How ffmpeg should reconcile the input frame rate with the output one.
The default (auto) silently duplicates or drops frames. 'cfr'/'vfr' make the behaviour explicit, which matters for anything that has to be frame-accurate.
auto
How ffmpeg should reconcile the input frame rate with the output one.
The default (
auto) silently duplicates or drops frames. 'cfr'/'vfr' make the behaviour explicit, which matters for anything that has to be frame-accurate.