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cannon xlh1
I’ve just taken on a project involving a cannon xlh1, I know it has an BNC SDI output, is this a uncompressed HD output or is it a compressed mpeg output the same as what would come down the firewire, also would the res be 1440x1080i anomorphic, to be put in a 1920x1080i timeline, would a small SATA raid be sufficent for
editing with program is about 5min with about 3hrs rushes. -
7 Replies
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The Firewire and SDI signals are absolutely the same — both are HDV, which is an MPEG-based compressed format. HDV files sizes and hard drive requirements are essentially the same as DV, so your SATA raid will be just fine. Many people with capture cards prefer to capture HDV in a non-MPEG-based format such as DVCPro100 for many reasons which you can read about all over the Internet, but FCP is very capable of editing the HDV format as is.
DRW
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Not so. Canon states that the “BNC connectors provide HD-SDI (SMPTE 292M) and SD-SDI (SMPTE 259M) uncompressed 1.485 gigabit/second output with 4:2:2 color sampling.” Hardly HDV specs.
pvw
Phil Van West
Terra Nova Productions
Denver, CO
Video Production/Post-ProductionG5 DP 2.5GHz / 4.5 GB RAM / OS 10.4.8 / FCP 5.1.2 / QT 7.1.3
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True, but you can only get any advantage from it when capturing live to a strong RAID. You don’t gain anything when capturing from tape.
Nevertheless, it can make sense to ingest HDV via SDI to DVCProHD with AJA or BlackMagic cards. This codec puts less stress on the CPU and makes your workflow more comfortable.Regards,
Uli
Author of “DVDs gestalten und produzieren”, a book on professional DVD-authoring in German.
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Yes, exactly. To reinstate it in simple terms…
LIVE SDI Output: Uncompressed 4:2:2
TAPE SDI Output: Uncompressed but with the encoding artifacts of compressed MPEG-2 HDVTo clarify, the live output to the SDI port is post-imager and pre-HDV encoding. Of course, when you play the tape back, the SDI port will then output the effects of the compressed HDV tape format even though it’s in an uncompressed “shell” of sorts.
This camera makes for a nice studio camera for chromakey use if you can capture the live SDI feed directly to an uncompressed NLE system. You then will have uncomrpessed 4:2:2 media to key from, rather than highly compressed HDV media.
Marco Solorio | OneRiver Media
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The imager in the Canon H1 (and it’s newer siblings) is the best in it’s class.
During a huge HD event last summer we tested it with a P&S adapter, cine prime lenses and a Megacine harddisk recorder. Even experienced DOPs used to high-end HD cameras (which were around at the same time, from 950s to Arri D20 and Thompson Viper) were impressed with the quality. The original lens, OTOH, is pretty much unacceptable for a professional shooter.Regards,
Uli
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The *only* thing I don’t like about the camera however is that it’s natively interlaced. If Canon had made it natively progressive, I think it would have really taken a larger chunk of the market. Who knows, maybe we’ll see something at NAB from Canon. It took *years* for Sony to finally come up with the V1U, maybe Canon will follow in their tracks, even if they’re the last to do so.
Marco Solorio | OneRiver Media
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Does the cannon shoot anomophic 1440×1080 or 1920×1080 if the first, Do I still need to put this into a 1920×1090 timeline
and why do people decode to DVCpro100 is this because it is easier to work with and take it out of the mpeg format
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