ALL: Ac 130/160 vs Sony pmw ex1?
- Thread starter firehawk
- Start date
Barry_Green
Moderator
In prior testing between an HPX370 and an EX3 I found the rolling shutter to be basically identical between those two. The AC160 uses the same chipset, and should therefore have the same rolling shutter.
As for codecs, both use long-GoP 4:2:0 at 1920x1080; the Sony uses the older MPEG2 technology at a higher bitrate, the AC130/160 use the newer MPEG4 technology at a lower bitrate. I compared the two codecs in a separate test and found that for the most part they are very comparable, and when pushed really hard the AVCHD holds up better than the MPEG2. So for codec, the AC160/AC130 have the advantage.
I would suspect that for chroma keying they will perform very similarly to each other.
If you need even higher keying performance you could get a Ninja or Samurai and record the 4:2:2 output of the SDI or HDMI ports.
As for codecs, both use long-GoP 4:2:0 at 1920x1080; the Sony uses the older MPEG2 technology at a higher bitrate, the AC130/160 use the newer MPEG4 technology at a lower bitrate. I compared the two codecs in a separate test and found that for the most part they are very comparable, and when pushed really hard the AVCHD holds up better than the MPEG2. So for codec, the AC160/AC130 have the advantage.
I would suspect that for chroma keying they will perform very similarly to each other.
If you need even higher keying performance you could get a Ninja or Samurai and record the 4:2:2 output of the SDI or HDMI ports.
rzr219
Well-known member
SDI output specs
SDI output specs
I have been going over the forms and website and I am unable to find one spec. I will be getting a 160 and looking at getting a Ninja or Samuri, I know the output of the HDMI is 8 bit at 4:2:2, what is the spec of the SDI? I ask because if it the same then I will get a Ninja and save myself $600, if its 10bit then I will go the the Samuri. I know this next question is different, but the more I read about the Autofocus issue, the more I worry. Are they working on a fix you think?
SDI output specs
I have been going over the forms and website and I am unable to find one spec. I will be getting a 160 and looking at getting a Ninja or Samuri, I know the output of the HDMI is 8 bit at 4:2:2, what is the spec of the SDI? I ask because if it the same then I will get a Ninja and save myself $600, if its 10bit then I will go the the Samuri. I know this next question is different, but the more I read about the Autofocus issue, the more I worry. Are they working on a fix you think?
What I've read here on this board, is that the SDI output it 10bit, but the signal coming out of it is 8bit. I believe that the camera only processes 8bit & then adds a empty information to meet the 10bit spec, but it really is only sending 8bits of data.
The HPX250 has some different hardware in it & it produces a 10bit signal (even though they have the same chips), so if you really need 10bit you'll have to go up to the 250.
If you're only going to use the SDI to a recorder, then HDMI is going to be the same. But SDI has a lot more professional flexibility & a lot more uses than HDMI, so worth the price if you need to run a video feed from your camera longer than 20 feet.
The HPX250 has some different hardware in it & it produces a 10bit signal (even though they have the same chips), so if you really need 10bit you'll have to go up to the 250.
If you're only going to use the SDI to a recorder, then HDMI is going to be the same. But SDI has a lot more professional flexibility & a lot more uses than HDMI, so worth the price if you need to run a video feed from your camera longer than 20 feet.
rogar-Happy(DBG):