+ if (!c->frame->buf[0]) {
+ ret = ff_encode_get_frame(avctx, c->frame);
+ if (ret < 0 && ret != AVERROR_EOF)
+ return ret;
+ }
+
+ if (c->frame->buf[0]) {
+ sample = mf_avframe_to_sample(avctx, c->frame);
+ if (!sample) {
+ av_frame_unref(c->frame);
+ return AVERROR(ENOMEM);
+ }
+ if (c->is_video && c->codec_api) {
+ if (c->frame->pict_type == AV_PICTURE_TYPE_I || !c->sample_sent)
+ ICodecAPI_SetValue(c->codec_api, &ff_CODECAPI_AVEncVideoForceKeyFrame, FF_VAL_VT_UI4(1));
+ }
+ }
+
+ ret = mf_send_sample(avctx, sample);
+ if (sample)
+ IMFSample_Release(sample);
+ if (ret != AVERROR(EAGAIN))
+ av_frame_unref(c->frame);
+ if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
+ return ret;
+