Norman Black
Forum Replies Created
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Either one would probably work about the same. You will need to have Quicktime installed to use them.
Apple ProRes is really an Apple “copy” of Avid DnxHD. For the most part it mimics the bitrates and features of DNxHD, and both of these are not much different than Motion jpeg. DnxHD and ProRes are very high bitrate codecs, so your files will be large. They are all fundamentally I-frame only, DCT image compression codecs. The technical particulars are what differs.
The current versions of Quicktime have a ProRes decoder built-in. DNxHD you will have to install. It is free here.
https://avid.force.com/pkb/articles/en_US/download/Avid-Codecs-LE-2-3-9I have used DNxHD as intermediates to pass to Handbrake and have had no problems.
If you load a lot of Quicktime media clips, about 50, into a project you will run into memory problems. The main problem here is that QT is 32-bit only and Vegas uses a 32-bit helper program (FileIOSurrogate) to access QT and this program runs out of memory. There is no workaround to this limit.
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Hopefully Schooltube has recommendations for encode settings. Much like Youtube and Video have recommended settings. I would go with those settings.
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You never mentioned what your source media is. MP4 does not tell us anything. A MediaInfo report would be good. The higher quality the source is, codec+bitrate, the better intermediate you will want to preserve MAX quality.
Sony MXF HD422, Sony MXF HD EX 35Mbps, or XDCAM EX 35Mbps MP4 are all high quality and about the easiest to edit. They are MPEG-2 formats.
XAVC Intra will be very high quality, but harder to decode than the above. XAVC-S will be very high quality with similar decode performance to XAVC Intra.
Going outside native Vegas codecs.
Cineform is very nice. It is free if you install the free GoPro studio software. You don’t have to use the software. It installs Video for Windows (AVI) and Quicktime codecs. Best to use the AVI variant here. This would be like XAVC Intra with some higher quality modes available. Probably easier to edit than XAVC Intra.
Quicktime DNxHD is nice and free. This would be like XAVC Intra with some higher quality modes.
Quicktime PNG or Motion Jpeg might work for you as well.
Only you can test playback performance on your machine. Render a test and check it out.
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Assuming your Vegas project setting match your media settings, then it’s not Vegas doing it. Your shutter speed might be too high. That can make things stroby looking. At 24p you typically don’t want to go higher than a 48th of a second.
In general, you can still have issues with pans at a specific rate. Above and below that rate come out better.
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XAVC-Intra in Vegas could work for a near lossless output if your project is in one the resolutions and frame rates supported by the XAVC templates.
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No keyframing necessary if you are doing a flash transition like in the example Youtube video. Otherwise keyframes are necessary since a video effect does not change its visual effect without keyframes.
The flash in this example video goes over the entire frame. It is only full white for a single frame. I downloaded (YTD Downloader) and advanced the video frame by frame to determine this.
Watching the example, it appears to be a simple brightness bloom/clipping. It seems to only be in the face and neck because of the speed of the transition. The brightest areas clip out first and thus stay clipped the longest and that is what you are noticing. The longest period of blooming is the bright white window/light over his shoulder. It is already near pure white already.
As for effects. Brightness, levels, exposure (color corrector effect) can all be used to get a result like this. Each will look slightly different depending on what your taste prefers.
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I does appear to be a transition. The speakers hands are in a different spot before/after the flash.
For a transition, try the Vegas Flash transition. Soft Flash preset should be good.
Without a transition, then simply keyframing the Brightness and contrast effect on the brightness control should do the trick. First keyframe would be no brightness change, the middle keyframe would be brightness 1.0, and the last would be brightness back to no change. About a half second between each keyframe should be close to the effect.
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Glad it worked. Yes, writing 4GB+ to disk takes a while. Also, don’t worry about audio quality loss. There is no loss “converting” from PCM to PCM audio.
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I was hoping MediaInfo would have said something more than WAV. Hoping for W64 or RF64. Changing the extension is not likely to do anything. Applications don’t care about the file extension. They go my what the file header tells them.
It is interesting that in the MediaInfo report the file is exactly 4GB in size. It is possible to have normal WAV format files be up to that size. Not all applications would support this. This can happen if the offsets in the file are treated as unsigned numbers, versus signed. Supposedly Vegas does support these files. There is even a preference to render up to 4GB WAV files. Unchecked by default.
I also wonder about a boundary condition problem since the file is at the exact limit if it is a classic WAV format. If so, the boundary bug could be in Vegas or the software that generated the file.
Whatever the file is, Vegas does not like it. You need to find some tool that does like it and convert to something Vegas does like. W64 or split the file into a few pieces.
Maybe the eac3to utility. “eac3to Problem.WAV Fixed.W64” -
There are a couple of WAV extensions for large WAV files. The Sony W64 format (Soundforge) and the RF64 format. Sony Vegas obviously supports the W64 format but I do not think it supports the RF64 format. MediaInfo should be able to identify which WAV extension format was used.