On Sun, Jun 30, 2019 at 18:05:36 +0200, Paul B Mahol wrote: > + DeesserChannel *chan = &s->chan[i];; Duplicate semicolon. > + av_frame_copy_props(out, in); This can also return AVERROR(ENOMEM)? Everything else looks fine, with my little knowledge, incl. docs. Untested. Cheers, Moritz