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AVCHD Format Discussion
Inexpensive High Definition H.264 encoding to DVD, Hard Disc or SD Card.


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Old August 10th, 2006, 08:49 AM   #2
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Samples look terrible, NOT terrific !!

Unfortunately google translation is very obscure.. Some friend of ours could translate this ??


http://www.watch.impress.co.jp/av/do...9/zooma268.htm

Seen on this site are some Pics taken from "1940*1080" videos.
Definition look terribel, look at the "waves" on the lake or the cat.

Hope its a bad sample, otherwise the encoder is really terrible...

There are also some "big" files which must be some video but i have no clue of what the m2ts mean, nor which player to use. VLC gets some Audio, but no Video
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Old August 10th, 2006, 09:06 AM   #3
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Not bad, but does anyone else see the motion looking a bit "juddery"?
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Old August 10th, 2006, 06:05 PM   #4
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Glad to see the first ever AVC-HD Clips.

They are very good. They show good resolution and colors BUT I hate these types of clips where the camera is on a tripod motionless! What is the point???

Wouldn't clips with movement make sense, as I want to see the artifacts of MPEG-4 and see how it copes with lots of moving data...
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Old August 10th, 2006, 07:39 PM   #5
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Quote:
Originally Posted by Pierre Barberis
Unfortunately google translation is very obscure.. Some friend of ours could translate this ??


http://www.watch.impress.co.jp/av/do...9/zooma268.htm

Seen on this site are some Pics taken from "1940*1080" videos.
Definition look terribel, look at the "waves" on the lake or the cat.

Hope its a bad sample, otherwise the encoder is really terrible...

There are also some "big" files which must be some video but i have no clue of what the m2ts mean, nor which player to use. VLC gets some Audio, but no Video
The JPEGs you saw had very high compression. I watched the .wmv samples and it almost blew me out of my seat!

I tried VLC but it's demuxer can't demux the stream properly, it's like all scrambled.

And this is what it says in the message window:
"ffmpeg warning: illegal short term buffer state detected
(h264@01337330)
ffmpeg debug: concealing 3060 DC, 3060 AC, 3060 MV errors
(h264@01337330)"

I was able to see the resolution, it was same as HDV: 1440x1080 @ 16:9

Update: The people who decoded the AVCHD used the Cyberlink PowerDVD 7 H.264/AVC Decoder.

Update #2: Got the decoder, but if you have a single-core processor the video might freeze midway, it's reccomended that you have a dual-core processor with HT.
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Last edited by Jack Zhang; August 10th, 2006 at 09:06 PM.
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Old August 20th, 2006, 05:39 AM   #6
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Quote:
Originally Posted by Hse Kha
Glad to see the first ever AVC-HD Clips.

They are very good. They show good resolution and colors BUT I hate these types of clips where the camera is on a tripod motionless! What is the point???

Wouldn't clips with movement make sense, as I want to see the artifacts of MPEG-4 and see how it copes with lots of moving data...
Just checked that by capturing a few frames using PowerDVD and oversaturating the pictures in Photoshop. Conclusion:

HQ+ mode = HDV

XP mode is equal or better than HDV
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Old August 24th, 2006, 10:15 AM   #7
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What decoder do I need to install to see the video?
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Old August 25th, 2006, 03:34 PM   #8
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CoreAVC is the best.
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Old August 25th, 2006, 03:50 PM   #9
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I tried PowerDVD. Works pretty good but my comp's not a dual-core so I can't watch it at 60i.

Quote:
CoreAVC is the best.
Yes, but it costs you a bit.

I hope that the next release of VLC may be able to play AVCHD.
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Old August 26th, 2006, 10:56 AM   #10
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Jack,

You will NEVER see 60i on your computer screen - it's progressive!

Don't blame the codec for everything. The problems I see discussed here are partially due to conversion to progressive and de-interlacing. Everyone seems to think 1080i is the same as 1080p. It is not! It is impossible to derive an uncompromised still from an interlaced image (unless it is derived from low frame rate film, which insures no motion between field one and field two). The only way to see interlaced video properly is on an interlaced CRT, and they're disappearing fast!

Sony has always made superior cameras. I just can't help but think that the marketing people at Sony trumped the engineers by pointing out the superior marketing clout of the number 1080, while ignoring the "i" that follows. But maybe they were right!

Same raw data rate: 1080i30(60 fields) or 720p60 or 1080p30.

Twice the above data rate: 1080p60.

Since video will be compressed for delivery to the viewer. it makes sense to me not to push resolution to the extreme, thus requiring MORE compression. Maybe someday we can "have it all" (1080p60) on blue laser discs, but broadcasters, cable, and satellite will continue to push for more compression and more channels.
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Old August 26th, 2006, 03:20 PM   #11
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^The FCC and ATSC doesn't really care about 1080p60 because they think it's impossible right now to deliver to millions of homes across the country. Because of that, MPEG won't include 1080p60 as a standard.

But still, I really wish that VLC could decode AVCHD.
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Old October 13th, 2006, 12:08 PM   #12
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Mac OSX?

Hi all,

anyone know what software or codec out there for Mac OSX to view these samples ??


Thanks
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Old October 13th, 2006, 12:50 PM   #13
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From what I have gathered, there is no player yet for the Mac. It is hard to find a player for the PC. I am able to watch full framerate AVCHD using Nero 7 Showtime.
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Old October 13th, 2006, 12:55 PM   #14
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Hi Guy,

Thanks for the info. I also just got an email from people at CoreAVC, they said there would be CoreAVC for Mac OSX in December. ;)

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Old October 14th, 2006, 05:08 PM   #15
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Hi,
you can also rename the clips to
name.m2t
and play it with the shareware
www.elecard.com
player.

This is medium fast on a P4 3.2 Ghz without HT,
about 3 to 5 frames/sec.

The Nero 7 Showtime player plays it a bit faster,
but without sound... hmm..
maybe have to update Nero.

also you can rename them to *.mpg
if you still have problems and play it Graphedit
or with Windows Mediaplayer, if you have installed
the trialversion of Cyberlink PowerDVD 7.

Is there currently any faster Directshow decoder available,
so I can play these clips in realtime on a stadard P4
3.2 Ghz with no HyperThreading ?

If you really need soo much horsepower in your CPU to play
these clips in realtime, these are not good for redistribution,
because no one can play these clips...
So HDV in MPEG-2 is then much better, cause I can play them
in realtime and very smooth on my machine...
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