Beiträge von Vouk

  • ProRes YUVA 4:4:4 (10bit) does not work on VEGAS pro

    QT RLE, yes. It supports "argb" so it should be possible. Cineform I need to test if i can convert the frame buffer to "gbrap12le" easily.

    Magix informed me they were able to reproduce this issue and that I've found a bug in VEGAS. They are working on a fix. So this has to be fixed in VEGAS first, and once i can get the alpha channel data i can feed it to FFmpeg and its various encoders.

  • DaVinci Resolve crashes attempting to output x265

    It worked for me to export with 24 fps.

    Can you check why your color transfer is (null) resp. gamma22? Maybeyou can set all color formats to bt709?

    Looks like this on my machine:

  • Failed to encode the audio samples

    The are some issues here.

    1. You are using 24bit audio, right? Can you switch to either 16 or 32 bit? There are currenty issues with feeding 24bit audio to FFmpeg.

    2. The color TRC you are using doesn't seem to be supported.

    3. I am not exactly sure what this is about:

    [12:07:52] FFmpeg: Application provided duration: -9223372036854775808 / timestamp: -9223372036854775808 is out of range for mov/mp4 format

    [12:07:52] FFmpeg: pts has no value

  • Washed Out Colours

    It seems it is about the color range.

    Code
    Color range                              : Full
colour_range_Original                    : Limited

    Can you try using the limited color range instead? AFAIK Limited is standard for most formats.

  • Help! Voukoder doesn't use my GPU!

    This is coming up again and again. That's why I'm gonna explain it one more time and then pin this topic.

    The Basics

    The software you are using Voukoder with (i.e. Premiere, VEGAS Pro, ...) needs to render frames first before it hands them over to Voukoder so it can encode them (using CPU, NVENC, ...). The rendering process is mostly done on the CPU and depending on your system and the complexity of your project it takes its time - lets say it can render 13 frames per second.

    That means Voukoder gets 13 frames per second which it should then encode with the fastest GPU available (lets assume an imaginary RTX 7090 TI which can do like 700 fps 8K with NVENC).

    So you would like to get an export speed of 700 fps because that's what you've just bought this awesome GPU for, right? But how can the GPU do that when it just gets 13 fps from the rendering engine?

    This is a so called "bottle-neck" and will be visible as low GPU utilization.

    A Step Further

    The above assumes the chosen rendering engine is using all CPU cores. But what if it is only using 4 cores (for whatever reason)? Your new AMD Ryzen 9950X with 256 cores is mostly ideling, just as your GPU. And still, Voukoder can't do anything about it, it just takes what it gets and tries to do its best.

    In Depth Explanation

    See this forum thread: https://www.voukoder.org/forum/thread/352

    Edit:

    By the way: Container formats create a multiplexed data stream of alternating video and audio packets, like:

    VAVAVAVAVAVAVAVAV ...

    So after one video frame we have to encode one (or more) audio frames to keep the muxer happy and the video encoder is idleing for that time span:

    (Frame #0/x = video, Frame #1/x = audio)

  • ProRes YUVA 4:4:4 (10bit) does not work on VEGAS pro

    So If I understand this correctly:

    • The Video with the transparent background "Voukoder for VEGAS Alpha Channel test" is being exported correctly with that Alpha Channel template, right? If so then basically Voukoder is basically working.
    • Even on the timeline everything looks correct.
    • When rendering the final video there are issues in the rendered video.

    I guess this is an issue with VEGAS and/or with its settings as the transparent video itself is looking correct. But when using this clip again issues are happening. But that's VEGAS responsibility. Maybe you shoudn't use the alpha channel template for the final video.

    • Render the text clip with the alpha channel template
    • Render the final clip with a non-alpha channel template (as you don't want alpha information there)

  • Maintenance

    The website had a little downtime this morning while I was upgrading both the OS and the forum software. Basically I ended up with a clean installation of everything on a new cloud instance. The voukoder.org server got a new IP address and it might take some time until all DNS records are updated.

    If you experience any issues with the forum / website please let me now.

    Thanks.

  • Voukoder can not USE the potential of NVENC GPUS

    I posted a link to a topic that exactly explains the situation of the bottle necks. Don't just read the TL;DR if you want to understand this.

    You are comparing "Staxrip" to "Premiere + Voukoder". "Premiere+Voukoder" will always be slower than any single file transcoding software. And Premiere is not using all CPU cores for rendering.