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Blocky Artifacts in my RED image after I export the film
This is my original footage from the RED Scarlet color graded in RED Cine Pro X without any artifacts in the image
This is the same footage (no extra color grade) after it has been exported from premiere.
I don’t know how to get rid of this artifacting, I don’t if has to do with my sequence settings or my export settings. I export using H.264 1920×1080
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7 Replies
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You are comparing raw, high bit depth footage to a compressed 8-bit footage. Of course it will look worse. You might want to try upping the bitrate for the export.
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Ah H264 that fantastic high quality codec.
I wonder why no high quality cameras use that codec and use RAW instead.
As posted you need to up the datarate and even then you maybe seeing issues being at 8 bit.
Id test using a 10 bit uncompressed output.Pat Horridge
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[Steven Sproul] “I don’t know how to get rid of this artifacting, I don’t if has to do with my sequence settings or my export settings.”
The artifacts are banding. What were the export settings, and what are the final delivery requirements? Blu-rays are encoded at 30-35Mbps, and 20-24Mbps will produce very good results for 24-30fps footage using High Profile @ Level 4.1. Set Maximum bitrate to 1.5-2.0 times the target bitrate, and key frame distance equal to frame rate. In the export panel under the Multiplexer tab set Multiplexer to MP4 and Stream Compatibility to Standard.
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My Codec is H.264, 23.976 Frame Rate, Aspect Square Pixels (1.0), Depth 24 bit.
I didn’t set my Key Franme or Bitrate settings. I’m not too familiar with those settings. I’m not too sure what you mean by delivery requirements. I just need the final export of the film to look as look as the RAW footage or better. The film will be submitted to film festivals via dropbox or a DVD. I don’t know if that is what you mean delivery requirements -
Key Frame Distance will be OK on automatic, but bitrate and multiplexer directly impact the artifacts. Try exporting a short clip using the settings listed above with 20Mbps Target bitrate and 35Mbps Maximum bitrate. If required you can boost Target bitrate to 30-35Mbps and Maximum bitrate up to 62.5Mbps.
Delivery requirements refer to the final export specifications. Film festivals will often post specs for submitted movies (codec, bitrate, resolution, etc). Expect to generate several copies to meet the unique requirements of each festival.
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What about Format, should I choose a specific format for exporting RAW footage or should I stick with Quicktime, and should I also stick with H.264 or go with Apple Pro Res 422 or something else??
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For distributed files set Format to H.264 rather than QuickTime. ProRes is an intermediate format; you will need a very fast computer to play 1080p ProRes files in real time. Try a test clip, if desired.
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