ffmpeg.ctx = avcodec_alloc_context3(codec);
				if (codec->capabilities & AV_CODEC_CAP_TRUNCATED)
					ffmpeg.ctx->flags |= AV_CODEC_FLAG_TRUNCATED;

			//we can receive truncated frames
			ffmpeg.ctx->flags2 |= AV_CODEC_FLAG2_CHUNKS;
			ffmpeg.ctx->flags2 |= AV_CODEC_FLAG2_SHOW_ALL;

			ffmpeg.ctx->thread_count = 1;

			//prefer this as its our target format
			ffmpeg.ctx->pix_fmt = AV_PIX_FMT_NV12;
			ffmpeg.ctx->refcounted_frames = 0;