size_t width = global_flags.width, height = global_flags.height; // Doesn't matter for MJPEG.
mux.reset(new Mux(avctx, width, height, Mux::CODEC_MJPEG, /*video_extradata=*/"", /*audio_codec_parameters=*/nullptr,
size_t width = global_flags.width, height = global_flags.height; // Doesn't matter for MJPEG.
mux.reset(new Mux(avctx, width, height, Mux::CODEC_MJPEG, /*video_extradata=*/"", /*audio_codec_parameters=*/nullptr,