pgb

pgb

Lives in Australia sydney, Australia
Works as a Video online editor
Joined on Sep 7, 2003
About me:

Take more photos and switch off the computer.

Comments

Total: 52, showing: 1 – 20
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On Sony a5100 First Impressions Review preview (572 comments in total)
In reply to:

jhohman: Just got my a5100 and an Atomos Ninja2 is on the way. I'm curious is anyone knows the equivalent Mb/s bitrate for clean HDMI output. I've been searching around but haven't been able to find anything. Given that is is 8-bit, I can't imagine that the 4:2:2 prores is going to be anywhere near, say, the BMPCC's prores internal recording.

About 800 Mbps for 25 fps. The 50mbps internal codec should be very good and similar to Prores in most situations.

Direct link | Posted on Sep 8, 2014 at 20:32 UTC
In reply to:

Jonathan Mac: Looking at the timeline you've got to wonder how much bigger they can get.

and the DCS3 is Kodak electronics with a gutted clockwork job on top, the rest is history. The 5D2 should be in there two as the first affordable `cine' DOF vid cam. It was an unplanned run away success.

Direct link | Posted on Sep 6, 2014 at 23:58 UTC
In reply to:

Omexis: I don't know why Canon doesn't update the Firmware of the 5D Mark III, it's nearing the end of it's production life. I would like to see some extra functionality added into these cameras. RAW video, Intervalometer etc without buying the official Intervalometer remote for £150, I know I can use Magic Lantern or a cheap Intervalometer remote, but that's not the point. Adding a few extras could help sell more cameras before releasing the new version.

You would think that an intervalometer would be a good business decision as people would need to replace their shutters more often.

Direct link | Posted on Sep 6, 2014 at 22:52 UTC
On Sony a7S used to shoot Chevrolet commercial article (278 comments in total)
In reply to:

DaGurney: But it records to some low-bitrate, interframe-compressed, decimated-color garbage codec! Reportedly at the rather pathetic bitrate of 60 Mbps.

Not to mention that shooting motion pictures with a full-frame 35mm sensor is WORSE than using an APS-sized sensor (which matches 35mm motion-picture-sized frames), because the depth of field is often way too shallow to keep moving objects in focus, especially in the low-light conditions for which they're touting this camera.

This is ridiculous. Until these cameras have decent data throughput and a high-quality intraframe codec, they're not serious motion-picture tools.

Intra frame codecs are far less efficient than GOP based and transcoding at faster than realtime is easy too. For a given size, temporal codecs would have better quality.

Direct link | Posted on Aug 22, 2014 at 02:42 UTC
On Sony a7S used to shoot Chevrolet commercial article (278 comments in total)
In reply to:

DaGurney: But it records to some low-bitrate, interframe-compressed, decimated-color garbage codec! Reportedly at the rather pathetic bitrate of 60 Mbps.

Not to mention that shooting motion pictures with a full-frame 35mm sensor is WORSE than using an APS-sized sensor (which matches 35mm motion-picture-sized frames), because the depth of field is often way too shallow to keep moving objects in focus, especially in the low-light conditions for which they're touting this camera.

This is ridiculous. Until these cameras have decent data throughput and a high-quality intraframe codec, they're not serious motion-picture tools.

Since the A7s has great high iso you can stop down 1 stop to equal APS DOF.
Prores or DNX is possible externally, unfortunately in 8 bit but for the price and with many other Sony cameras to protect that's expected. I think the F55 is Sony's serious motion picture tool.

Direct link | Posted on Aug 22, 2014 at 02:24 UTC
On Sony a7S used to shoot Chevrolet commercial article (278 comments in total)
In reply to:

Just a Photographer: There are hundreds of commercial shoots each day that are being taken with the Canon 5D MKII and 5D MKIII.

Because one commercial has now being shot with a Sony mirrorless camera, this is news?

A 12mpx FF camera in 2014 with video specifically in mind, for $2500, that can take most lenses, that's news.

Direct link | Posted on Aug 22, 2014 at 01:56 UTC
On Sony a7S used to shoot Chevrolet commercial article (278 comments in total)
In reply to:

Paul Guba: Oddly it doesn't say why use this camera. With a budget and so many known cameras available why would you choose to experiment on a high budget, high pressure job. Why do I feel like I am not being given the whole story?

Lab D, 50mbps X AVC isn't too shabby and you can record
externally at any bitrate you choose. It is 422.

Only 8 bit though - no solution. Slog2 squeezing 14 bits into 8 could get ugly.

Direct link | Posted on Aug 22, 2014 at 01:39 UTC
In reply to:

KodaChrome25: Reddit demographic: as of May 2013, the median Reddit user is male (59%), 25–34 years of age, and is connecting from the United States (68%).

What more needs saying?

It's like being surprised by the DPReview demographic: armchair attorneys, armchair art critics, armchair media critics, and armchair journalists.

and armchair sensor designers.

Direct link | Posted on Jul 27, 2014 at 21:33 UTC
In reply to:

jkoch2: 4.2.2 4k over HDMI to external recorder? This limits use to tripod and dolly shots with slow set-up and staged action for which there are already various dedicated studio cameras available.

More practical: 4.2.0 4k that records 4k internally to economical cards, with either 5-axis stabilization or gyro-based Balanced Optical Steadyshot. A large sensor is no help if it demands slow readout that aggravates rolling shutter. Any casual video shot in 4k will require a moderate depth of field, or else be marred by focus-hunting or missed focus. A 1/1.7" or three 1/2.3" sensors should be fine for that and produce less heat too. Built-in ND filters great too.

4k successors to the X920, PJ790, G6, GX7, LX7, or HX400 could offer this. Canon or Nikon could, too, but will probably wait 4-5 years. An RX100iii or RX10ii might also succeed, if only the stabilizers and (slow) read-outs improved to reduce jello and banding of hand-held shots that afflict the AX-100 with the same 1" sensor.

'I need 4.2.2 about as much as I need an 18-wheel truck'

422 has been the norm in the pro video world for 20 years, do you want to go back further in time. 420 would be fine for home movies, corporate vids and indie films.

Direct link | Posted on Apr 11, 2014 at 16:18 UTC
In reply to:

peevee1: One more thing about the Sony's marketing BS.
The 4:2:2 4k HDMI output is not real, it is interpolation, you cannot produce real 4:2:2 out of color filter array without oversampling and binning. Bayer has only 1 red and 1 blue pixel in each 2x2 group, you can get good 4:1:1 or 4:2:0 out of it but no real 4:2:2.
Now, 1080p30 out of the whole sensor (but not their line-skipping 1080p60!) could have been real 4:2:2 - I wonder why their internal recording is limited to 4:2:0 only? It should have been 4:2:0 4k (which would be fine) and 4:2:2 (or even 4:4:4) 2k, but they somehow managed to screw everything up. :(

The Arri Alexa, Sony F65 and Red are bayer and they allow debayering to 444 codecs, is this all crap and they only need to make 4:2:0?

Therefore most movies are shot in 4:2:0 and they look pretty good.

Are you saying you need an RGB sensor to create 444 / 422 ?
Is there a RGB cine camera still on the market like the Gensis,
it's pretty much bayer now.
Bayer may sub sample but the synthesis of the other two colours is quite evolved and works. Every Dslr user would probably agree.

Direct link | Posted on Apr 11, 2014 at 16:04 UTC
In reply to:

Ron A 19: What a great idea! The A7s uses the same approach as the d700 - less resolution, more sensitivity. However, now that all cameras can give low noise at ISO 12800, I wonder if it's really necessary for sony to push resolution downward to 12MP. Seems that the real benefits aren't for stills but for low light video. I'm sure this will do very well in a videographer's arsenal.

I think 12mp is more about no down scaling to 4K or an even number to HD. The fact it is cleaner and possibly even more DR is a side effect. It seems to contradict `the pixel size doesn't matter' devotees.

Direct link | Posted on Apr 11, 2014 at 06:49 UTC
In reply to:

Morpho Hunter: Scratches head ...who needs 4k video?

Scratches head in 25 years' time ...who needs 4k video?

4K/UHD certainly takes some processing. I've just been testing a UHD Prores 444 QT on a 12 core mac tower. All the cpu's are 25% busy and that's just playing a QT movie. Data rate is 1.2 Gbps and that's with 6:1 compression.

Direct link | Posted on Apr 11, 2014 at 06:20 UTC
In reply to:

bawbaw: YAY, DpReview once again manage to report more about the video features than the still features of a product launch. I take it once again the editorial team has not managed to work out the P isn't an F and also what the P stands for.

Sorry to say it, but grabbing hits for advertisers at a lack of editorial quality means I visit here a lot lot less than I ever did.

The camera is aimed at the video user with some trail blazing features at this price point. It's also good for amateur and web photography, depending what you shoot.
There's really nothing to mention in the photo mode that the other two A7 can't do. DR and high iso may be better.

Direct link | Posted on Apr 10, 2014 at 22:08 UTC
In reply to:

olyflyer: Very interesting. I always wondered why we can't control the exposure in even higher detail, at pixel level. I understand that currently that's too much to ask, but I believe it is coming some times in the future.

Olyflyer - Magic Lantern has dual iso readout. If he was able to reverse engineer this it would be relatively easy for the manufactures to implement it.
http://www.dpreview.com/forums/post/53174283

Direct link | Posted on Mar 16, 2014 at 09:05 UTC
On Sony a6000 First Impressions Review preview (899 comments in total)
In reply to:

northernblonde1: pgb. Thanks for that link. One of the best reviews ever & wonderful photographs with the a6000. Enjoyed it hugely & learnt a lot!

below http://www.alinpopescu.eu/blog/full-review-focus-tests-sony-a6000-beautiful-dream/

Direct link | Posted on Mar 15, 2014 at 00:30 UTC
On Sony a6000 First Impressions Review preview (899 comments in total)
In reply to:

brownie314: such a pretty little body, but such ugly lenses! OK, here comes the hoard of people telling me that it doesn't matter what a camera looks like. Please, save your comments for 2008. Today - yes it does matter. I like the pancake prime, and the collapsible zoom - but other than that the other primes look like a can of Vienna Sausage.

... or a can of tuna but the body is very businesslike. Time for a change from the Canon melted butter look but that was revolutionary in its day. Strange how things go around in circles.

Direct link | Posted on Mar 13, 2014 at 11:17 UTC
On Sony a6000 First Impressions Review preview (899 comments in total)
In reply to:

Galbertson: Has anyone found an adapter for hot shoe to use higher quality microphone other than sonynys one microphone for nex 6? I am floored sony did not include mic jack., as in nex 7. Seems a given, wouldn't you think?

Of course buying an A7 or future A7000 is whats behind this omission so I doubt a cheap hotshoe interface will be available.

I assume Sony hotshoe mics would go on any Sony camera ?
So I can't see why the stereo mic couldn't be modified. You wouldn't have to toss the mics like on utube but extend them as well so they can be used. It could be done a lot cheaper that he did.
Illegal, your not hacking their code but doing a very basic modification to something that you own, so probably not, and you have to buy a mic from them as well.

I was going to buy an A7 but trying this instead is tempting.

Direct link | Posted on Mar 13, 2014 at 10:53 UTC
On Sony a6000 First Impressions Review preview (899 comments in total)
In reply to:

Galbertson: Has anyone found an adapter for hot shoe to use higher quality microphone other than sonynys one microphone for nex 6? I am floored sony did not include mic jack., as in nex 7. Seems a given, wouldn't you think?

There is a balanced XLR one for $800 !! There's a radio one too for less but I think it was limited to 8khz, ok for voice. One guy hacked an existing hot shoe mic and put a jack on it.

Yeah, no mic in makes this limited for video work without the hassle of a separate recorder and post syncing. It seems to be difficult to record reasonable audio in 2014!

Direct link | Posted on Mar 10, 2014 at 19:06 UTC
On Sony a6000 First Impressions Review preview (899 comments in total)
In reply to:

northernblonde1: pgb. Thanks for that link. One of the best reviews ever & wonderful photographs with the a6000. Enjoyed it hugely & learnt a lot!

Yes, the excellent photography made it credible. The line `iso use-able up to 8000' was very simple to understand. It looks like a great camera. The author is very talented and generous.

Direct link | Posted on Mar 10, 2014 at 18:55 UTC
On Sony a6000 First Impressions Review preview (899 comments in total)

Here's an excellent review -
http://www.alinpopescu.eu/blog/full-review-focus-tests-sony-a6000-beautiful-dream/

Direct link | Posted on Feb 25, 2014 at 17:46 UTC as 137th comment
Total: 52, showing: 1 – 20
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