Clip Intermittently Jumping to Later Frames
I am working on a video, and I have one clip that is doing something strange: The clip will randomly insert a frame (or several between current frames) from later in the clip. This only happens when the clip is on the timeline, not in the viewer. And even then, it only shows up sometimes when I am scrubbing through or when I go frame-by-frame, but it ALWAYS shows up in the export. I change little things to try to get rid of it and the problem changes without any apparent pattern (more frames jumping, closer together, etc). Any idea on what to do? I have already tried to pull a new version of the clip, but the same thing happens. Here is a clip of the export.
Just for the record, the first transition is a separate composite shot, the problem clip is not part of that comp.
Comments
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Triem23 Moderator Moderator, Website User, Ambassador, Imerge Beta Tester, HitFilm Beta Tester Posts: 19,953 AmbassadorDownload MediaInfo (it's free), generate a Tree report for the problem video file and paste it here.
My guess is the problem video is Variable Frame Rate (VFR). VFR can cause issues with any NLE, including Hitfilm. The solution is to transcode the video to Constant Frame Rate (CFR) before import to Hitfilm.
All video from any phone or tablet is VFR. Most screen recorder video is also VFR.
Assuming your video turns out to be VFR, let's talk about the fix.
Starting at 23:40 in this video is a section on transcoding VFR to CFR with Handbrake, including optimized setting for speedy Hitfilm editing. Later sections show transcoding using other software, earlier sections discuss how digital video works, including a discussion of VFR.
Once your video is transcoded, open your original project. Right click the problem video and select "Relink." Select the transcoded file. This swaps the original and transcoded versions in your project and preserves most of your edit. I say "most," because you'll have to step through your project and see if the transcode is causing any drift. If so, it's gonna be a few frames here and there. The "Slip Edit" tool will let you nudge your footage into place.
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Here is the report, I copied the text report instead of the tree because the tree report was not able to be copied (Unless you wanted a screengrab of that I suppose) :
General
Complete name : D:\BASF Wallets & Journals\GX010627.MP4
Format : MPEG-4
Format profile : Base Media / Version 1
Codec ID : mp41 (mp41)
File size : 264 MiB
Duration : 36 s 770 ms
Overall bit rate : 60.2 Mb/s
Encoded date : UTC 2021-01-09 10:00:03
Tagged date : UTC 2021-01-09 10:00:03
Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : [email protected]@Main
Codec ID : hvc1
Codec ID/Info : High Efficiency Video Coding
Duration : 36 s 770 ms
Bit rate : 59.9 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 59.940 (60000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Bits/(Pixel*Frame) : 0.121
Stream size : 263 MiB (100%)
Title : GoPro H.265
Language : English
Encoded date : UTC 2021-01-09 10:00:03
Tagged date : UTC 2021-01-09 10:00:03
Color range : Full
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : hvcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 36 s 757 ms
Bit rate mode : Constant
Bit rate : 192 kb/s
Nominal bit rate : 48.0 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 849 KiB (0%)
Title : GoPro AAC
Language : English
Encoded date : UTC 2021-01-09 10:00:03
Tagged date : UTC 2021-01-09 10:00:03
Other #1
ID : 3
Type : Time code
Format : QuickTime TC
Duration : 36 s 770 ms
Bit rate mode : Constant
Frame rate : 59.940 (60000/1001) FPS
Time code of first frame : 10:09:36:58
Time code, striped : Yes
Title : GoPro TCD
Language : English
Encoded date : UTC 2021-01-09 10:00:03
Tagged date : UTC 2021-01-09 10:00:03
Other #2
Type : meta
Duration : 36 s 753 ms
Bit rate mode : Variable
Duration_LastFrame : -284
Other #3
Type : meta
Bit rate mode : Variable
mdhd_Duration : 36770
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I have tried this now, but it is not working. It won't let me relink the file, I think because the new version is M4v, and the old is mp4. I tried dropping the new one in the timeline, exporting it, and using that exported mp4 to relink but the original problem persisted even then. Any advice? Thanks for the help thus far!
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Triem23 Moderator Moderator, Website User, Ambassador, Imerge Beta Tester, HitFilm Beta Tester Posts: 19,953 Ambassador
Rename the M4V to MP4, and the relink should work. Sorry, I didn't think to specify that.