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TOPIC: Lagging when editing

Lagging when editing 1 year, 4 months ago #133834

  • sc2142
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  • 1 year, 4 months ago
When im playing back video in lwks, The video lags, The video freezes, and i only hear audio. It used to work just fine, But now it does this.

Re: Lagging when editing 1 year, 4 months ago #133857

  • hugly
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  • 1 year, 4 months ago
Hello and welcome!

This could be related to the video fromat you use or to your computer, or to both, or maybe to something else.

To find out, additional information is needed. Please post a Mediainfo report and details of your computer system as explained here:
www.lwks.com/index.php?option=com_kunena&func=view&catid=23&id=66072&Itemid=81
It's better to travel well than to arrive...
Last Edit: 1 year, 4 months ago by hugly.

Re: Lagging when editing 1 year, 4 months ago #133860

  • sc2142
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  • 1 year, 4 months ago
hugly wrote:
Hello and welcome!

This could be related to the video fromat you use or to your computer, or to both, or maybe to something else.

To find out, additional information is needed. Please post a Mediainfo report and details of your computer system as explained here:
www.lwks.com/index.php?option=com_kunena&func=view&catid=23&id=66072&Itemid=81


General
Complete name                            : F:\New files\recordings\FiveReborn\FiveReborn 01.18.2017 - 02.35.26.40.DVR.mp4
Format                                   : MPEG-4
Format profile                           : Base Media / Version 2
Codec ID                                 : mp42 (mp41/isom)
File size                                : 2.19 GiB
Duration                                 : 7 min 30 s
Overall bit rate                         : 41.8 Mb/s
Recorded date                            : 2017
Encoded date                             : UTC 2017-01-18 09:35:26
Tagged date                              : UTC 2017-01-18 09:35:26

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4.2
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 1 frame
Format settings, GOP                     : M=1, N=30
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 7 min 30 s
Source duration                          : 7 min 30 s
Bit rate                                 : 41.6 Mb/s
Width                                    : 1 600 pixels
Height                                   : 900 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Variable
Frame rate                               : 56.198 FPS
Minimum frame rate                       : 0.984 FPS
Maximum frame rate                       : 63.830 FPS
Original frame rate                      : 60.000 FPS
Standard                                 : PAL
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.514
Stream size                              : 2.18 GiB (100%)
Source stream size                       : 2.18 GiB (100%)
Encoded date                             : UTC 2017-01-18 09:35:26
Tagged date                              : UTC 2017-01-18 09:35:26
Color range                              : Limited
Color primaries                          : BT.601 NTSC
Transfer characteristics                 : BT.470 System M
Matrix coefficients                      : BT.601
mdhd_Duration                            : 450087

Audio
ID                                       : 2
Format                                   : AAC
Format/Info                              : Advanced Audio Codec
Format profile                           : LC
Codec ID                                 : 40
Duration                                 : 7 min 29 s
Source duration                          : 7 min 29 s
Bit rate mode                            : Constant
Bit rate                                 : 192 kb/s
Channel(s)                               : 2 channels
Channel positions                        : Front: L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 spf)
Compression mode                         : Lossy
Stream size                              : 10.5 MiB (0%)
Source stream size                       : 10.5 MiB (0%)
Encoded date                             : UTC 2017-01-18 09:35:26
Tagged date                              : UTC 2017-01-18 09:35:26
mdhd_Duration                            : 449856

Re: Lagging when editing 1 year, 4 months ago #133865

  • hugly
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  • 1 year, 4 months ago
Thanks.

I still don't know much about your computer, except that you're on Windows and you use a separate hard drive (hopefully) for your media.

I guess Mediainfo shows a screen recording.

This is (most likely) the reason for your problem, variable frame rate

Frame rate mode                          : Variable
Frame rate                               : 56.198 FPS
Minimum frame rate                       : 0.984 FPS
Maximum frame rate                       : 63.830 FPS
Original frame rate                      : 60.000 FPS

Variable frame rate isn't supprted by Lightworks and can lead to more or less severe sync problems between audio and video.

The problem should be fixable by transcoding your footage into a more suitable format for editing. Best choice is to use an intermediate format developed for editing. Here you will find one possible procedure to do that:

www.lwks.com/index.php?option=com_kunena&func=view&catid=6&id=118956&limit=15&limitstart=15&Itemid=81#119003

See if that works for you.

Just because I'm curious, what software do you use for screen recording?
It's better to travel well than to arrive...
Last Edit: 1 year, 4 months ago by hugly.

Re: Lagging when editing 1 year, 4 months ago #133866

  • sc2142
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  • 1 year, 4 months ago
Okay, I just tried importing the video without using HandBrake, The video runs fine with no lag. When running the video through HandBrake and setting the FPS to Constant The video freezes, and i only hear audio.

Re: Lagging when editing 1 year, 4 months ago #133867

  • hugly
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  • 1 year, 4 months ago
Okay, have you read my post above?
It's better to travel well than to arrive...
Last Edit: 1 year, 4 months ago by hugly.

Re: Lagging when editing 1 year, 4 months ago #133883

  • sc2142
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  • 1 year, 4 months ago
Thank you, When using EyeFrame it fixes my issue.

Re: Lagging when editing 1 year, 4 months ago #133885

  • hugly
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  • 1 year, 4 months ago
Glad to hear that.
It's better to travel well than to arrive...
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