Imported video shows only black screen

Samuel-L wrote on 4/29/2023, 3:46 PM

I'm trying to use a video file. Vegas shows his property, I can put it into the timeline, but in the preview window, I see only a black screen. When I render it, the result is the same - black frames.

I'm using the Trial version Vegas Pro 20.0 on Windows 11(64-bit) as Virtual Machine in VirtualBox. I have the same issue also in Sony Vegas Pro 12 on Windows 10.

The video was created on Ubuntu as screencast by the Kazam application:

General 
Complete name : C:\Users\User\Projects\Screencast5.mp4 
Format : MPEG-4 
Format profile : Base Media / Version 2 
Codec ID : mp42 (mp42/mp41/isom/iso2) 
File size : 45.5 MiB 
Duration : 1 min 3 s 
Overall bit rate : 6 013 kb/s 
Frame rate : 25.000 FPS 
Encoded date : 2023-04-25 12:29:20 UTC 
Tagged date : 2023-04-25 12:30:27 UTC 

Video 
ID : 1 
Format : AVC 
Format/Info : Advanced Video Codec 
Format profile : High 4:4:4 Predictive@L4 
Format settings : 1 Ref Frames 
Format settings, CABAC : No 
Format settings, Reference frames : 1 frame 
Codec ID : avc1 
Codec ID/Info : Advanced Video Coding 
Duration : 1 min 3 s 
Bit rate : 6 012 kb/s 
Maximum bit rate : 2 097 kb/s 
Width : 1 634 pixels 
Height : 1 194 pixels 
Display aspect ratio : 4:3 
Frame rate mode : Constant 
Frame rate : 25.000 FPS 
Color space : YUV 
Chroma subsampling : 4:4:4 
Bit depth : 8 bits 
Scan type : Progressive 
Bits/(Pixel*Frame) : 0.123 
Stream size : 45.5 MiB (100%) 
Writing library : x264 core 155 r2917 0a84d98 
Encoding settings : cabac=0 / ref=1 / deblock=0:0:0 / analyse=0:0 / me=dia / subme=0 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=6 / threads=4 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=0 / weightp=0 / keyint=250 / keyint_min=25 / scenecut=0 / intra_refresh=0 / rc=cqp / mbtree=0 / qp=15 / ip_ratio=1.40 / aq=0 
Encoded date : 2023-04-25 12:29:20 UTC 
Tagged date : 2023-04-25 12:30:27 UTC 
Color range : Limited 
Color primaries : BT.709 
Transfer characteristics : BT.709 
Matrix coefficients : BT.709 
Codec configuration box : avcC 
 

I will be grateful for any advice.

Comments

RogerS wrote on 4/30/2023, 12:56 AM

8 bit predictive 4:4:4 AVC is an odd combination. In the original software can you set it to High 4:2:0? While you're at it limit the keyframe interval length to keyint=25 instead of 250 for better performance.

If you can't do that try a re-encode with ShutterEncoder or Handbrake to a more standard AVC 8-bit high profile 4:2:0 or if there's real 4:4:4 detail, re-encode to ProRes?

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Samuel-L wrote on 4/30/2023, 5:50 AM

I don't know much about codecs. I will check the options or settings, a newer version or another sw for the screencast. I appreciate the help.

john_dennis wrote on 4/30/2023, 10:06 AM

Try OBS Studio.

https://obsproject.com/

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walter-i. wrote on 5/1/2023, 2:51 AM

@Samuel-L
And here are a few settings that Vegas Pro handles well.
https://www.vegascreativesoftware.info/us/forum/faq-what-obs-studio-settings-work-well-with-vegas-pro--109925/