HVEC and AVC Rendering Issues: Artifacting...

j.razz wrote on 7/11/2022, 8:51 PM

Link to samples as well as screen captures of render settings.

These issues were not present in previous builds of Vegas 19. Just the latest 643 build.

I can render this timeline out without issue in AVI uncompressed or ProRes.

I cannot render directly out to mp4 using the HVEC or AVC rendering options without artifacting taking place right after a PNG file (as noted in the HVEC video clip). If I render out to AVC, I tend to get artifacts during the PNG portion- especially at the lower portion of the screen (this particular AVC video doesn't showcase this type of artifacting well). It looks like a low bit rate variable encode where larger blocks are shifting in sync along the bottom 1/16th or so of the screen in unison and at regular intervals.

I also cannot take either the successful (and clean) AVI file I rendered or the ProRes file I rendered and produce a successful mp4 file. I get the same issues as if I rendered directly from the timeline.
I tried using nVidia, AMD, and IntelQSV as options (I have an AMD processor and 3060 nVidia gpu (Asus RoG Zephyrus G14 with 40 gigs of RAM).

The timeline consists of:
PNG files created in Illustrator 2022 with Alpha Channels
PNG screen captures from the video preview window in Vegas using the floppy disk icon above the preview window
One JPG file that is an orthomosaic that comes in about 1 gig in file size (no issues rendering that portion of the video). I use keyframes within the pan&crop window to zoom out slowly on this.
Fades on the PNG graphics with alpha channels.
No audio.

Autel Evo II Pro files with the following properties (timeline is based off these settings, and PNG files are set to this dimension):

Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/mp41)
File size : 179 MiB
Duration : 14 s 334 ms
Overall bit rate : 105 Mb/s
Writing application : Lavf58.20.100

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5.1@Main
HDR format : SMPTE ST 2086, HDR10 compatible
Codec ID : hvc1
Codec ID/Info : High Efficiency Video Coding
Duration : 14 s 334 ms
Bit rate : 105 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 24.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.525
Stream size : 179 MiB (100%)
Title : Autel.Video
Color range : Full
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Mastering display color primaries : BT.709
Mastering display luminance : min: 0.0000 cd/m2, max: 0 cd/m2
Codec configuration box : hvcC

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Comments

Howard-Vigorita wrote on 7/12/2022, 2:46 PM

Seems like Vegas wouldn't let you waste time rendering for a file that results in 0 bytes. The polite thing would be to give you a pop up telling you that you shouldn't waste your time as it will not give you what you want. The best thing would be to remove that from the rendering options if you have GPU acceleration turned off so that it's not even an option.

@j.razz My guess is there's a problem with Vegas dealing with the amd video driver for the igpu built into your cpu. You might want to check with Asus and make sure you're using the official driver for their hardware implementation. Using a general purpose video driver with a notebook or laptop is often a gamble. Also, haven't seen many Vegas users mention using systems with an amd igpu so not sure how much feedback is available from users with similar systems. Suggest you do a Vegas support request... maybe the developers have tested Vegas with such a system.