Rendered video lagging/showing black screen (Vegas Pro 20)

PurpleDuck wrote on 5/20/2023, 3:12 PM

Hi

I wonder if someone can help out. I have the newest version (I think, there was an update a while ago) of Vegas Pro 20. (I'm a Windows-user)

The 1st problem is this:

I'm trying to edit a video which contains multiple short videos taken with phone or a GoPro camera, and additional audio/music. The GoPro can film 4K videos and the quality of the phone is HD. While editing, the preview screen goes black very often, which obviously makes it difficult to edit. I've tried to reduce the quality of the preview screen, but it does not help. What should I do with this?

 

The 2nd problem:

When rendered, the finished video is also lagging and clips seem to be "missing"; it shows black screen. Sometimes the audio is still playing, so I suppose it has not actually lost the clips but can't function properly. Is the file size too large? I've tried two different mediaplayers to watch the rendered video, and they both have this issue. I've tried to render the video as Video for Windows (HD 1080-60i YUV) and AVC/AAC/mp4 (Blue-ray 1440x1080-24p, 25 Mbps video stream), but there is no difference. I've tried MPEG-file (M2T-file, HDV 720-30p) but that as well has the same issue. Also, regarding MPEG I'm worried it won't play in all devices we would need it to. The file/format should be something that will be compatible/will play on mainly computers/laptops and PlayStation.

 

I've edited videos many years, but I'm a beginner with these technical things (such as file sizes and stuff) and terms :D In addition, english is not my native language. So if you know how to fix this, please try to explain with simple terms, thank you! I used to have Vegas Pro 10 many years ago, and I remember having this same problem back then but could not fix it (different computers). So now that I started editing again, I was concerned that this might still be an issue, but I bought the Vegas Pro 20 anyway. And, well. I'm dissapointed tbh. But, maybe there's a fix for this? I hope.

 

Sorry for possibly dum questions :D and thank you in advance!

Comments

j-v wrote on 5/20/2023, 3:36 PM

- Which Vegas 20 build is installed, look at Vegas/Help/About?
- Give the MediaInfo of those smartphonefiles following this tutorial : https://www.vegascreativesoftware.info/us/forum/faq-how-to-post-mediainfo-and-vegas-pro-file-properties--104561/
- What is the main goal for your made video's?

met vriendelijke groet
Marten

Camera : Pan X900, GoPro Hero7 Hero Black, DJI Osmo Pocket, Samsung Galaxy A8
Desktop :MB Gigabyte Z390M, W11 home version 24H2, i7 9700 4.7Ghz,16 DDR4 GB RAM, Gef. GTX 1660 Ti with driver 566.14 Studiodriver and Intel HD graphics 630 with driver 31.0.101.2130
Laptop  :Asus ROG Str G712L, W11 home version 23H2, CPU i7-10875H, 16 GB RAM, NVIDIA GeForce RTX 2070 with Studiodriver 576.02 and Intel UHD Graphics 630 with driver 31.0.101.2130
Vegas software: VP 10 to 22 and VMS(pl) 10,12 to 17.
TV      :LG 4K 55EG960V

My slogan is: BE OR BECOME A STEM CELL DONOR!!! (because it saved my life in 2016)

 

PurpleDuck wrote on 5/22/2023, 10:59 AM

Vegas version 20.0 (build 403)

Mediainfo (one of the videoclips):

General

Format                                   : MPEG-4
Format profile                           : Base Media / Version 2
Codec ID                                 : mp42 (isom/mp42)
File size                                : 15.1 MiB
Duration                                 : 6 s 101 ms
Overall bit rate                         : 20.8 Mb/s
Frame rate                               : 29.914 FPS
Encoded date                             : 2023-05-19 06:30:37 UTC
Tagged date                              : 2023-05-19 06:30:37 UTC
com.android.version                      : 13

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4
Format settings                          : CABAC / 1 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 1 frame
Format settings, GOP                     : M=1, N=30
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 6 s 59 ms
Source duration                          : 6 s 51 ms
Bit rate                                 : 20.2 Mb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Rotation                                 : 90°
Frame rate mode                          : Variable
Frame rate                               : 29.914 FPS
Minimum frame rate                       : 29.528 FPS
Maximum frame rate                       : 30.080 FPS
Real frame rate                          : 30.000 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.325
Stream size                              : 14.5 MiB (96%)
Source stream size                       : 14.5 MiB (96%)
Title                                    : VideoHandle
Language                                 : English
Encoded date                             : 2023-05-19 06:30:37 UTC
Tagged date                              : 2023-05-19 06:30:37 UTC
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
mdhd_Duration                            : 6059
Codec configuration box                  : avcC

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 6 s 101 ms
Bit rate mode                            : Constant
Bit rate                                 : 256 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                              : 191 KiB (1%)
Title                                    : SoundHandle
Language                                 : English
Encoded date                             : 2023-05-19 06:30:37 UTC
Tagged date                              : 2023-05-19 06:30:37 UTC

 

The main goal of this video is some sort of a video journal. So there will be several short clips. But right now the video is only 4 minutes long, and still can't play properly.

andyrpsmith wrote on 5/22/2023, 11:29 AM

You may wish to consider converting any variable frame rate video to constant frame rate as Vegas often (but not always) does not like variable frame rate. there are free utilities that can do this such as shutter encoder.

(Intel 3rd gen i5@4.1GHz, 32GB RAM, SSD, 1080Ti GPU, Windows 10) Not now used with Vegas.

13th gen i913900K - water cooled, 96GB RAM, 4TB M2 drive, 4TB games SSD, 2TB video SSD, GPU RTX 4080 Super, Windows 11 pro

j-v wrote on 5/22/2023, 11:34 AM

Problem 1
MediaInfo shows that the video has a variable framerate and that Vegas does not like.
Transfer the video to staedy framerate, f.i. by using the free Handbrake
Problem 2
Use one of the Magix rendertemplates( AVC or HEVC) that suites your project
 

met vriendelijke groet
Marten

Camera : Pan X900, GoPro Hero7 Hero Black, DJI Osmo Pocket, Samsung Galaxy A8
Desktop :MB Gigabyte Z390M, W11 home version 24H2, i7 9700 4.7Ghz,16 DDR4 GB RAM, Gef. GTX 1660 Ti with driver 566.14 Studiodriver and Intel HD graphics 630 with driver 31.0.101.2130
Laptop  :Asus ROG Str G712L, W11 home version 23H2, CPU i7-10875H, 16 GB RAM, NVIDIA GeForce RTX 2070 with Studiodriver 576.02 and Intel UHD Graphics 630 with driver 31.0.101.2130
Vegas software: VP 10 to 22 and VMS(pl) 10,12 to 17.
TV      :LG 4K 55EG960V

My slogan is: BE OR BECOME A STEM CELL DONOR!!! (because it saved my life in 2016)

 

Former user wrote on 5/22/2023, 7:14 PM

Vegas has a very old render engine that should have been retired long ago. It's largely incompatible with Video from phones even though from my observations OBS/screen recordings and phone camera video looks to be the most common formats used on Vegas. It results in dropped frames causing the lagging as well as black frames. You might be able to fix the black frames by choosing the value 0 for dynamic ram preview in vegas preferences . Doing so will reduce timeline playback performance and encoding speed.

Otherwise you have to use software that can see the frames Vegas can't such as any NLE that's not Vegas or transcoding software such as shutter encoder. I have seen problems in other NLE's where the phone is allowed to change frames rates such as 30fps to 60fps to 30fps etc. You want such abilities turned off if going to an editor. But simple VFR phone video unrelated to frame rate changes is a often a problem for Vegas

PurpleDuck wrote on 5/31/2023, 4:24 PM

Thank you all for your help! I will try those tips and see what happens.