[FFmpeg-user] I try to use libvvenc for encoding and get only "speed=0.0991"

[Alex]

Hi.

I'm curious about the new vv codec and tried to encode a small file with 
libvvenc. https://ffmpeg.org/ffmpeg-codecs.html#libvvenc

What suprices me was that I only get a very low speed for encoding.

```
frame=36660 fps=3.0 q=-0.0 size=   86272KiB time=00:20:23.08 bitrate= 
577.8kbits/s speed=0.0991
```

I'm pretty sure I make something wrong, maybe somebody can give me a hint what's 
wrong and what's the right solution can I use.

```shell
ffmpeg -i testfile.mp4 -c:v libvvenc -c:a copy testfile-manual_libvvenc.mkv

ffmpeg version 7.1 Copyright (c) 2000-2024 the FFmpeg developers
   built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04)
   configuration: --disable-decoder=amrnb --disable-gnutls --disable-liblensfun 
--disable-libopencv --disable-podpages --disable-sndio --disable-stripping 
--enable-avfilter --enable-chromaprint --enable-frei0r --enable-gcrypt 
--enable-gpl --enable-ladspa --enable-libaom --enable-libaribb24 --enable-libass 
--enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio 
--enable-libcodec2 --enable-libdav1d --enable-libdc1394 --enable-libdrm 
--enable-libdvdnav --enable-libdvdread --enable-libfdk-aac --enable-libflite 
--enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme 
--enable-libgsm --enable-libharfbuzz --enable-libiec61883 --enable-libilbc 
--enable-libjack --enable-libjxl --enable-libklvanc --enable-libkvazaar 
--enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb 
--enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg 
--enable-libopenmpt --enable-libopus --enable-libplacebo --enable-libpulse 
--enable-librabbitmq --enable-librist --enable-librsvg --enable-librubberband 
--enable-libshine --enable-libsmbclient --enable-libsnappy --enable-libsoxr 
--enable-libspeex --enable-libsrt --enable-libsvtav1 --enable-libtesseract 
--enable-libtheora --enable-libtwolame --enable-libvidstab 
--enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp 
--enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 
--enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 
--enable-nonfree --enable-omx --enable-openal --enable-opencl --enable-opengl 
--enable-openssl --enable-postproc --enable-pthreads --enable-shared 
--enable-version3 --incdir=/usr/include/x86_64-linux-gnu 
--libdir=/usr/lib/x86_64-linux-gnu --prefix=/usr --toolchain=hardened 
--enable-vaapi --enable-libvpl --enable-libxavs2 --enable-libdavs2 
--enable-libvmaf --enable-libvvenc --cc=x86_64-linux-gnu-gcc 
--cxx=x86_64-linux-gnu-g++ --disable-altivec --shlibdir=/usr/lib/x86_64-linux-gnu
   libavutil      59. 39.100 / 59. 39.100
   libavcodec     61. 19.100 / 61. 19.100
   libavformat    61.  7.100 / 61.  7.100
   libavdevice    61.  3.100 / 61.  3.100
   libavfilter    10.  4.100 / 10.  4.100
   libswscale      8.  3.100 /  8.  3.100
   libswresample   5.  3.100 /  5.  3.100
   libpostproc    58.  3.100 / 58.  3.100

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'testfile.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2avc1mp41
     encoder         : Lavf55.1.100
   Duration: 00:39:57.90, start: 0.000000, bitrate: 1184 kb/s
   Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), 
yuv420p(progressive), 854x480 [SAR 1:1 DAR 427:240], 993 kb/s, 29.97 fps, 29.97 
tbr, 11988 tbn (default)
       Metadata:
         handler_name    : VideoHandler
         vendor_id       : [0][0][0][0]
   Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, 
fltp, 127 kb/s (default)
       Metadata:
         handler_name    : SoundHandler
         vendor_id       : [0][0][0][0]
   Stream #0:2[0x10000](und): Data: none (rtp  / 0x20707472), 47 kb/s (default)
       Metadata:
         creation_time   : 2015-07-10T17:32:50.000000Z
         handler_name    : GPAC ISO Hint Handler
   Stream #0:3[0x10001](und): Data: none (rtp  / 0x20707472), 9 kb/s (default)
       Metadata:
         creation_time   : 2015-07-10T17:32:53.000000Z
         handler_name    : GPAC ISO Hint Handler
Stream mapping:
   Stream #0:0 -> #0:0 (h264 (native) -> vvc (libvvenc))
   Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help

[libvvenc @ 0x5a8b79567780] libvvenc version: 1.12.0
Output #0, matroska, to 'testfile-manual_libvvenc.mkv':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2avc1mp41
     encoder         : Lavf61.7.100
   Stream #0:0(und): Video: vvc (vvc1 / 0x31637676), yuv420p10le(progressive), 
854x480 [SAR 1:1 DAR 427:240], q=2-31, 29.97 fps, 1k tbn (default)
       Metadata:
         handler_name    : VideoHandler
         vendor_id       : [0][0][0][0]
         encoder         : Lavc61.19.100 libvvenc
   Stream #0:1(und): Audio: aac (LC) ([255][0][0][0] / 0x00FF), 48000 Hz, 
stereo, fltp, 127 kb/s (default)
       Metadata:
         handler_name    : SoundHandler
         vendor_id       : [0][0][0][0]
frame=36660 fps=3.0 q=-0.0 size=   86272KiB time=00:20:23.08 bitrate= 
577.8kbits/s speed=0.0991
```

That's the vv encoders
```
ffmpeg -hide_banner -encoders|egrep -i vv
  VFS..D dvvideo              DV (Digital Video)
  V....D libvvenc             libvvenc H.266 / VVC (codec vvc)
```

That's the HWAccels
```
ffmpeg -hide_banner -hwaccels
Hardware acceleration methods:
vdpau
vaapi
qsv
drm
opencl
```

I have also run a encode with av1 and this was quite fast.

```
ffmpeg -hide_banner -i testfile.mp4 -c:v libsvtav1 -c:a copy 
testfile-manual_libsvtav1.mkv
```

That's the test files in the directory.

```
ls -larth testfile*
-rw-r--r-- 1 alex alex 339M Okt 17 14:30 testfile.mp4
-rw-rw-r-- 1 alex alex 298M Okt 17 15:11 testfile-manual_libsvtav1.mkv
-rw-rw-r-- 1 alex alex  89M Okt 17 18:46 testfile-manual_libvvenc.mkv
```

Which further information's do you need for analyzing?

Regards
Alex