction
I've been testing HC, specifically interested in using the CQ mode to create constant quality SVCD encodes. The obvious shortcoming here is that with a max bitrate, CQ mode will tend to scale down the more difficult frames, while not scaling the easier low motion frames. I'd be down with a 2-pass CQ mode where Q stood for quality rather than Quantizer and all the quantizers appropriately scaled based on first pass info to achieve constant quality.

If you're up for it, I'm up for test encoding and reporting.
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Old 19th November 2005, 15:01   #57  |  Link
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VBV Buffer underflow

I have just tried the final HC016 and one of my encodings which is about 5 mins playing time in length has 9 VBV underflows in the log file.

What is a VBV underflow and should I be concerned about it?

I'm using AVAMAT6 matrix, max bitrate of 8000 and average bitrate of 4700.

Since posting the above, I've also got another approx 5 min encoding with the same settings except average bitrate is set to 4900 and there are 27 VBV underflows.

Last edited by colinb; 19th November 2005 at 15:43.
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Old 19th November 2005, 20:52   #58  |  Link
pacohaas
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Quote:
Originally Posted by colinb
What is a VBV underflow and should I be concerned about it?
I was kinda wondering the same thing myself, here's what a 20 second google found me. Mine always says zero, so i assume this has something to do with higher DVD bitrates since i'm only doing SVCD's.
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Old 20th November 2005, 00:26   #59  |  Link
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WOW Hank.... nice job
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Old 20th November 2005, 00:29   #60  |  Link
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ok let me see if i can explain it really simply.

imagine a bucket with a hole in the bottom, this is the buffer. now imagine you have a lot of different size glasses filled with water, these are the video frames. now as you empty 1 glass at a time in to the bucket so much runs out the hole. the bucket wil be filled to different amount at different times because the glasses of water are different sizes. now if too many really big glasses are poured in before enough water drains from the hole water will run over the sides and you lose that water.this is a buffer underflow. its when the outflow of the buffer is under the amount needed to handle the amount of data being fed to it. a buffer overflow is of course the opposite. that is when the bucket gets empty and is waiting for a glass of water to be poured in.

what does a decoder do in these situations ? it can wait until you pour that glass if you dont want lose any or discard it as too big etc for an underflow. thats up to how the decoder was done. either way you lose totally smooth playback.

i hope i made that simple enough.

the only time you need to worry with HC is if it doesnt or can not fix an underflow. so if you see it say x amount of underflows fixed then you dont really need to worry it.

Quote:
i assume this has something to do with higher DVD bitrates since i'm only doing SVCD's.
no its applicable for SVCD aswell.
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