Implementing SVT-VP9/AV1 in Voukoder

    When building everything in debug mode Premiere doesn't freeze and I have also tested an export with SVT-AV1 and it worked. The video file looks good so far :) But the question is why it does freeze in release mode?

    I had also a problem with libx264 in debug mode. I got this error every time when compiling ffmpeg with --enable-libx264:

    Has anyone an idea to solve that error?

    It's really strange, sometimes when running premiere it doesn't freeze when opening the export window and I can export a video with svt-av1. But i can't say whats the exact thing that causes the freeze, expect compiling in release mode.

    But I have also noticed that opening the export window in premiere when compiled in debug mode, premiere is not responding for 1-3 seconds, but then it gets its act together again.

    I think it could be something with the C/c++ optimizations when compiling, because in debug mode it works every time on my side, except the little not responding time.

    When opening the export window and svt-av1 is initialized to check if the codec is available, the ram usage goes up to 12 GB from 4GB. In visual studio you can also see that there are a lot of threads which are starting when svt-av1 is loaded. This scenario appears only when svt-av1 is loaded. You can see it in the screenshot below

    If I skip the check with this code:

    Code
    if (id == "libsvt_av1") {
                        EncoderInfo encoderInfo;
                        if (EncoderUtils::Create(encoderInfo, jsonResource))
                            encoderInfos.push_back(encoderInfo);
                        return TRUE;
                    }

    everything works normal.

    I think I have maybe found a fix and an speed improvement in general :)

    Setting the resolution to HD instead of FHD speeds up loading times of every video codec. For SVT-AV1 it means RAM usage only goes at 9 GB and the loading time from 9 seconds to 2,5 seconds in debug mode.

    I will test later in release mode. I have attachted a screenshot with the lines in the source code (EncoderUtils.cpp).

    The smallest resolution I could set without the exception was 1280x720. I have also tested SVT-Av1 in release mode now with this lower resolution. Premiere freeze hasn't stopped in general, but I could open export window more often without freezing with this lower resolution (something around 3/10 times it works instead of 1/10). For now we should wait a while as you said, before implementing it finally. I will test SVT-HEVC and SVT-VP9 in the next days if they have the same issue in release mode and write my results down here :)

    SVT-HEVC is working fine without any freeze or memory leak. Exporting a video file works as well :)

    Performance is also impressive compared to default hevc (1080p default encoder settings):

    Code
    Exported 5278 frames in 46 seconds. (avg. 113 fps)

    CPU usage was all the time at 100% :)

    • Offizieller Beitrag

    We need to be really carefull with SVT. It seem it is highly experimental. Building the libs work fine now. But when doing an FFmpeg build ...

    • VP9 is using pthreads.lib and m.lib (Does not exist on windows)
    • The libs conflict with eachother
    • There are unresolved symbols from some missing dependencies

    We should be wait for a stable release.

    Edit: svt-hevc has been successfully compiled in.

    Yes SVT-Vp9 and SVT-AV1 are pretty experimental. SVT-HEVC works without the two others fine on my side. I think implementing SVT-HEVC is ok, but with the two others we should wait a while. I have done a lot of encoding and stability tests with SVT-HEVC in voukoder now and everything worked.

    Edit: I can upload a Voukoder .prm file with SVT-HEVC included if you want to test some encodings ;)

  • Vouk 19. August 2019 um 10:57

    Hat das Label von Fertig auf Geplant geändert.
    • Offizieller Beitrag

    Implemented AV1:

    Code
    [21:27:01] Frame #439: vRender: 31 us, vProcess: 16 us, vEncoding: 63649 us, aRender: 61 us, aEncoding: 265 us, Latency: 64077 us
[21:27:01] Frame #440: vRender: 23 us, vProcess: 11 us, vEncoding: 27684 us, aRender: 54 us, aEncoding: 254 us, Latency: 28058 us
[21:27:05] Frame #441: vRender: 27 us, vProcess: 15 us, vEncoding: 3904113 us, aRender: 61 us, aEncoding: 509 us, Latency: 3904768 us
[21:27:06] Frame #442: vRender: 48 us, vProcess: 16 us, vEncoding: 565042 us, aRender: 64 us, aEncoding: 355 us, Latency: 565568 us
...
[21:27:06] Exported 445 frames in 170 seconds. (avg. 2.62 fps)

    I guess I need a better CPU... my 8700K is too slow.

  • Vouk 30. Dezember 2019 um 22:50

    Hat das Label von Geplant auf Nicht möglich geändert.