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Compressor Problem ( I think)
Before I explain my issue, I have successfully completed this type of project at least 15 times with no problems with this exact workflow until yesterday. The project is to be delivered in multiple formats, DVD (NTSC) and Flash for upload.
The video is a Dr. speaking to a classroom audience, he’s showing a PowerPoint while talking to the audience. The project is 3 such talks with a total duration of about 2 hours, 10 minutes.
The footage was shot with a Panasonic HMC-150 (AVCHD), and brought into FCP through “Log and Transfer” and a Pro-Res sequence was created with default settings.
Included in the edit are still frames, and wav files from back-up audio sources. For the most part the video is mostly live footage of the PowerPoint being projected on a screen, with occasional pans to the Dr at a podium, and occasional superimposing of a still image over a slide – very simple stuff.
In FCP all looks very good, so its sent to Compressor, using the preset, “DVD” Best Quality 150 minutes, default settings.
The resulting m2v file out of compressor seems fine when focused on the screen, but the pans to the speaker are artifact-ed, and most surreal – the image is stuttering, although the audio is fine.
My first reaction was to go back to FCP and review the timeline at the same points, but in FCP all is good.
Each speaker at this conference was edited as a separate sequence off the same project, and each had the same issue. (One sequence was exported as a QT Movie (self contained) then compressed, while the others were “sent to Compressor” within FCP – same result)
Has anyone had a similar problem and if so, what was the fix?
Thank you.
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4 Replies
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Hi Bill,
If your movie is 120 minutes, and the setup is for 150 minutes, that means that you can rise the data rate of the .m2v. This should improve the quality of the picture.
However I would recommend you to have a look to other software solution: BitVice, CinemaCraft, Episode..
rafael -
A low bitrate will break up a lot of times when it is going from a still image to a fast camera move. You have to play around with the bitrate settings.
For 130 minutes you can up the average to 4.3Mbps and I would lower the max to 6.5. Make sure there are compression markers at the start of each of the camera pans.
Also you need to be using ac3 audio.
Test this on at least a 20 minute section, it has to start with the shot of the screen for a few minutes and then into the camera move. See if that helps.
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Thanks Rafael – I will look into both changing the bit-rate and the other programs if needed – presently I’m re-encoding with Adobe Media Encoder to see if there is a difference there.
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I will play around with this and see what happens. Thank you.
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