memset(pipeline_str, 0, sizeof(pipeline_str));
snprintf(pipeline_str, sizeof(pipeline_str), "v4l2src device=%s ! video/x-raw,width=%d,height=%d ! waylandsink",
memset(pipeline_str, 0, sizeof(pipeline_str));
snprintf(pipeline_str, sizeof(pipeline_str), "v4l2src device=%s ! video/x-raw,width=%d,height=%d ! waylandsink",