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Again, the performance has nothing to do with raw file size and everything to do with how the video is encoded. It takes a finite amount of time to decode the changes from frame to frame in an H.265-encoded video, and PD has to do that for all 15 frames that will eventually be discarded to create the correct content for the 16th frame. Your computer simply can't do that in real time during the timeline preview.
Pre-producing the sped up clip is the simplest way around the issue, or you can convert the clip into an intermediate codec, like MagicYUV. You will then be able to preview in full quality without any lag even though the raw file size is many times larger than the original clip. That's because each frame is stored as a full image instead of a list of changes from the previous frame so it's effortless for PD to skip 15 frames.
There's a free and also a low cost version of MagicYUV available here, and the quickest way to make this work is to convert the clip then save it to the same folder as your original c115.MP4 clip..
With PD closed, rename the extension of the original clip to something like .old, then change the name of the MagicYUV clip to c115.MP4. When you open PD again, it wiall automatically use the new clip in your existing project and you'll see perfect performance right away, assuming you haven't made any other significant edits, like color corrections or CLUTs.
If you have made those kinds of edits, pre-producing is really the best option
That makes more sense. I did not realize you were suggesting to produce the clip *at 16x*. I assumed you meant to produce it for the purpose of lowering the quality. Pre-producing it at 16x and then importing it (or converting the codec) would work but the time/effort is probably not worth it for me. I'll likely just continue using 8x which is good enough. Thanks for the feedback!
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Previewing a clip at 16x normal speed requires PD to decode and process the clip 16x faster than normal, which is something most computers won't be able to do. Especially with high pixel size or high bitrate clips.
You'll be much better off using the Range Select feature to produce that clip, then replace the original version on the timeline with the produced version to relieve PD of that highly compute-intensive task
I assumed that the preview would use the shadow files so the large raw file size would not be an issue. I tested exporting the file first and even with the new file (size reduced by about 90%) the issue remains. It still took right at 25 seconds to play a 150 second clip. I also recorded a new video at 1080 resolution and got virtually identical results. I uploaded the exported video and the new video to the link above.
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Hi,
I'm assuming the issue is only the preview performance that you would like to solve, and that the final production is OK?
I think the best way to get suggestions is probably to share a file so that other members, with differing systems, can see what happens on their systems. At 4k that would require using a file sharing platform but please read this post on privacy before doing so. https://forum.cyberlink.com/forum/posts/list/83643.page
Cheers
PowerDirector Moderator
Yes, the only issue is with the preview performance. The final videos are fine. I uploaded a sample video file and project file here: https://drive.google.com/drive/folders/1kkhQrI8yugyVnIKdOU_j9dqkiEZp7TtO?usp=share_link
I'm definitely curious if others have the same issue or if there are any other recommendations. It's not a major issue but it would be nice to be able to preview videos at higher speed.
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I'm having issues trying to speed up my video preview to 16x. I'm trying to watch it at very fast speed to catch certain things and when I go to 16x it gets choppy and plays back slower than 8x speed. As an example, I tested a video that was 150 seconds long and timed the playback at 8x at about 19 seconds (7.9x). I played the same clip at 16x and it took about 25 seconds to play the same clip (6x). The files are recorded on a GoPro at 4k 30fps. It's possible that it's just unrealistic to hope for smooth playback at 16x but I have a pretty powerful system (dxdiag attached) and I've tried all the recommendations I could find including:
- Enabling shadow files
- Rendering a preview
- Trying with a short video
- Changing preview quality to low
I'm not oppossed to upgrading to a later version but I don't really need any other features so I would only want to do that if the newer version were better able to handle things like this. Any advice is appreciated!
PowerDirector Version: 19.0.3226.2 (64-bit)
Version type: Ultimate
SR number: VDE210510-08
DxDiag file attached
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Hello my friend. I have the same problem with the shadow file and I have no idea what to do. Can you tell me please how you solute it ? Is it because of trial version or smth else?
Yeah, going to the full version solved all of my issues. I think the answer is that the trial version doesn't support working with 4k files. They do tell you that in advance but if you try it anyway, you don't get always get helpful error messages, it just "sort of" works. Some things worked, some things (like exporting) give clear error messages about not being supported in the trial version, and other things didn't work but didn't give specific errors about the trial version. The full version has not had any issues at all and I've been very happy with it.
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Yeah, that's a good point. I'm having a few weird issues that I didn't have with smaller resolution files (mostly freezing at weird times for 20+ seconds and not showing a preview when zooming) but it's certainly possible the issue is due to it being the trial version and not due to the actual processing requirements of the larger resolution files. I updated the graphics drivers and it didn't help so I think I will go ahead and buy the full version and if I still have issues I'll research those issues specifically and use the 30-day guarantee if it doesn't work out. Thanks for the advice!
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I understand what you're saying, but I believe that the issue is almost certainly caused by the trial version based on the significant restrictions that are enforced as compared to the full version.
Remember that you should be able to disable shadow files completely and still work with 4K clips smoothly while editing, even in the trial version. Updating the video driver may bring additional stability and performance improvements, especially with the full version.
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I appreciate the advice but the error message did not say anything about the trial version (this was not clear in my post, I apologize). The error message I'm getting is included in an attached screenshot and summarized in the title of the post, the error is "The shadow file on ..... is unavailable because it is broken or contains an error. Try deleting it in General preferences, and then try again". If the error simply said that the trial version didn't support 4k import then this would be very simple but it's a different error. Also, the trial version definitely does support 4k import, I can import 4K videos, edit them extensively, and export to lower resolution just fine. The fact that exporting 4k gives a clear descriptive error saying it's not supported in the Trial version makes me think the shadow file issue is something else.
Great advice on the graphics card drivers, I'll update those now.
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As was stated in the error messages, the trial version cannot be used with 4K videos. There is no such restriction in the full version, and I think the easiest way to get the full experience is to purchase the lifetime license for PD19 and use the 30 day money back guarantee if it doesn't meet your needs.
Your system's i7-8700K is poewerful enough to work with 4K clips without needing shadow files, but you should update the nVidia driver for your GTX 1080 as the installed version is almost 2 years old.
I should add that it's very important to install the trial version before installing the full PD19 program.
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I'm getting an error when importing 4k videos. I'm currently evaluating the trial version and likely going to purchase the lifetime license for PowerDirector 19 Ultimate but I'd like to make sure I can resolve this issue. I'm wondering if anyone can tell me if this issue is exclusive to the trial version. It did say something about needing the full version to import/export 4k video. If I try to export 4k videos it says I need the full version. If I try to import 4k videos it seems to work fine except that it cannot create the shadow files. Any idea if the trial version supports importing 4k files but does not support shadow files? If that isn't the issue, are there any recommendations for how to solve the issue? The files are created by a GoPro 7 and every file has the same issue, deleting the temporary files does not help.
Version: 19.3.2730.0 (64-bit)
SR number: VDE210311-01
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