On 04-09-2025 20:59, felix.quintgz--- via ffmpeg-user wrote:
I have updated the version of ffmpeg that I have from
2023-11-15-git-78f55457c9-full_build-www.gyan.dev to ffmpeg version
N-120957-g66e40840d1-20250903 and now the same files encoded with the same
parameters are larger.
The conversion speed of my test file has increased significantly, dropping from
7:38 minutes to 1:20 in the latest version for the same parameters, but the
final file size has increased.
I have tried with several files and the same thing happens in all of them.
This is the line I use for the conversion, the parameters are set for a minimum
VMAF of 96.
ffmpeg.exe -i "origen.mp4" -c:a copy -c:v libsvtav1 -crf 32 -preset 6 -svtav1-params
tune=1:fast-decode=1 -pix_fmt yuv420p10le -g 240 "destino.mp4"
I have a small test file encoded with H.264, 35.7 MB in size. When re-encoded
with the old version, it's 25.2 MB, and with the new version, it's 28.9 MB.
It may not seem like much, but with larger files, the difference is noticeable.
What could be happening?
Have the parameters changed?
There have been significant changes in libsvtav1 since then so yes, you
should reconsider your command. Both preset and tune settings have been
changed and behave differently. Most likely you will get comparable
results when you set a lower preset, try 4 to start with.
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