Choppy preview playback

beaverbrook wrote on 7/19/2023, 8:42 AM

As I am adding to my project, the playback, even on scenes that I have not done anything with, is getting more and more choppy and unwatchable.
I have 64gbs of ram, an RTX 4090, and a 13900x. How is it not able to play back simple clips with buttery smooth frames? Where is the hardware so strained?

I also have lots of web tabs open. Could that be hurting it?

Thanks.

Comments

RogerS wrote on 7/19/2023, 8:49 AM

What media are you using? https://www.vegascreativesoftware.info/us/forum/faq-how-to-post-mediainfo-and-vegas-pro-file-properties--104561/

If it's HEVC you can try disabling legacy HEVC decoding in preferences/ file io in VEGAS.

That CPU does have an integrated GPU, right? Is it handling decoding in preferences/ file io?

What do you see in windows task manager/performance for memory usage, CPU usage, GPU usage when things are slowing down?

MH7 wrote on 7/19/2023, 8:56 AM

…and a 13900x…

Just to clarify, do you mean you have an Intel Core i9 13900K or a AMD Ryzen 9 3900X? Because if you have the former, the Intel Core i9 13900K, that CPU has an iGPU, Intel UHD Graphics 770, and, according to several users on here, when enabled in the motherboard BIOS alongside your dedicate GPU (in your case the RTX 4090), it does a really good job in preview playback amongst other things.

beaverbrook wrote on 7/20/2023, 5:25 AM

What media are you using? https://www.vegascreativesoftware.info/us/forum/faq-how-to-post-mediainfo-and-vegas-pro-file-properties--104561/

If it's HEVC you can try disabling legacy HEVC decoding in preferences/ file io in VEGAS.

That CPU does have an integrated GPU, right? Is it handling decoding in preferences/ file io?

What do you see in windows task manager/performance for memory usage, CPU usage, GPU usage when things are slowing down?

General
Complete name : C:\Users\brian\Videos\2023-05-19 00-40-17.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 900 MiB
Duration : 6 min 5 s
Overall bit rate mode : Variable
Overall bit rate : 20.7 Mb/s
Frame rate : 60.000 FPS
Writing application : Lavf60.3.100

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.2
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 6 min 5 s
Source duration : 6 min 5 s
Bit rate mode : Variable
Bit rate : 20.4 Mb/s
Maximum bit rate : 40.0 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 60.000 FPS
Minimum frame rate : 58.824 FPS
Maximum frame rate : 62.500 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.164
Stream size : 891 MiB (99%)
Source stream size : 891 MiB (99%)
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
mdhd_Duration : 365516
Codec configuration box : avcC

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 6 min 5 s
Bit rate mode : Constant
Bit rate : 192 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 : 8.53 MiB (1%)
Title : simple_aac_recording0
Default : Yes
Alternate group : 1

It doesn't look like HEVC
Yes, the CPU is handling decoding in Preferences
There is nothing that stands out in the task manager. The CPU gets to, at most 20% while playing.

But... now that I am testing it, it is playing pretty well. Although it still slows down in some places.

beaverbrook wrote on 7/20/2023, 5:26 AM

…and a 13900x…

Just to clarify, do you mean you have an Intel Core i9 13900K or a AMD Ryzen 9 3900X? Because if you have the former, the Intel Core i9 13900K, that CPU has an iGPU, Intel UHD Graphics 770, and, according to several users on here, when enabled in the motherboard BIOS alongside your dedicate GPU (in your case the RTX 4090), it does a really good job in preview playback amongst other things.

Yeah, I have the Intel 13900k. I guess the "x" goes with the Ryzen. Sorry.

j-v wrote on 7/20/2023, 5:38 AM

But... now that I am testing it, it is playing pretty well. Although it still slows down in some places.

Be happy than because your AVC mp4 has variable framerate that Vegas does not like at all.

RogerS wrote on 7/20/2023, 8:26 AM

If you continue to have issues, batch convert them to constant framerate. I use ShutterEncoder for that. For phone footage it isn't always necessary but in general I value my time more than my computer's time and just do it so I don't have issues later.

Former user wrote on 7/20/2023, 8:11 PM

General
Complete name : C:\Users\brian\Videos\2023-05-19 00-40-17.mp4
F

It doesn't look like HEVC
Yes, the CPU is handling decoding in Preferences
There is nothing that stands out in the task manager. The CPU gets to, at most 20% while playing.

But... now that I am testing it, it is playing pretty well. Although it still slows down in some places.

That file name format looks like OBS, if it is, you should be encoding to Fragmented mp4 which Vegas can't read and and turn on auto remux in settings and use that version in Vegas. That way you keep your constant frame rate. You are most likely encoding to mkv then remuxing to mp4 which causes the VFR. In OBS encoder settings have keyframe interval set to 1 because you are encoding at 60fps.

If you transcode existing footage use GOP of 60 or transcode via handbrake using one of the production presets